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HomeMy WebLinkAboutDSD-2024-119 - Hidden Valley Flood Risk Reduction CEAStaff Report r NJ :R Development Services Department www.kitchener.ca REPORT TO: Community and Infrastructure Services Committee DATE OF MEETING: March 25, 2024 SUBMITTED BY: Chris Spere, Director Engineering 519-741-2200 ext. 7412 PREPARED BY: Monica Mazur, Project Manager, 519-741-2200 ext. 7135 WARD(S) INVOLVED: Ward 3 DATE OF REPORT: March 7, 2024 REPORT NO.: DSD -2024-119 SUBJECT: Hidden Valley Flood Risk Reduction Municipal Class Environmental Assessment Project File Report RECOMMENDATION: That the Hidden Valley Flood Risk Reduction Municipal Class Environmental Assessment — Project File Report, prepared by Matrix Solutions Inc., dated March 7, 2024, which recommends Alternative 4 as the preferred solution, be received; and further, That the Hidden Valley Flood Risk Reduction Municipal Class Environmental Assessment — Project File Report, be filed with the Ministry of the Environment, Conservation and Parks (MECP) for the mandatory thirty (30) day review period as required by the Environmental Assessment (EA) Act. REPORT HIGHLIGHTS: • The purpose of this report is to document the planning process undertaken for this project in accordance with a `Schedule B' Municipal Class Environmental Assessment (MCEA) process to define a preferred flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. Schedule B projects are required, at a minimum, to complete phases one and two set out in the 2023 MCEA Planning Process, including mandatory consultation with Indigenous Communities, directly affected public and relevant review agencies, to ensure that they are aware of the project and that their concerns are identified and considered, and documenting the assessment requirements in a Project File Report. • The key finding of this report is that increasing flood conveyance at Hidden Valley Road downstream of the Hidden Valley Provincially Significant Wetland (PSW) / Environmentally Sensitive Policy Area (ESPA) is the preferred solution. • The financial implications are that funding for the project is through both development charges (10%) and the Storm Water Utility (90%), with detailed design scheduled for 2027 and construction in 2028. *** This information is available in accessible formats upon request. *** Please call 519-741-2345 or TTY 1-866-969-9994 for assistance. Page 525 of 2162 • Community engagement included a Notice of Study Commencement, a Public Information Centre, First Nations Consultation, an Engage Page, and consultation with the Climate Change and Environment Committee. • This report supports the delivery of core services. BACKGROUND: The City of Kitchener (the City) retained Matrix Solutions Inc. (Matrix) to provide a Municipal Class Environmental Assessment (EA) for flood risk reduction in the Hidden Valley Creek subwatershed. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The project is being carried out in accordance with the requirements of the Environmental Assessment Act and it is being planned under Schedule B. The intent of this project is to identify solutions and design alternatives to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. The Hidden Valley Creek subwatershed is approximately 200 ha located in southeast Kitchener (see Figure 1). The Hidden Valley Creek subwatershed contains a large wetland/woodland environmental complex, which holds classifications of a Provincially Significant Wetland (PSW), Environmentally Sensitive Policy Area (ESPA), and Core Environmental Feature (CEF). Within the study area there are Regionally Significant Woodland and Significant Valley, and species at risk habitat. In addition to being an environmentally sensitive area, the Hidden Valley ESPA/PSW is the hydrologically dominant landscape feature in the subwatershed. The area downstream of the Hidden Valley ESPA/PSW has experienced past flood and erosion impacts related to both specific rainfall - runoff events and/or the release of natural debris -blockages (e.g., beaver dams or natural debris jams) within the wetland feature. Figure 1. Hidden Valley Creek subwatershed Page 526 of 2162 REPORT: Four preliminary alternatives are considered to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. Alternative 1: Do Nothing Alternative 1 proposes a "Do Nothing" scenario in which no changes are made, as per requirements of the Municipal Class EA process. Based on available hydrologic modeling (flows) and hydraulic modeling (elevations), a property downstream of the wetland is flooded during the 1:25 year event and Hidden Valley Road is overtopped during the 1:10 year event under existing conditions. Prior occurrences of flooding at the subject locations are thought to have been, at least in part, the result of beaver dam failure within the wetland. Beaver dams and other partial debris jams within the wetland are still at potential risk for failure under existing conditions. Alternative 2: Reduce Flows Upstream of Wetland Alternative 2 includes the potential implementation of flow attenuation measures upstream of the Hidden Valley wetland, such as stormwater controls to temporarily detain some runoff volume and release it at a reduced rate. Much of the existing development in the headwaters of the subwatershed occurred prior to the large-scale adoption of stormwater management practices; there may be some potential to retroactively implement flow reduction measures for these areas as either standalone facilities (i.e., new facilities to service existing development) or in conjunction with future development. Several new developments are currently proposed upstream of the Hidden Valley wetland that will include stormwater management mitigation measures (e.g., control of post - development flows back to existing rates). These facilities could potentially be modified to "over -control" runoff from newly developing areas (e.g., control of post -development flows to below existing rates) to help reduce flood potential downstream. Alternative 3: Flow Control Structure in Wetland Alternative 3 includes constructing a flow control structure, such as a dam, within the Hidden Valley wetland to create / utilize storage volume above the normal wetland water levels to provide peak flow attenuation for surface water flows to / through the feature. Under existing conditions, it is speculated that naturally occurring beaver dams and/or vegetative debris jams (i.e., deadfall) have built up and subsequently, either partially or completely, at various times over the past decade, resulting in or exacerbating downstream flooding. Engineered flow control measures would replicate the naturally occurring conditions within the wetland while increasing the reliability of the structure. Attenuation within the wetland would reduce the peak flow rate downstream and mitigate future flooding. Alternative 4: Conveyance Improvements Downstream of the Wetland (preferred alternative) Alternative 4 would entail improving conveyance systems through the Hidden Valley Creek corridor downstream of the wetland to safely pass elevated flows across private property and Hidden Valley Road, reducing flooding. There are two intact engineered crossings constricting flow downstream of the Hidden Valley wetland, a driveway crossing on private property and the municipal road crossing under Hidden Valley Road. Page 527 of 2162 Hidden Valley Road does not meet MTO drainage design standards for local roadway crossings under existing conditions, and frequent overtopping of the roadway increases the potential for channel erosion downstream of the crossing. This is of particular interest as the channel runs through or adjacent to other private properties downstream of Hidden Valley Road, and long-term erosion could impact these properties. Improving conveyance at Hidden Valley Road would also improve erosion and long-term slope stability around and immediately downstream of the crossing. Evaluation of Alternative Solutions Based on positive collaborative experiences of recent City of Kitchener projects, this Study adopts the "Framework for incorporating First Nations rights holder priorities and knowledge into an Environmental Assessment" (City of Kitchener and Stantec, 2023). The intent of using this framework is to incorporate rights holder priorities and knowledge into the EA process and achieve a balance of alternative evaluation criteria weighting between ecological, technical, socio-economic and cultural considerations. The integration of indigenous knowledge, lands, land claims, and treaty rights are not specifically identified as a stand-alone category, but rather woven into and throughout all of the considerations identified below. City staff met with the Six Nations of the Grand River and the Mississaugas of the Credit First Nation in September 2023 to present the alternative solutions and receive their input on their preferred solution. Input from the public at the Public Information Center on October 12th, 2023, hidden valley mailing list responses, and Engage Page was also incorporated in the decision-making process. A final evaluation of alternative solutions that incorporates input from the public and First Nations rights holders is presented in Table 1 below. Table 1. Final Evaluation of Alternative Solutions Natural Enuiromment Soeio-ecorko Ait and I i� Cultural ERruirarimernt Technical Environment P Overall Screening Result Preferred Solution Alternative 4 is the preferred solution based on the evaluation of Technical Environment, Social/Economic Environment and Natural Environment. Alternative 4 is also the preferred solution for the Six Nations of the Grand River and the Mississaugas of the Credit First Nation. Alternative 4 has the highest technical score of all alternatives, as it reliably Page 528 of 2162 reduces flood risk, has minimal approval requirements, and requires relatively straightforward construction. Alternative 4 was assessed using a 3,900mm span by 1,200mm rise box culvert which was shown to meet the City and MTO roadway design criteria and reduce road overtopping to flows greater than the 1.50 year flow. Erosion control measures could be implemented upstream of the roadway. This would increase slope stability and reduce sedimentation at the road culvert. In comparison, Alternative 1 does not improve flood risk, and Alternatives 2 and 3 have unreliable potential for reducing flood risk. Alternative 3 would have a prolonged and difficult approval process, which further reduces its technical scoring. Alternative 4 has the highest Cultural and Social -Economic score, as it will reduce flooding, maintain the existing land use, and not have an intensive construction cycle. Alternative 4 improves upon the natural habitat of the area and has the highest Natural Environment scoring. Alternative 1 maintains the existing natural habitat, while Alternatives 2 and 3 have the potential to negatively impact species at risk habitat within the PSW/ESPA. Figure 2 STRATEGIC PLAN ALIGNMENT: w 4 Option 4 — Preferred Solution This report supports the delivery of core services. FINANCIAL IMPLICATIONS: Capital Budget — At this stage, the capital budget required to implement the preferred alternative is $1,000,000. This will be refined during detailed design. Funding for this project is budgeted through Development Charges and the Storm Water Utility, 10% of project cost is allotted to development charges and 90% to the Storm Utility. Operating Budget — The recommendation has no impact on the Operating Budget. COMMUNITY ENGAGEMENT: INFORM — Page 529 of 2162 A Notice of Study Commencement and Notice of Public Information Center have been shared with the public, stakeholders, and rights holders. Project information can be found on www.kitchener.ca/hiddenvallev and www.engagewr.ca/hidden-valley-flood-ea. A Notice of Completion will be issued and followed by a minimum 30 -day public comment period upon Committee approval. The Project File Report will be posted on the Engage Page and filed with the Ministry of the Environment, Conservation and Parks (MECP) for the mandatory thirty (30) day review period as required by the Environmental Assessment (EA) Act. The Notice of Completion will be sent to the Minister of Environment, Conservation and Parks and Director of the Environmental Assessment Branch (EAB). CONSULT — First Nations Consultation: The Notice of Commencement was mailed to Nation Huronne- Wendat, Mississaugas of the Credit First Nation (MCFN), and Six Nations of the Grand River (SNGR). Acknowledgement of the notice was received from MCFN and SNGR. City of Kitchener staff held a meeting with the SNGR on June 15, 2023 and with the MCFN on June 23, 2023 to present the Notice of Commencement. A second meeting was held with MCFN and SNGR in September 2023 to present the alternative solutions, receive input on their preferred solution, and discuss how rights holder priorities and knowledge are incorporated into the EA process. Public Information Centre: A Public Information Centre (PIC) was held on October 12 to share the study background; explain the Environmental Assessment process; outline existing conditions; evaluation criteria; and the alternative solutions. Input from the public at the Public Information Center on October 12th, 2023 was incorporated in the decision- making process. Questions about the project were also received and answered through the Engage Page (www.engagewr.ca/hidden-valley-flood-ea) and project email address (hiddenvallev(a)kitchener.ca). Agency Consultation: Agency consultation included open communication and dialogue with Grand River Conservation Authority throughout the project. City staff presented the project to the City of Kitchener Climate Change and Environment Committee on October 19, 2023 and received support for the preferred alternative solution for flood risk reduction. Landowner Consultation: The key landowner stakeholders within the study area (Pearl Valley Development Corporation and owners of 691 — 748 Hidden Valley Road) were personally emailed copies of the project Notices. Correspondence with landowners is provided in the Project File Report. The Hidden Valley ESPA/ PSW was investigated by Matrix and City Staff on September 27, 2023 under the approval of Pearl Valley Development Corporation. PREVIOUS REPORTS/AUTHORITIES: • Staff Report (No. DSD -2023-453) to Climate Change and Environment Committee on October 19, 2023 for the Hidden Valley Flood Risk Reduction Municipal Class Environmental Assessment presentation of preliminary alternatives considered in the EA process • Hidden Valley Land Use Master Plan Page 530 of 2162 Ongoing Hidden Valley Secondary Plan Staff Report (No. DSD -19-133) to Planning & Strategic Initiative Committee on June 10, 2019 for the Neighbourhood Planning Review: Hidden Valley Land Use Master Plan. APPROVED BY: Justin Readman, General Manager, DSD ATTACHMENTS: Attachment A — Hidden Valley Flood Risk Reduction Schedule B Municipal Class Environmental Assessment Page 531 of 2162 ib'K Matrix Solutions Inc. A Montrose Environmental Company Prepared for: CITY OF KITCHENER Prepared by: MATRIX SOLUTIONS INC., A MONTROSE ENVIRONMENTAL COMPANY Version 1.0 March 2024 Guelph, Ontario Unit 713, 650 Woodlawn Rd. West Guelph, ON, Canada N1K 1138 T 519.772.3777 F 226.314.1908 www.matrix-solutions.com Page 532 of 2162 HIDDEN VALLEY FLOOD RISK REDUCTION SCHEDULE B MUNICIPAL CLASS ENVIRONMENTAL ASSESSMENT Prepared for the City of Kitchener, March 2024 Matthew LeGrand, M.Sc., E.I.T. Water Resources EIT /4o?ESSJOY� (.4 °4 2�� K. M. HOFBAUER 100 15 OF reviewed by Karen Hofbauer, M.A.Sc., P.Eng. Senior Water Resources Engineer DISCLAIMER Matrix Solutions Inc. certifies that this report is accurate and complete and accords with the information available during the project. Information obtained during the project or provided by third parties is believed to be accurate but is not guaranteed. Matrix Solutions Inc. has exercised reasonable skill, care, and diligence in assessing the information obtained during the preparation of this report. This report was prepared for the City of Kitchener. The report may not be relied upon by any other person or entity without the written consent of Matrix Solutions Inc. and of the City of Kitchener. Any uses of this report by a third party or any reliance on decisions made based on it are the responsibility of that party. Neither Matrix Solutions Inc. nor its affiliates are responsible for damages or injuries incurred by any third party as a result of decisions made or actions taken based on this report. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V 1.0_A c c ess i b l e. d o cx Matrix Solutions Inc. A Montrose Environml2aipt62ii3pfQ162 V0.1 12 -Jan- Draft 2024 V1.0 06 -Mar- Final 2024 VERSION CONTROL 31809 Hidden Valley Flood Risk Reduction EA Issued to client for review 2024-01-12 draft v0.1 31809 Hidden Valley Flood Risk Reduction EA Issued for public, 2024-03-06 final V1.0.docx Indigenous, and agency review. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. iii A Montrose Environml2®t;iPtpfQ162 EXECUTIVE SUMMARY The City of Kitchener (City) retained Matrix Solutions Inc., a Montrose Environmental company, (Matrix) to complete a Flood Risk Reduction Environment Assessment (EA) for Hidden Valley Creek in Kitchener, Ontario. Hidden Valley Creek is a watercourse which runs from Wabanaki Drive in the west and King Street East in the north, through a wetland/woodland environmental complex, and outlets to the Grand River. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream reaches of the Hidden Valley Creek subwatershed close to Hidden Valley Road. The project is being carried out in accordance with the requirements of the Environmental Assessment Act and follows the process for Municipal Class EA Schedule B. The intent of this project is to identify alternative solutions to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. The Problem/Opportunity Statement is as follows: "There are several flood vulnerable areas and erosion vulnerable reaches in the downstream reaches of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This Environmental Assessment is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community." Public, Indigenous, and agency consultation was completed as part of the project. A Notice of Study Commencement was mailed out to a list of potentially interested groups and agencies on June 13, 2023. A Public Information Centre was held on October 12, 2023, to introduce the project, summarize the alternative solutions, and provide an opportunity for interested parties to identify any concerns or local information that will support the EA process. A Notice of Completion will be advertised and circulated to the stakeholder list following approval by the City. Four alternatives were assessed for potential to reduce flood risk within Hidden Valley Creek: • Alternative 1 is a Do -Nothing scenario in which no changes are made. • Alternative 2 considers flow attenuation upstream of the Hidden Valley ESPA/PSW through the use of oversized stormwater controls. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx iv A Montrose Environml2atpt62Ir5pafQ162 • Alternative 3 considers construction a flow control structure, such as a dam, within the Hidden Valley ESPA/PSW to provide engineered attenuation within the wetland. • Alternative 4 proposes increasing conveyance downstream of the Hidden Valley ESPA/PSW. Matrix completed a detailed assessment of each alternative solution and ranked each alternative across three categories: • Technical Environment • Cultural/Social Environment • Natural Environment Matrix considered each alternative's ability to address the project objectives with the greatest benefit and least negative impact toward each environmental category. Based on the evaluation of Technical Environment, Social/Economic Environment, and Natural Environment, Alternative 4 is the preferred solution. Alternative 4 has the highest Technical, Cultural and Social -Economic, and Natural Environment score of all alternatives. This alternative reliably reduces Flood Risk, has minimal approval requirements, does not have an intensive construction cycle, and improves upon existing conditions by increasing the habitat connectivity of Hidden Valley Creek and adding native vegetation. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx v A Montrose Environml2®tpt626pafQ162 TABLE OF CONTENTS EXECUTIVE SUMMARY................................................................................................................................. IV 1 INTRODUCTION ................................................................................................................................1 1.1 Problem and Opportunity Statement.................................................................................1 1.2 Study Area...........................................................................................................................1 2 ENVIRONMENTAL ASSESSMENT AND PLANNING CONTEXT............................................................5 2.1 Previous Studies..................................................................................................................5 2.1.1 WalterFedy 2015 - Hydrologic and Hydraulic Study..............................................6 2.1.1.1 Hydrologic Model.................................................................................6 2.1.1.2 Hydraulic Assessment.........................................................................10 2.1.1.3 Erosion Hazards..................................................................................11 2.1.2 Wood 2019 - Flow Monitoring, Calibration, and Hydrologic Study for New Secondary Plan.......................................................................................................................12 2.1.2.1 Flow Monitoring.................................................................................12 2.1.2.2 Hydrologic Model Calibration.............................................................13 2.1.2.3 Hydrologic Results..............................................................................14 2.1.3 Stantec, 2011— 2022 - Flow Monitoring..............................................................16 2.2 Municipal Class Environmental Assessment.....................................................................16 2.2.1 Schedule Selection...............................................................................................18 2.3 Common Law and Riparian Rights.....................................................................................20 2.4 Provincial Policy Statement (2020)...................................................................................20 2.5 A Place to Grow: Growth Plan for the Greater Golden Horseshoe (2019) .......................23 2.6 Grand River Conservation Authority.................................................................................24 2.7 City of Kitchener Planning Context....................................................................................24 2.8 Regional Planning Context................................................................................................25 2.8.1 Waterloo Region Official Plan (2015)...................................................................25 2.8.2 River Road Extension............................................................................................26 2.9 Climate Change..................................................................................................................27 2.10 Source Water Protection...................................................................................................27 3 PUBLIC, INDIGENOUS, AND AGENCY CONSULTATION...................................................................28 3.1 Notice of Commencement................................................................................................29 3.2 Indigenous Consultation....................................................................................................29 3.3 Public Consultation............................................................................................................30 3.3.1 Public Information Centre....................................................................................30 3.3.2 Project Specific Website.......................................................................................31 3.3.3 Project Specific Email Address.............................................................................31 3.4 Agency Consultation..........................................................................................................31 3.4.1 Grand River Conservation Authority....................................................................31 3.4.2 Kitchener Climate Change and Environment Committee....................................31 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx Vi A Montrose Environml2®t;ipt62--�#Q162 3.5 Landowner Consultation...................................................................................................32 3.6 Notice of Completion........................................................................................................32 4 EXISTING CONDITIONS...................................................................................................................32 4.1 Field Investigation.............................................................................................................32 4.2 Survey................................................................................................................................36 4.3 Flood Risk..........................................................................................................................37 4.3.1 Hydrology.............................................................................................................39 4.3.1.1 Flow Monitoring Analysis...................................................................39 4.3.1.2 Flow Rates..........................................................................................39 4.3.2 Hydraulics.............................................................................................................41 4.3.2.1 Hidden Valley Road Hydraulic Capacity Assessment .........................43 4.3.2.2 Hydraulics at Upstream Property.......................................................44 4.4 Natural Environment.........................................................................................................45 4.4.1 Identified Features...............................................................................................45 4.4.2 Aquatic Habitat and Fisheries..............................................................................46 4.4.3 Vegetation Communities and Plants....................................................................46 4.4.4 Wildlife.................................................................................................................47 4.4.5 Significant Wildlife Habitat...................................................................................47 4.5 Social and Economic Environment....................................................................................47 4.6 Infrastructure and Utilities................................................................................................48 5 DEVELOPMENT OF ALTERNATIVE SOLUTIONS...............................................................................49 5.1 Alternative 1: Do-Nothing.................................................................................................49 5.2 Alternative 2: Reduce Flows Upstream of Wetland..........................................................49 5.3 Alternative 3: Flow Control Structure in Wetland.............................................................49 5.4 Alternative 4: Conveyance Improvements Downstream of the Wetland .........................50 6 EVALUATION CRITERIA AND METHODOLOGY................................................................................50 6.1 Technical Environment......................................................................................................51 6.2 Cultural/Social Environment.............................................................................................52 6.3 Natural Environment.........................................................................................................52 7 EVALUATION OF ALTERNATIVES.....................................................................................................53 7.1 Alternative 1......................................................................................................................53 7.2 Alternative 2......................................................................................................................54 7.3 Alternative 3......................................................................................................................56 7.4 Alternative 4......................................................................................................................58 7.5 Evaluation Table................................................................................................................63 8 PREFERRED SOLUTION...................................................................................................................68 9 PROJECT IMPLEMENTATION AND NEXT STEPS..............................................................................69 9.1 Planning.............................................................................................................................69 9.2 Environmental Mitigation Measures and Monitoring......................................................70 9.2.1 Temporary Flow Passage......................................................................................71 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx V�� A Montrose Environml2®t;Z&62i6pafQ162 9.2.2 Notification...........................................................................................................72 9.2.1 Isolation................................................................................................................73 9.2.2 Phasing.................................................................................................................73 9.2.3 Fish Capture..........................................................................................................74 9.2.4 Weather Conditions.............................................................................................74 10 REFERENCES...................................................................................................................................75 TABLE 1 IN -TEXT FIGURES 39 FIGURE1 Study Area.......................................................................................................................... 3 FIGURE 2 Hidden Valley Land Use Master Plan (City of Kitchener 2019) .......................................... 4 FIGURE 3 Monitoring Station Locations............................................................................................. 8 FIGURE 4 InfoSWMM Catchments, As Described in WalterFedy (2015) ........................................... 9 FIGURE 5 Wood (2019) Proposed Stormwater Controls.................................................................. 15 FIGURE 6 Class EA Process—Schedule B.......................................................................................... 19 FIGURE 7 Beaver Dam Location....................................................................................................... 34 FIGURE8 Survey............................................................................................................................... 38 FIGURE 9 Matrix Updated Hydraulic Model..................................................................................... 42 FIGURE 10 Hydraulic Profile — Existing Conditions............................................................................. 44 FIGURE 11 Evaluation Criteria............................................................................................................ 51 FIGURE 12 Flood Level Comparison................................................................................................... 60 FIGURE 13 1:50 -year Profile Comparison........................................................................................... 61 APPENDIX F IN -TEXT TABLES TABLE 1 Flow Monitoring Data Collection Periods........................................................................ 39 TABLE 2 Crossing Dimensions........................................................................................................ 40 TABLE3 Peak Flow Rates................................................................................................................ 41 TABLE 4 Design Criteria for Hidden Valley Road............................................................................ 43 TABLE 5 Existing Conditions Hydraulic Results for Hidden Valley Road ......................................... 44 TABLE 6 Alternative 4 Hydraulic Results for Hidden Valley Road for the 10 -year Flow ................ 58 TABLE 7 Detailed Evaluation Table................................................................................................. 64 TABLE 8 Minimum Minor Return Period for Temporary Works (MTO 2008) ................................ 72 APPENDICES APPENDIX A Public, Indigenous, and Agency Consultation Package APPENDIX B Site Photographs APPENDIX C Hydraulic Analysis APPENDIX D Flood Frequency Analysis APPENDIX E Ecology Report APPENDIX F Hidden Valley Land Use Master Plan (2019)......................................................................... 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx VIII A Montrose Environml2®tpt629pafQ162 INTRODUCTION Hidden Valley Creek is a watercourse in southern Kitchener which runs from Wabanaki Drive in the west and King Street East in the north, through a wetland/woodland environmental complex, and outlets to the Grand River. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream reaches of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This Environmental Assessment (EA) is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The project is being carried out in accordance with the requirements of the Environmental Assessment Act and follows the process for Municipal Class EA Schedule B. The intent of this project is to identify alternative solutions to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. 1.1 Problem and Opportunity Statement There are several flood vulnerable areas and erosion vulnerable reaches in the downstream reaches of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. 1.2 Study Area Hidden Valley Creek receives drainage from a catchment of approximately 190 ha. The western portions of the catchment are developed with medium to high density land use, the southern limits contain low-density residential land use, and the centre and northern portions of the catchment are undeveloped. The study area shown in Figure 1 encompasses the entire catchment area. Development has resulted in greater impervious area within the upper limits of the catchment. Specifically, in 2008 there was development of the Kitchener Operations Facility and a commercial parking lot west of Wabanaki Drive. Further development is anticipated east of Wabanaki Drive and south of Hidden Valley Road. The City of Kitchener's Hidden Valley Land Use Master Plan (City of Kitchener 2019) describes the anticipated development for the 183 ha region. Areas contained within the bounds of Hidden Valley Road have works planned for the development of low-rise residential, 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 1 A Montrose Environml2atpt6MpafQ162 medium -rise residential, mixed-use, commercial, and high-rise residential land use. The limits of the proposed development plans are shown in Figures 1 and 2. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. A Montrose Environml2at,ipt6A4pf 1162 v C,4 ko J.W N E °^ H E yu°LU C N N EO L O Q 6 I U wU v/w Y O a N O O ❑ u�y L (n _ T C t/`1 .0 Q 16 ° N O �_ Z E❑� 'o > O c _ U(7 o R w J Ess No $e aoo oar aos oar oao oar oos oar aoa oar oos oar E3 11 WM dp Alf oO"Noslaaow � ° � � } d v v Z N � • ,s w �� ���(. �o ,gym ❑ U� U 1 2C? � 777 1 o� 6� J �J�� CNPN°DRIP p1 -S 9 U 5 l OyGQ' °O �°°U' F GLOP s G P G I!W is obN� a� °s lbHOpoM MANIT OU DR N18 O ..e• �,, 000 oar aos oar o00 oar oos oar jjj.j_- oos_os� (w) 6u141JON N NSA O 1 T it it 2 3 O `. ia C N O vl 'yam - 1 FRO fi �►Ij►l1� w` OL t O O N U) Ji ANN w 7 N la v N O 7:3N m N CU01 ro - = N a � C) N a n ami 76C ._N0 aC 1- O z E aC ON O N O ENU NOA ca a co 9N -6'O . .N N 7 -N5 Om C l0 d O Q O UN 1 N CN N Q' Q' d N . Ir' wd -p 'O O N 0 T w N O i0 U. N f6 d• (n Ql .=J N Y_ C SO a E Ll X 0 � '0 0 a w j m .� H d .� 4 u `O .X 0 o 2 U [O Z O C', m a N Z, v Z 2 J aa) cU W a- C 2 O °ov 0011011181 CL E E E7 O l0 O O E � '� = % O w O O in r > J _:� � � �co r N Cl) V J (� li7 d a a, •, = d Z N NSA 1 it it 2 `. ia RAM 'yam - 1 FRO fi �►Ij►l1� w` OL ANN 21 ' a o r There is a large woodland/wetland complex in the centre of the catchment, which holds classifications of a Provincially Significant Wetland (PSW), Environmentally Sensitive Policy Area (ESPA), and Core Environmental Feature (CEF). Within the study area there are regionally significant woodland and significant valley, species at risk habitat, and a warmwater fishery. In addition to being an environmentally sensitive area, the Hidden Valley ESPA/PSW is the hydrologically dominant landscape feature in the subwatershed. The area downstream of the Hidden Valley ESPA/PSW has experienced flood and erosion impacts related to both specific rainfall -runoff events or the release of natural debris -blockages (e.g., beaver dams or natural debris jams) within the wetland feature. Two hydrologic investigations have been conducted for the Hidden Valley catchment: • WalterFedy (2015) undertook a hydrologic and hydraulic analysis of the Hidden Valley Subwatershed and created hydrologic and hydraulic models. • Wood (2019) conducted a hydrologic calibration study to better represent the Hidden Valley ESPA/PSW region with the WalterFedy hydrologic model. The study included a flow monitoring program upstream and downstream of the Hidden Valley ESPA/PSW. Greater detail on the methodology and results of the two studies are presented in Section 2.1. 2 ENVIRONMENTAL ASSESSMENT AND PLANNING CONTEXT Previous Studies The existing hydrology and hydraulics of the Region have been studied in two previous assessments. In 2015 WalterFedy conducted a hydrologic and hydraulic study of the Hidden Valley Creek subwatershed which was followed up by a flow monitoring, calibration, and hydrologic study for the new secondary plan conducted by Wood PLC (Wood) in 2019. The goals, findings, and limitations of the two studies are outlined below. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 5 A Montrose Environml2®tptpafQ162 2.1.1 WalterFedy 2015 - Hydrologic and Hydraulic Study WalterFedy conducted a hydrologic and hydraulic study of the Hidden Valley Creek subwatershed in 2015, creating a hydrologic model for the entire catchment area using InfoSWMM and a localized hydraulic HEC -RAS model downstream of the wetland feature. The goals of their study were to investigate the root causes of the existing erosion and flooding of the creek and gain insight into the best mitigation options. The objectives outlined include: • Develop a calibrated hydrologic model. • Determine the causes of existing erosion and summarize inundation levels downstream of the wetland. • Evaluate the possible impacts of the proposed River Road development on the wetland. • Determine if specific techniques to reduce the quantity and rate of runoff from the proposed River Road development are warranted. • Provide suggestions on stormwater criteria for future developments within the subwatershed. • Examine the potential for collaborative channel erosion mitigation options that will address existing problems and future developments. • Provide an analysis on the flow capacity of the existing culvert crossing at Hidden Valley Road. In addition to hydrologic and hydraulic modelling of Hidden Valley Creek subwatershed, field monitoring was undertaken to measure flow at three locations in 2014. The flow monitoring stations were labelled SW1 (located downstream of Hidden Valley Road), SW2 (located along the west tributary) and SW3 (located along the north tributary; Figures 3 and 4). 2.1.1.1 Hydrologic Model WalterFedy created a hydrologic model, using InfoSWMM, for both existing conditions and future conditions as outlined in the Class EA River Road Extension, River Road Stormwater Report (Stantec 2013). The existing model contained 60 subcatchments delineated through a combination of drainage infrastructure, site topography, field review and land use mapping (Figure 4). Topographic and aerial maps were used to 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 6 A Montrose Environml2®tpt6A5pafQ162 define catchment slope and imperviousness, respectively, and soil parameters were uniformly applied to all catchments based on the average soil class of "gravelly loam." Catchments within the northwestern and southwestern areas of the study area were of primarily industrial and commercial land use, while catchments to the southeast were of low-density residential land use. Recent aerial photography indicates that additional development in the south and west areas of the catchment (south of Hidden Valley Road) have occurred since this study. The hydrology of the Region was modelled in response to the 25 mm, 1:2 -year through 1:100 -year return period synthetic storms, and the Regional storm. Two storm pond facilities were included in this study and the wetland feature was represented as a storage node, with a stage -storage relationship developed through analysis of the topographic information. A beaver dam was noted in the wetland and assumed to be the primary hydraulic control for the wetland. WalterFedy questioned the stability and reliability of the dam to provide stormwater attenuation, speculating that the natural sedimentation process would reduce active storage volume over time. Inspection from aerial imagery indicates the dam may have drained since the investigation, with visual water recession observed post -2016. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0Accessible.docx A Montrose Environml2®tpt6A6pafQ162 1C z q Q LL r1 w 11 l t Precise calibration of the wetland feature was not a goal of this study, and as such there is significant variability presented in the results downstream of the Hidden Valley ESPA/PSW. Further calibration of the model, specifically with regard to wetland inflow/outflow response, was conducted by Wood in 2019. Details on the calibration process is presented in Section 2.1.2. Three proposed conditions scenarios were created by WalterFedy to assess the impacts of upstream development with and without stormwater control: 1. River Road development conditions 2. River Road and future development conditions with Regional pond control 3. River Road and future development conditions with Regional pond and Low Impact Development (LID) control The results of the study indicated that implementation of the River Road Development without accompanying stormwater controls would increase peak flows entering the west and north tributaries of the creek. From an event -based water balance, the incremental increases in flow volumes are not expected to have detrimental impacts on the hydroperiod of the wetland. Minimal changes were expected to the water levels within the wetland, due to the large surface area available for storage. In order to accommodate the increased flows (match existing flows), two new stormwater pond facilities were recommended and upsizing of the North Wabanki Pond was recommended. It was observed that implementing LID controls reduced the quality and quantity control strain on the pond facilities and increased the infiltration of stormwater, thus improving regional water balance. 2.1.1.2 Hydraulic Assessment An existing conditions hydraulic model was established for the channel downstream of the wetland to the Grand River based on surveyed cross-sections. The purpose of the hydraulic modelling was to assess inundation and the hydraulic capacity of Hidden Valley Road. Both the driveway culverts and Hidden Valley Road culverts were observed to create a backwater effect in the model by restricting conveyance for all design storm events. It was determined that backwater at the Hidden Valley Road culvert does not 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 10 A Montrose EnvironmI2atpt6A9pafQ162 extend to the building at 735 Hidden Valley Road and is not the cause of the flooding. However, under the assumption of exiting development conditions and a beaver dam attenuating flows, a box culvert of span 2.5 m and rise 1.0 m was assessed to meet MTO criteria for an arterial road, conveying a maximum flow of 12.8 m3/s. Without beaver dam attenuation, the maximum flow would be 14.8 m3/s (based on the uncalibrated hydrology model) and would require a 3.8 m span box culvert to provide sufficient conveyance. Varying scenarios of peak flow rates were also tested to determine if increased development upstream of the wetland complex have or will influence flooding downstream at Hidden Valley Road. Pre-existing flows, assuming conditions preceding the Kitchener Operations Facility and Best Buy development in 2008, were compared to existing conditions and it was determined that there was negligible difference to the flood extents within the Hidden Valley Corridor. These results indicated that flooding downstream of the wetland was not a result of increased upstream development. Additionally, a scenario of ultimate development considering the River Road Extension plans were tested and it was indicated that the proposed development does not influence inundation at Hidden Valley Road, as the proposed stormwater management controls would throttle post -development flows to pre -development magnitudes. Flooding downstream of the wetland was speculated to be a result of a failure of the beaver dams in the wetland, as removal of the dam attenuation results in a 16% increase of peak flow in the channel. 2.1.1.3 Erosion Hazards During the survey of the site by WalterFedy in 2015 major bank erosion was identified along the channel and undercutting of both CSP culverts. The remains of a blown -out culvert were observed 50 m upstream of the property during the survey. The soil texture class (sandy and gravely loam) and steepness of the channel and bed slopes were remarked to promote high velocities and potential for further erosion. Two potential solutions were evaluated to remediate erosion hazard, including protecting the creek bed and banks and creating a geomorphically stable system. Armour stone or riprap were suggested to harden the banks and prevent further erosion. Velocity dissipation devices such as grade control structures would reduce 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 11 A Montrose Environml2at;iPt6fr6pafQ162 velocity in the channel, slowing potential erosion. Alternatively, naturalization of the channel and widening the floodplain would mitigate erosion and stabilize the creek. 2.1.2 Wood 2019 -Flow Monitoring, Calibration, and Hydrologic Study for New Secondary Plan Wood conducted a hydrologic investigation in 2019 with the goal of calibrating the Hidden Valley EPSA/PSW in the WalterFedy hydrology model and understanding the impact of the proposed development upstream of the feature. 2.1.2.1 Flow Monitoring Flow monitoring data was collected by Wood at the same locations as the WalterFedy (2015) study and used to compliment the 2015 dataset. Water level data was collected using level -loggers with an acoustic doppler to allow for conversion to flow. As rating curve data was not available for the full range of monitored water levels, a rating curve was developed for each station in HEC -RAS by adjusting channel and bank roughness to match the measured stream stage and discharge. Rainfall data from both the nearest rainfall gauging station (City of Kitchener's Operation Facility) and the nearest Environment Canada gauge (ID 6144239) were used to relate streamflow to precipitation events. The period in which streamflow was monitored (2017) was atypically dry compared to the climate normal for the Region. As such, the calibration process suffered for only measuring low flow events. Data from the flow monitoring stations (refer to Figure 3 for locations) indicated that SW1 and SW3 show more muted responses to precipitation events than SW2 and SW2 exhibits the highest rate of baseflow. Oddities in the data, such as SW3 exhibiting dry weather diurnal flow, are unexplained. The rating curve fits for the three stations were good for low flows but lacked any high flow points to allow for proper calibration of a rating curve. Comparison between measured and modelled flow at SW2 showed a very poor fit, which attests to the limited reliability of the measured flows. Due to the lack of high flow data, supplemental data from Stantec (2011-2017; refer to Section 2.1.3) was used to provide a more comprehensive dataset The location of the Stantec monitoring was close, but not at an exact location when compared to the Wood 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 12 A Montrose Environml2®t;iPt6f54pafQ162 installed sites (+/- 10 m). The Stantec data also only included low flow events and so did not improve the accuracy of the modelled high flow events. 2.1.2.2 Hydrologic Model Calibration A total of 15 precipitation events were used to calibrate the existing condition hydrologic model. A storage -discharge relationship was developed for the wetland, but overestimated streamflow with a relatively low coefficient of determination between simulated and observed streamflow. A sensitivity analysis was performed for various hydrologic parameters, including soil hydraulic conductivity, catchment directly connected imperviousness, wetland storage volume, and wetland discharge rate. Catchment width/length, overland flow roughness, and depression storage were excluded form the analysis. Changes to the soil parameters and directly connected imperviousness of the catchment increased the fit to the estimated runoff at flow locations SW2 and SW3. Modifications to the wetland storage node, including the wetland feature and beaver dam, were less successful. The wetland node was calibrated solely against SW1 and with changes to initial depth, seepage rate, and outlet discharge relationships. Initial depth and seepage rate were calibrated according to the received model and information from the Stage 1 Hydrogeology Study, River Road Extension (Stantec 2013), and deemed to be relatively insensitive for long-term simulations. It is unclear whether the structures are based on empirical relationships or represent the physical outlet configuration of the wetland. While the wetland discharge relationship of the wetland had the greatest impact on results, given the absence of physical information on the outlet and minimal high flow calibration events Wood felt there was no justification to alter the relationship. The results of the calibration process led to an improved model but maintained significant disparity towards measured flows. The Grand River Conservation Authority (GRCA) accepted the fit for the SW2 and SW3 stations, but expressed concern regarding the calibration fit for SW1. A revised effort was undertaken after talks with the GRCA to further calibrate the wetland using the SW1 rating data. Three large storm events were used to calibrate high flow events which resulted in a better fit for peak flow and 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 13 A Montrose EnvironmI2at;iPt(552pafQ162 volume. While sufficient for the 2019 study, the updated calibration is advised to be further recalibrated if used for future works. 2.1.2.3 Hydrologic Results The updated Wood hydrologic model was used to model existing and proposed development conditions. The inclusion and absence of stormwater controls, LIDS, and attenuation from the wetland were considered. The proposed development scenarios were created based on the Hidden Valley Master Land Use Plan (City of Kitchener 2019), the River Road Extension Environmental Assessment (1131 2013), and the Hydrologic and Hydraulic Study (WalterFedy 2015). Due to the lack of detailed grading and lot information for the new developments and road alignments, Wood had considered the stormwater controls described by WalterFedy as adequate. Changes were made to catchment areas for the proposed development along Hidden Valley Road as well as the River Road alignment in accordance with the updated Land Use Plan and River Road Extension Report. Storm sewers along the River Road Extension were not included in the model. An overview of the modelled stormwater controls are shown in Figure 5. Model results indicated that the wetland provides significant attenuation to flows, with 767% greater peak flows downstream when the storage node is removed from existing conditions. Due to the high degree of attenuation, a flow control structure placed downstream of the wetland feature was discussed with the GRCA to mitigate the impacts of a potential beaver dam break. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 14 A Montrose Environml2®t;iPt6fr3pafQ162 2.1.3 Stantec, 2011— 2022 - Flow Monitoring Stantec conducted an Intake Protection Delineation (2010), Pre -Construction Groundwater and Surface Water Monitoring (2014), and a Stage 1 Hydrogeology Study (2013) in support of the proposed River Road Extension. on behalf of the Region of Waterloo. As part of these projects Stantec has captured water level surface data directly upstream of the Hidden Valley Road from December 2011 to December 2021 at a resolution of 1 measurement every 15 minutes, in support of the proposed River Road Extension project. This represents 10 years of monitoring data, including the period at which the Hidden Valley Road crossing was rehabilitated in September 2013. Low flow water levels remain unchanged following the road rehabilitation works, indicating that the pipe configuration and hydraulic conditions remained unchanged pre- and post -rehabilitation. Water surface elevations for the 10 years of monitoring range from 289.9 to 293.78 m. Stantec collected instantaneous flow data 40 times at the location of the water level monitor, with a maximum observed flow rate of 0.389 m3/s. The maximum observed flow rate corresponds to a water surface elevation of 290.86 m, as measured directly upstream of the Hidden Valley Road crossing. This water surface elevation is 3 m below the maximum observed water surface elevation from the 10 -year monitoring period. Typically, observed instantaneous flow data is used to relate measured water surface elevations to a calculated flow rate using a "rating curve." The measured instantaneous flow does not capture high flow events; therefore, the rating curve developed by Stantec is not applicable to water surface elevations above 290.86 m. The flow data collected by Stantec was the primary source for the hydrologic analysis of the current project. Refer to Section 4.3.1 details on the use of this data. 2.2 Municipal Class Environmental Assessment All municipalities in Ontario are subject to the provisions of the Environmental Assessment Act (EAA) and its requirements to prepare an Environmental Assessment (EA) for applicable public works projects. The Ontario MEA "Municipal Class Environmental Assessment" document (2023) provides municipalities with a five -phase planning procedure, approved under the EAA, to plan and undertake all municipal sewage, water, stormwater management, and transportation projects that occur 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 16 A Montrose Environm12®tpt6HpafQ162 frequently, are limited in scale, and have a predictable range of environmental impacts and applicable mitigation measures. In Ontario, infrastructure projects that require works for the purposes of flood or erosion control are subject to the Municipal Class EA process and must follow a series of mandatory steps as outlined in the Municipal Class EA document. The Class EA document identifies five project phases as summarized below: • Phase 1— Problem or Opportunity: Identify the problems or opportunities to be addressed and the needs and justification. • Phase 2 —Alternative Solutions: Identify alternative solutions to the problems or opportunities by taking into consideration the existing environment, and establish the preferred solution considering public and agency review and input. • Phase 3 — Alternative Design Concepts for the Preferred Solution: Examine alternative methods of implementing the preferred solution based upon the existing environment, public and agency input, anticipated environmental effects and methods of minimizing negative effects and maximizing positive effects. • Phase 4 — Environmental Study Report: Document in an Environmental Study Report (ESR), a summary of the rationale, planning, design, and consultation process for the project as established through Phases 1 to 3 above and make such documentation available for scrutiny by review agencies and the public. • Phase 5— Implementation: Complete contract drawings and documents, proceed to construction and operation, and monitor construction for adherence to environmental provisions and commitments. Also, where special conditions dictate, monitor the operation of the completed facilities. Depending on the anticipated level of environmental impact, and for some projects, the anticipated construction costs, the project does not necessarily have to undertake all the aforementioned phases. The Class EA defines three types of projects, referred to as Exempt, Schedule B, or Schedule C, which determine the required process. Projects are categorized according to their environmental significance and their effects on the surrounding environment. Planning methodologies are described within the Class EA and are different according to Class type, such as the following: 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 17 A Montrose EnvironmI2atpt656pafQ162 Exempt: Projects are limited in scale, have minimal adverse environmental effects, and include a number of municipal maintenance and operational activities. Some projects are exempt based on the results of an archaeological screening process or because of emergency response. These projects are pre -approved and may proceed to implementation without following the full Class EA planning process. Schedule B: These projects have the potential for some adverse environmental effects. The proponent is required to undertake a screening process (Phases 1 and 2), involving mandatory contact with directly affected public, Indigenous communities, and with relevant review agencies to ensure that they are aware of the project and that their concerns are addressed. If there are no outstanding concerns, then the proponent may proceed to implementation (Phase 5). At the end of Phase 2, a project report documenting the planning process followed through Phases 1 and 2 shall be finalized and made available for public and agency review. If the screening process raises a concern which cannot be resolved, a request may be made to the Ontario Ministry of the Environment, Conservation and Parks (MECP) for an order requiring a higher level of study or that conditions be imposed only on the grounds that the requested order may prevent, mitigate, or remedy adverse impacts on constitutionally protected Aboriginal and treaty rights. Alternatively, the proponent may elect voluntarily to plan the project as a Schedule C undertaking. Schedule C: These projects have the potential for significant adverse environmental effects and must proceed under the full planning and documentation (Phases 1 to 5) procedures specified in the Class EA document. Schedule C projects require that an ESR be prepared and filed for review by the public and review agencies. If concerns are raised that cannot be resolved, a Part II Order may be requested. 2.2.1 Schedule Selection For this study, Schedule B was considered applicable. This approach requires Phases 1 and 2 of the Municipal Class EA process to be addressed to satisfy the requirements for Schedule 'B' projects before proceeding with implementation (Phase 5). FIGURE 6Figure 6 illustrates the process followed in the planning and design of projects covered by Phases 1 and 2. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 18 A Montrose Environml2®t;ipt6fr_ n# 1162 Identify Identify alternative problemor solutions to opportunity problem or opportunity Inventory natural, social, and economic environment Identify impacts of alternative solutions on the environment, and mitigation measures Evaluate alternative solutions and identify recommended solutions Consult Review Agencies and Public I Select preferred I solution Project File placed on public record rNotice--A of Completior Schedule, 30 day rev period FIGURE 6 Class EA Process — Schedule B 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Complete drawings and documents Proceed to construction and operation Monitor for environmental provisions and commitments Public Contact Matrix Solutions Inc. 19 A Montrose Environm12ai;ipt6fr8pufQ162 Common Law and Riparian Rights Common Law in Ontario establishes that "water flows naturally and should be permitted to thus flow" (Cameron 1979, Ontario 1993, Government of Ontario 2022), which in common terms means that natural watercourses should not be impeded. The definition of a natural watercourse has varied over the years but is defined by the Government of Ontario as "a channel where water flows between banks that are more of less defined" (Government of Ontario 2022). Riparian rights concern landowners who own property fronting a natural watercourse. The rights of a riparian landowner include allowance to direct local drainage to the watercourse, regardless of downstream impacts, and the right to take water for domestic purposes. However, the riparian landowner cannot affect the natural conveyance of the watercourse. A riparian landowner must accept the natural flow from upstream riparian landowners regardless of the flood impacts. Altering the watercourse, such as damming a watercourse or redirecting flow, can make the riparian landowner liable for future damages. Beaver blockages and breaches, channel meandering, and erosion/sedimentation without human interaction are considered natural and are separate from riparian landowner liability. The removal or change to woody debris and beaver blockages through human interaction can also be classified as an alternation to a natural watercourse if it impacts other riparian landowners. Unless a watercourse is located within municipal property, municipalities, conservation authorities or the Ministry of Natural Resources and Forestry have no authority to remove blockages. Common Law and Riparian Rights of the public and private riparian landowners along Hidden Valley Creek will be considered. 2.4 Provincial Policy Statement (2020) The Province of Ontario is responsible for administering the Planning Act, 1990, as well as policy statements and plans related to a number of planning matters. In reviewing and assessing the existing and future conditions within the Scoped Study Area, it is essential to establish the provincial planning and policy context, considering both growth and sustainability objectives. The provincial policies that affect land uses within, and in proximity to the Scoped Study Area are summarized below. Given the scope and magnitude of the project, various provincial planning policy documents were reviewed 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 20 A Montrose EnvironmI2at;iDt6fr9pafQ162 with a focus on the sensitivities and their significance which could influence the generation and evaluation of the appropriate alternative solutions. The Planning Act is the Province of Ontario's legislated tool for ensuring that all land use planning throughout the province follows the same set of rules/guidelines. The Act outlines how decisions are to be made and the tools used to determine those decisions. Section 3 of the Planning Act grants the authority for the Government of Ontario to issue policy statements. The Planning Act requires that decisions affecting planning matters "shall be consistent with" policy statements issued under the Act. The most recent Provincial Policy Statement (PPS; MMAH 2020) came into effect on May 1, 2020. The 2020 PPS provides policy direction on matters of provincial interest related to land use planning and development and intends to protect resources, public health and safety and the quality of the natural and built environment. Though the PPS informs land use planning decisions under the Planning Act in Ontario and requires that infrastructure be provided in a coordinated, efficient, and cost-effective manner, it is complemented by other provincial plans such as the Oak Ridges Moraine Conservation Plan (MMA 2017), and Greenbelt Plan (MMAH 2017). However, these were determined to not apply to this project. The PPS recognizes the complex relationships between economic, environmental, and social factors in planning and embodies good planning principles. It includes enhanced policies on key issues that affect our communities, such as: • creating healthy and active communities by facilitating active transportation and community connectivity • the planning for, and protection of, corridors and rights-of-way for transportation infrastructure and transit to meet current and projected needs • providing safe, efficient, cost-effective, and reliable multimodal transportation systems that facilitate the movement of people, that are integrated with adjacent systems and that are appropriate to address projected needs • maintaining or restoring the diversity and connectivity of natural features in an area, and the long-term ecological function and biodiversity of natural heritage systems; 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 21 A Montrose EnvironmI2at;iDt6fa0pafQ162 and recognizing linkages between and among natural heritage features and areas, surface water features, and groundwater features • restricting development and site alteration in, or adjacent to, significant wetlands, woodlands, valleylands, wildlife habitat, and Areas of Natural and Scientific Interest (ANSI) in Southern Ontario (Ecoregions 6E and 7E), unless it has been demonstrated that there will be no negative effects on the natural features or their ecological functions • restricting development and site alteration in habitat of endangered or threatened species, except in accordance with provincial and federal requirements • restricting development and site alteration in or near sensitive surface or groundwater features such that their features and related hydrological functions will be protected, improved, or restored • protecting the overall health and safety of the population, including preparing for the impacts of a changing climate, and directing development away from areas of natural and human -made hazards • conserving heritage and significant cultural heritage landscapes The PPS focuses growth within settlement areas away from significant or sensitive resources and areas that may pose a risk to public health and safety. Furthermore, it recognizes that the wise use and management of resources may involve directing, promoting, or sustaining growth. It states that land uses must be carefully managed to accommodate appropriate development to meet the full range of current and future needs while achieving efficient development patterns. The PPS highlights the importance of protecting the overall health and safety of the population and directs development away from areas of natural and human -made hazards. It includes policies to protect the population from hazards such as flooding and encourages the consideration of the potential effects of climate change that may increase the risk associated with natural hazards. The policies generally direct development to occur outside of areas that are identified as hazardous lands. The PPS 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 22 A Montrose Environml2®t;iPt(5fo4pafQ162 does, however, provide for the implementation of Special Policy Areas, which allows for the continued viability of existing uses that were historically present within flood plains. A Place to Grow: Growth Plan for the Greater Golden Horseshoe (2019) The project is situated within the large regional area identified as the Greater Golden Horseshoe (GGH). On June 13, 2005, the Places to Grow Act received Royal Assent, providing a legal framework for the provincial government to designate any geographic area of the province as a growth plan area and to develop a growth plan in consultation with local officials and stakeholders (Ministry of Public Infrastructure Renewal [MPIR]; Government of Ontario 2006). The Act enables the government to plan for population growth, economic expansion, and the protection of the environment, agricultural lands and other valuable natural resources in a coordinated and strategic way within the GGH. Known as the Growth Plan for the Greater Golden Horseshoe (Government of Ontario 2006), the Plan provided direction and policies for where and how growth is to occur within the GGH. The Growth Plan (2006) provided a strategy for managing growth and urban sprawl in the GGH to 2031, and specified density and intensification targets that must be met by GGH municipalities in developing Official plans. The 2019 Growth Plan for the GGH was approved under the Places to Grow Act, 2005 to take effect on May 16, 2019. Known as "A Place to Grow," the new Plan builds upon the success of the initial Growth Plan (2006) and responds to the key challenges that the Region continues to face over the coming decades with enhanced policy directions. The Growth Plan (Government of Ontario 2019) was established by the Ontario government to provide a framework for municipalities to implement Ontario's vision for stronger communities and growth management throughout the GGH. The Growth Plan (2019) works in conjunction with other provincial policy and planning documents including the PPS 2020. The Growth Plan (2019) is intended to provide a framework for growth and development in the GGH that supports economic prosperity, protects the environment and helps communities achieve a high quality of life. Within the GGH, the Growth Plan (2019) provides that the applicable time horizon for land use planning is 2041. The goals and policies of the Growth Plan (2019) pertain to important issues such as transportation, infrastructure, land use planning, urban form, affordable housing, natural heritage, resource protection, and resiliency against climate 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 23 A Montrose Environml2at;ipt6fD2pafQ162 change. The Growth Plan (2019) recognizes the differences between cities, suburbs, towns and villages, and how these areas will grow alongside one another. Built up areas, Urban Growth Centres, transit corridors and stations are outlined as key areas to concentrate growth. In addition to outlining targets for growth, the Growth Plan (2019) prioritizes the protection of lands, features, and resources that are essential for long-term quality of life, economic prosperity, environmental health and ecological integrity of the Region. Included among these lands, features and resources to be protected are water resource systems and public open space. The Growth Plan (2019) focuses on the compact, sustainable growth of healthy complete communities, which offer a variety of housing options and encourage mixed- use development. However, public safety must be prioritized within these developments and future flood risks shall be prevented. Accordingly, growth shall generally be directed away from hazardous areas, including those that have been identified as Special Policy Areas in accordance with the PPS 2020. 2.6 Grand River Conservation Authority The GRCA regulates water and other natural resources within the Grand River watershed. For lands near or within watercourses, valleys, wetlands, or shorelines in the Grand River watershed, property owners, including the City of Kitchener, must obtain permission from the GRCA before beginning any development, site alteration, construction, or placement of fill within the area. Permits are also required for any wetland interference, or for altering, straightening, diverting or interfering in any way with the existing channel of a creek, stream or river. GRCA permits are required to complete any works along the Hidden Valley Creek which will impact the watercourse or wetland feature. City of Kitchener Planning Context The City of Kitchener's Hidden Valley Land Use Master Plan (2019) describes the anticipated development for the 183 -ha region. Areas contained within the bounds of Hidden Valley Road have works planned for the development of low-rise residential, 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 24 A Montrose EnvironmI2at;iDt6ffipafQ162 medium -rise residential, mixed-use, commercial, and high-rise residential land use. The extents of the proposed development are indicated in Figure 2. Development of the open space area within the subwatershed will have impacts on the hydrology and hydraulics of Hidden Valley Creek. The replacement of naturally pervious area with impervious area allows for less infiltration, transpiration, and attenuation of rainfall, which results in greater runoff volumes and higher peak flows. The effects of increased impervious area can be mitigated by using stormwater controls such as stormwater ponds and LID features. Stormwater ponds capture and slowly release runoff from a development catchment reducing flow rates. LID features such as grassy swales and pervious pavement allow greater initial infiltration of stormwater. Stormwater planning for the 2019 planned development is being carried out by Matrix under a separate cover and will work towards matching post -development flows to existing levels. The City of Kitchener is in the process of reviewing and replacing the Hidden Valley Land Use Master Plan for the Hidden Valley Community with a new Secondary Plan. The current study will be integrated with the Secondary Plan. The natural environmental features in this area have been identified in the Regional Official Plan as "Regionally Significant Core Environmental Features." Some of the land designations are subject to change through the City's ongoing Secondary Planning process. Species at Risk (SAR) and SAR habitat have been identified through that project. It is anticipated that recommendations from the current study will help inform the Secondary Plan policies and zoning, e.g., holding provisions which would limit development until appropriate infrastructure is finally designed and constructed. 2.8 Regional Planning Context 2.8.1 Waterloo Region Official Plan (2015) The Waterloo Region official plan is the Regional Municipality of Waterloo's guiding document for directing growth and change for the next 20 years. The Plan describes the infrastructural, environmental, and social goals for the Region. One of the key objectives (5.2) of the Official Plan is to: 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 25 A Montrose EnvironmI2atptpafQ162 "Plan and manage municipal drinking water supply systems using a comprehensive, integrated approach that reduces water demand, achieves efficiency of water use and protects, improves or restores the water quality and quantity." The MCEA process is not directly subject to Official Plan policies but these policies were used to provide information as it relates to natural features within the study area. Toward this goal, the planned development upstream of the Hidden Valley ESPA/PSW will be controlled using quantity and quality stormwater controls, such as stormwater ponds. Additionally, a roadway expansion and realignment project is underway along Hidden Valley Road and Wabanaki Drive, to the north and west of the Hidden Valley ESPA/PSW, respectively. This roadway expansion is in accordance with the Region's infrastructure development goals outlined in the Official Plan. The "River Road Extension" project is described in greater detail below. 2.8.2 River Road Extension Waterloo Region is in the process of designing a roadway extension of River Road which includes expansion and realignment of several roadways within the study area, namely, Wabanki Drive, Hidden Valley Road, and Goodrich Drive. The River Road Extension scope and detail is outlined in Class Environmental Assessment River Road Extension River Road Stormwater Report (Stantec 2013) and the planned stormwater strategy is described in River Road Extension Stormwater Management and Hydraulics Report (WSP 2021). The project will include a road extension, realignment, culvert replacement, and regrading of Hidden Valley through the proposed development, and a redirection of additional flow to the North Wabanaki Stormwater Pond. The implication of the proposed realignment is increased impervious area, to be compensated through the expansion of the North Wabanaki Stormwater Pond. Peak flow rates and volumes are to be controlled through a redesign of North Wabanaki Stormwater Pond to match existing volume and peak discharge rates of existing conditions. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 26 A Montrose Environml2®t;iPt6fffipafQ162 Climate Change MECP's guide "Consideration of Climate Change in Environmental Assessments in Ontario" was finalized in October 2017 (MOECC 2017). MECP requires that all Class EAs consider this within the scope of the project. Two approaches for consideration and addressing climate change in project planning include: • reducing a project's effect on climate change (climate change mitigation) • increasing the project's and local ecosystem's resilience to climate change (climate change adaptation) This guide was considered in the development and evaluation of alternatives. Climate change may cause the occurrence of larger and more frequent rainfall events. The Ontario PPS (refer to Section 2.4) recognizes that increased rainfall may lead to greater flooding, and it allows for municipalities and ministries to choose the most suitable approach to address this problem. The focus of this project is riverine flood mitigation and thus providing climate change resiliency to riverine flooding is the primary target. A flood remediation measure may be considered more favourable if it provides a greater resilience to these unanticipated future riverine flows. One of the key opportunities to be achieved through this project is to reduce flood risk. This will also provide resiliency to climate change for more frequent storm events. 2.10 Source Water Protection Section A.2.10.6 of the MEA Municipal Class EA document directs proponents, including the City of Kitchener to consider Source Water Protection (SWP) in the context of the Clean Water Act (CWA). Projects proposed within a vulnerable area are required to consider policies in the applicable Source Protection Plan (SPP), including their impact with respect to the project. A watershed based SPP contains policies to reduce existing and future threats to drinking water in order to safeguard human health through addressing activities that have the potential to impact municipal drinking water systems. The City of Kitchener is located within the Lake Erie Source Protection Region, specifically the Grand River Source Protection Area (Region of Waterloo 2022). The Grand River SPP contains policies that address current and potential threats to 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 27 A Montrose Environm12®t;iDt6ffipafQ162 municipal drinking water supply. There are three types of vulnerable areas covered by the SPP: • Intake protection zones (IPZs) —An IPZ is the area around a surface body of water where water is drawn in and conveyed for municipal drinking water. • Wellhead protection areas (WHPAs) — WHPAs are areas of land around a municipal well where land use activities have the greatest potential to affect the quality of water flowing into the well. • Issue Contributing Areas (ICAs) — An ICA is an area within a vulnerable area where activities could contribute to water quality issues. The study area is located within the Surface Water Intake Protection Zone 2 (IPZ-2) of the Region of Waterloo's raw water intake on the Grand River immediately downstream. The IPZ-2 has an assigned vulnerability score of 7.2 out of 10. The Wellhead Protection Area "D" (WHPA-D) for the Fountain Street wellfield also extends onto the east limits of the study area and has a vulnerability score of 2. The only Prescribed Drinking Water Threat (PDWT) within the IPZ-2 and WHPA-D areas within the study area relates to the application of road salt but given the vulnerability scores, this PDWT cannot be defined as a significant drinking water threat. Construction in areas identified in the SPP require a screening or permit from GRCA. It is acknowledged that the Region is currently completing a study that is, in part, reviewing and updating the WHPA zones for many wells and it is anticipated that the zone currently delineated may expand to encompass more of the study area. However, it is not anticipated that the vulnerability score will change to an extent where a significant drinking water threat could result. PUBLIC, INDIGENOUS, AND AGENCY CONSULTATION The involvement of the community — residents, agencies, stakeholders, Indigenous communities, and those who may be potentially affected by a project — is an integral part of the Class EA process. The purpose of the Class EA study consultation process is to provide an opportunity for stakeholder groups and the public to gain an understanding of the study process; contribute to the process for the development and selection of 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 2g A Montrose Environml2®t;ipti#Q162 alternatives; and provide feedback and advice at important stages in the Class EA process. Specifically, the objectives of the consultation effort are to: • Generate awareness of the project and provide opportunities for involvement throughout the planning process. • Facilitate constructive input from public and agency stakeholders at key points in the Class EA process, prior to decision-making. A summary of the consultation activities undertaken for this Class EA is provided in this section. 3.1 Notice of Commencement Public notices were issued throughout the course of the study to notify residents, agencies, stakeholders, and Indigenous communities of the status of the project and to invite feedback on the project. At the beginning of the study, a Notice of Study Commencement was mailed or emailed to review agencies, Indigenous communities, and individual properties within the study area. The notice was also advertised on the City of Kitchener website at the address https://www.engagewr.ca/hidden-valley-flood-ea (the Notice of Study Commencement was originally posted to www.l<itchener.ca/hiddenvalley). The notice presented an overview of the project and study area. Indigenous Consultation The Notice of Commencement was mailed to Nation Huronne-Wendat (HW), Mississaugas of the Credit First Nation (MCFN), and Six Nations of the Grand River (SNGR). Acknowledgement of the notice was received from MCFN, and SNGR. City staff held meetings with the SNGR and MCFN to present the Notice of Commencement. The Notice of Commencement was presented to SNGR on June 15, 2023, and presented to the MCFN on June 23, 2023. At these meetings City staff presented this project along with other ongoing initiatives within the City. The meetings also involved discussions on incorporating Indigenous knowledge into the EA process, such as integrating Rights - holder priorities and values with respect to the land and the waters into the evaluation criteria for selecting the preferred solution. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 29 A Montrose EnvironmI2atpt6fr8pafQ162 City of Kitchener staff held a second set of meetings with SNGR and MCFN to present alternative solutions and gather feedback on which solution is preferred, and to discuss how each Nation's priorities and values and have been incorporated into the evaluation criteria. These meetings were held with MCFN on September 25, 2023, and with SNGR on September 29, 2023. City staff presented a summary of this project including background and alternatives. Feedback was gathered from both MCFN and SNGR. A copy of the presentation and meeting minutes from each of these meetings are included in Appendix A. 3.3 Public Consultation 3.3.1 Public Information Centre A Public Information Centre (PIC) was held on October 12, 2023, from 5:00 p.m. to 8:00 p.m. at the Centreville Chicopee Community Centre. Notice of the PIC was mailed to local property owners, posted on the City's website, and published in the Kitchener Record on September 29, 2023. A copy of this notice is included in Appendix A. The PIC provided attendees with information regarding: • Background information regarding this study • Municipal Class EA process • Problem and Opportunity Statement • An overview of work completed to date • Description of the alternative solutions • Proposed evaluation criteria for alternative solutions The PIC was held in an open house format. The PIC was attended by approximately 11 local residents and their consultants, in addition to City and Matrix staff. Oen comment sheet was received. Materials from PIC #1 are included in Appendix A, including the poster boards, sign -in sheet, and comment sheets. The majority of the questions and comments received during the open house were clarifications related to the project or technical questions. There was some concern regarding property or easement impacts downstream of Hidden Valley Road. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 3o A Montrose EnvironmI2atpt6ffipafQ162 3.3.2 Project Specific Website The City created a project specific website through its Engage Kitchener online platform. The website https://www.engagewr.ca/hidden-valley-flood-ea included copies of project notices and the presentation boards from the PIC. It also included project background, a newsfeed, and a 'live' timeline of the project status. A public question board is included with answers provided by the project team. Copies of the newsfeed and question board, at the time of publishing, are provided in Appendix A. 3.3.3 Project Specific Email Address The City created a project specific email address to collect correspondence related to this study. The email address, hiddenvalley@kitchener.ca, was posted in notices and on the project specific website. Correspondence received through this email address is included in Appendix A. 3.4 Agency Consultation Similar to the above notification process, review agencies were also contacted throughout the study. The following provides a summary of consultations with responding agencies. 3.4.1 Grand River Conservation Authority Matrix and the City had open communication and dialogue with GRCA throughout the project, as well as a formal meeting on June 14, 2023. Early in the project, consultation with GRCA was undertaken to seek input on hydrologic methods and approach, hydraulic modelling updates, and natural heritage considerations. 3.4.2 Kitchener Climate Change and Environment Committee Project staff presented the summary of the project to the City of Kitchener's Climate Change and Environment Committee on October 19, 2023. The meeting minutes indicate that the Climate Change and Environment Committee supports the preferred alternative solution for flood risk reduction in the Hidden Valley. Staff report and meeting minutes are provided in Appendix A. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 31 A Montrose EnvironmI2atpt63MpafQ162 Landowner Consultation The following are a list of key landowner stakeholders within the study area: • Pearl Valley Development Corporation (Pearl Valley) • Owners of 691— 748 Hidden Valley Road Each of these landowners was personally emailed a copy of the project notices. Correspondence with these landowners is provided in Appendix A. The Hidden Valley ESPA/PSW and the proposed development properties are within the lands owned by Pearl Valley. The Hidden Valley ESPA/PSW was investigated by Matrix on September 27, 2023, under the approval of Peal Valley. Observations are described in Section 4.1. There are four properties downstream of the Hidden Valley ESPA/PSW which have expressed flood and erosion concerns in the past: 691, 730, 735, and 748 Hidden Valley Road. 691 and 735 Hidden Valley Road, upstream of the Hidden Valley Road crossing, were accessed on September 27, 2023. 3.6 Notice of Completion To complete the Schedule B process, a Notice of Completion will be issued to Indigenous communities, review agencies, and the public and a period of at least 30 calendar days shall be allowed for comment and input. Following the adoption of this report by City Council, a Notice of Completion will be posted online, in the newspaper, and mailed to the stakeholder list advising that the project had been filed for the 30 -day review period. The notice will invite interested parties to submit comments to the City within 30 calendar days of posting. 4 EXISTING CONDITIONS Field Investigation Site walks were undertaken on April 18, 2023, at Hidden Valley Road and through the upstream property at 735 Hidden Valley Road, and on September 9, 2023, throughout the whole study area. The thorough field investigation on September 9, 2023, 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 32 A Montrose EnvironmI2atJA6 YrApfQ162 investigated the Hidden Valley ESPA/PSW, North Wabanki Pond, and the North, West, and East Hidden Valley Creek Tributaries. Site photographs can be found in Appendix B. A summary of the findings is provided below. The north and west tributaries to Hidden Valley Creek drain towards the Hidden Valley ESPA/PSW. Both watercourses are consistently shallow, with a bank height of 0.5 to 1.5 m, and a wide floodplain of tall grass. Minor erosion was noted along both tributaries but is of minimal concern because of the heavily vegetated banks. A large beaver dam structure was noted in the field (Figure 7) with an approximate height of 2 m. The dam structure is comprised of woody material overlain with thick sedimentation. It is unknown when this dam was constructed. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 33 A Montrose Environml2®t;iDt6 3i2pafQ162 The east Hidden Valley Creek, which outlets from the Hidden ESPA/PSW, showed signs of greater erosion. The east Hidden Valley Creek runs through a heavily forested reach upstream of the properties at 691 and 735 Hidden Valley Road. There is a crossing with a circular concrete culvert located upstream of 735 Hidden Valley Road, which was described by the landowner of 691 Hidden Valley Road as rebuilt following a flooding event in the mid -2010s. Downstream of the driveway to 735 Hidden Valley Road is signs of significant erosion and undercutting along the left bank. The banks are topped by mowed grass which do not have significant root depths to reinforce the slopes. Photographs 1 to 4 show the existing Hidden Valley Road crossing. The Hidden Valley Road crossing contains two culverts, a 600 mm diameter circular CSP conveying low flows, and a raised 900 mm diameter circular CSP to convey higher flow events. Rehabilitation works commenced in September 2013, following the road overtopping, to rebuild the crossing and widen the roadway. As part of the rehabilitation works, both culverts were extended and made to confluence at approximately % the length of the existing road. The rebuilt design of Hidden Valley Road is shown in Appendix C (WalterFedy 2013). The low flow 600 mm diameter culvert at Hidden Valley Road was observed to be heavily blocked by sediment during the survey. As can be seen in Photograph 2, the low flow culvert was not visible beneath the sediment directly upstream of the crossing. Water was observed to be flowing under the armour stone headwall and can be seen to emerge from the 600 mm pipe at the under -road confluence (Photograph 3), which indicates that the 600 mm culvert is not entirely blocked. The heavy sedimentation upstream of the crossing and blockage of the 600 mm culvert is speculated to be related to the erosion noted downstream of the 735 Hidden Valley driveway. The soil eroded from the banks upstream have likely settled at the inlet of the Hidden Valley Road crossing where flow is constricted and slowed. Continuous subsurface flow was observed to emerge from the ground both upstream and downstream of Hidden Valley Road. The majority of baseflow into the culvert during the survey date originated from a subsurface source upstream of Hidden Valley Road (Photograph 4), but the origin of this flow is not certain. The volume and rate of water resulting from this source do not impair the high flow capacity of the crossing. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 35 A Montrose Environml2®t;iPt(5:7Apaf 1162 Photograph 1: Upstream view of Hidden Valley Road Culverts. The low flow culvert cannot be seen below the sediment. Photograph 3: View of pipe confluence under Hidden Valley Road. 4.2 Photograph 2: Downstream view of the Hidden Valley Road culverts. Both culverts converge under the roadway so only a single pipe outlets downstream. y y� l '+ '.r r Photograph 4: Flow from under asphalt, upstream of Hidden Valley Road. The Hidden Valley Road culvert and upstream channel was surveyed by Matrix on September 9, 2023. The survey extended from approximately 15 m downstream of 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 36 A Montrose Environml2at;ipt(5:7r5pafQ162 Hidden Valley Road to 31 m upstream of the driveway crossing at 735 Hidden Valley Road. The survey also assessed the dimensions and conditions of the culvert crossings and erosion extents. Figure 8 presents the limits of the survey. Flood Risk Flood risk is the combination of flood hazard — determined by depth and velocity of flow — and vulnerability — determined based on land use and potential for impact. The lands upstream of the Hidden Valley ESPA/PSW are undeveloped and contain natural wetland, thus they have little vulnerability to flooding. There is a small portion of the Hidden Valley North Creek which runs parallel to a commercial development south of King Street East for approximately 70 m, which could be considered vulnerable. However, this is in the headwater of the catchment and is contained within the 2.5 m deep channel for the 1:2 -year through Regulatory events, according to the detailed InfoSWMM model developed by WalterFedy (2015) and updated by Wood (2019). The only area of flood vulnerability within the study area is located downstream of the Hidden Valley EPSA/PSW, adjacent to Hidden Valley Road. The flood risk within the study area was assessed for this area along Hidden Valley Road. The study area is within GRCA's estimated floodplain of Hidden Valley Creek, but outside the regulatory floodplain of the Grand River. The water surface elevations of the Grand River do not typically impact the hydraulics of Hidden Valley Creek. The flood risk within the study area, downstream of the Hidden Valley ESPA/PSW and upstream of the Grand River, is analyzed as the intersection of flood hazard of Hidden Valley Creek and the vulnerability of the properties around Hidden Valley Road. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 37 A Montrose Environml2®tiPt63i6pafQ162 v C,4 Jd N L E4 w °^ 1y E � O vo VJu n � s `3E� N — E C w 0 vy/ w Y LL i .�O CO p N ch LO � G a c > m Z 9 O O Qp O O OHO� - Ess su oar asp oar sz� oar ao� oar s�o oar A � r A HIDDEN VALLEY RD `ir � r L' Y A � h i J .} A � su oar os� oar SULOW oo� oar s�o oar (w) 6u141JON 4.3.1 Hydrology 4.3.1.1 Flow Monitoring Analysis Flow monitoring data at three sites was collected between 2011 and 2017. The sites are located at Hidden Valley Road downstream of the wetland (SW1), the west tributary upstream of the wetland (SW2), and the northern tributary upstream of the wetland (SW3). See Appendix D for a reference map of monitoring locations. Flow monitoring data was collected by the following: TABLE 1 Flow Monitoring Data Collection Periods Consultant Data Collection Period Sta ntec 2011-2017 WalterFedy 2014 Wood 2017 Matrix attempted to quantify an input-output relationship for the wetland based on the flow monitoring data. A consistent inflow -outflow relationship could not be found due to differences in initial storage levels within the wetland and complex surface water and groundwater relationships. Flow recorded at monitoring station SW1 was generally inconsistent with precipitation events and did not consistently align with peak flows at SW2 and SW3. 4.3.1.2 Flow Rates As summarized in Section 2.1, previous studies aimed to develop a calibrated hydrologic model for Hidden Valley Creek based on the flow monitoring data. These projects were challenged due to the complexities of the ESPA/PSW. The wetland is a complex attenuation feature, which has historically been difficult to calibrate. Accurate calibration of the wetland within a hydrologic model would require intensive groundwater modelling as well as detailed survey inspection of the area for each flow event. Access and time constraints limit the project team's ability to carry out a detailed groundwater -surface investigation into the wetland's complex hydrology. Additionally, the hydrologic model does not account for groundwater recharge/discharge and is not able to capture a dam break event. Therefore, further hydrologic modelling to estimate flows downstream of the wetland was not pursued. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 39 A Montrose Environml2atpt6 3d8#Q162 Following discussions with the City and GRCA, it was determined that a statistical approach based on the monitored data is appropriate for the hydrologic assessment for this project. The flow monitoring data was used to perform a flood frequency analysis (FFA) to statistically estimate the peak flow rates at Hidden Valley Road from the monitored data. The flood frequency provides an advantage in that it uses observed peak flow measurements, which includes flow from groundwater discharge and dam breaks, to assess the empirical frequency of return period peak flows. However, as the available data set has a limited range of approximately 10 years, only flows up to the 1:50 -year return period event can be estimated with reasonable confidence. Monitored data included primarily water depths, with some flow measurements during low flow. Stantec was not able to perform in -field measurements of the flow rate at Hidden Valley Road during high flow events (above a water surface elevation of 290.86 m). Matrix developed a rating curve using known road overtopping and pipe flow relationships with upstream water depth. A site-specific model was created using PCSWMM software to relate water surface elevations upstream of Hidden Valley Road to flow through the road crossing. The rating curves were developed based on the surveyed conditions, including a 90% blockage of the 600 mm low flow culvert to represent existing conditions. The rating curve is provided in Appendix C. The surveyed crossing dimensions are shown in Table 2. TABLE 2 Crossing Dimensions Diameter Upstream invert (m) Downstream Invert (m) Overflow I Low Flow I Overflow I Low Flow 900 mm 290.77 1 287.314 1 600 mm Two 1,450 mm 770 mm span by 870 mm rise 289.94 294.686 293.74 287.314 294.01 1, 292.88 Matrix completed a FFA using the calculated flows from the 10 -year monitoring dataset. The analysis was conducted across seven statistical distributions and evaluated 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 4o A Montrose Environml2®t;iPt(5:7r9pafQ162 according to best -fit measures. The Log Person Type 3 distribution (WRC) was determined to provide the greatest fit for the data. Table 3 presents the resulting 1:2 -year through 1:50 -year peak flow rates. Storms above the 1:50 -year frequency cannot be confidently extrapolated from 10 years of data. TABLE 3 Peak Flow Rates 4.3.2 Hydraulics Matrix adopted and modified the Hidden Valley Creek hydraulic model provided by the City (WalterFedy 2014) for the flood risk analysis. Matrix updated the model based on in -field survey. Cross-sections 1 to 171, as shown in Figure 9, were updated based on 2023 survey data. Road crest elevations, and pipe inverts and dimensions were also updated to reflect existing conditions at both Hidden Valley Road and the 735 Hidden Valley Road driveway. The extent of the model is shown in Figure 9. Matrix updated the HEC -RAS model at the Hidden Valley Road crossing to better represent the complex culvert structure, using the rating curve developed in PCSWMM described in Section 4.3.1.2. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 41 A Montrose Environml2atpt6ROpafQ162 4.3.2.1 Hidden Valley Road Hydraulic Capacity Assessment The HEC -RAS model was used to assess the existing roadway configuration and the existing driveway configuration. Hidden Valley Road is classified as a local street according to the City's GIS data (I<itchener 2024), and as such has been assessed considering the required design criteria for a local road classification. The City of Kitchener Development Manual (2021) specifies that waterway openings for culverts and bridges be designed in accordance with MTO standards. Table 4 summarizes the design criteria for Hidden Valley Road as per the MTO Highway Drainage Design Standards (2008). The Design Freeboard is measured from the water surface upstream of the crossing, as generated by the Design Flow, to the edge of the pavement of the roadway. The Headwater/Diameter Ratio is measured as the depth of water upstream divided by the culvert diameter; in this case the lower 600 mm culvert was used. TABLE 4 Design Criteria for Hidden Valley Road Design Flow Return Period 1:10 -Year (Local Road) for a Span less than 6.0 m WC -1 Design Flow Design Greater or Equal to 0.3 m Measured from WC -7 Culvert Freeboard High Water Line to Low Edge of Pavement Crossings on a Elevation Watercourse Section 3.2 WC-7Culvert Headwater/ HW/D Less than or Equal to 1.5 Diameter Ratio Crossings ona Watercourse Section 3.5 Table 5 presents the results for Hidden Valley Road. Under existing conditions, the Hidden Valley Road culverts do not meet the Design Freeboard or the headwater/diameter (HW/D) ratio criteria. The roadway is overtopped for the 1:10 -year through 1:50 -year flows. The maximum road overtopping depth is 0.97 m during the 1:50 -year flow. The hydraulic profile for the 1:2 -year through 1:50 -year flows is shown in Figure 10. The flood extents for the 1:2 -year through 1:50 -year flows are contained within the stream corridor downstream of Hidden Valley Road. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 43 A Montrose Environml2at;iPt6ffipafQ162 TABLE 5 Existing Conditions Hydraulic Results for Hidden Valley Road 900 mm diameter 1.68 Circular CSP and 600 mm diameter Circular CSP (blocked to 90% of depth) _ Notes: Bold values indicate criteria not met. HW/D = Headwater elevation over Diameter Juu 298 296 E 294 c 0 m W 292 290 288 286 Main Channel Distance (m) FIGURE 10 Hydraulic Profile — Existing Conditions 10 Legend WS 50 yr WS 10 yr WS 20 yr WS 5 yr WS 2 yr Ground Set WS 4.3.2.2 Hydraulics at Upstream Property Flows equal to or greater than the 1:20 year flow spill out of the corridor upstream of the 735 Hidden Valley Road driveway due to the hydraulic restriction of the driveway culverts. The water surface elevation at 735 Hidden Valley Road resulting from the 1:20- 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 44 A Montrose Environm12®t;iPt6ffipafQ162 year flow is above the surveyed basement elevation (295.70 m). The wooded lands directly upstream of Hidden Valley Road are flooded during 1:20 -year event due to the hydraulic restriction of the roadway culverts. However, the backwater effect from the Hidden Valley Road culvert does not impact the building at 735 Hidden Valley Road for any flows up to and including the 1:50 -year flow, as the top of road elevation is lower than the ground elevation at the building. 4.4 Natural Environment In compliment to the EA, a natural heritage document was prepared by Matrix to investigate and highlight the natural environmental features within the study area. Matrix staff conducted a brief reconnaissance site visit on September 27, 2023. Where Matrix had permission to access lands, a rapid vegetation assessment and a preliminary plant list was completed. Matrix walked the northern, central, and eastern portions of the study area, focusing on those areas that have been proposed to be impacted by the flood risk reduction EA and the stormwater management strategy. The full Natural Heritage Report can be found in Appendix E. Below is a summary of the findings. 4.4.1 Identified Features The following natural heritage features, as identified in the City of Kitchener Official Plan and the Region of Waterloo Official Plan, have been identified within the study area: • Environmentally Sensitive Policy Area: ESPA 27 Hidden Valley and ESPA 28 Petrifying Spring • Locally Significant Valleylands: Along Hidden Valley Creek and Hofstetter Creek • Provincially Significant Wetland: Hidden Valley Provincially Significant Wetland Complex • Regionally and Locally Significant Woodlands: Along Hidden Valley Creek, extending north to Highway 8 The large PSW located within the central portion of the study area is approximately 19 ha in size and contains both swamp and marsh habitat types. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 45 A Montrose EnvironmI2atpt62ApafQ162 4.4.2 Aquatic Habitat and Fisheries The study area contains three watercourses, the Grand River, Hofstetter Creek, and Hidden Valley Creek (North, East, and West). The Grand River and its tributaries are considered warmwater fish habitat. Extensive fish records are available within the Grand River, but there is no documented evidence of fish within Hidden Valley Creek. Within the Grand River, critical habitat for Black Redhorse and Silver Shiner has been identified by Fisheries and Oceans Canada (DFO). Any work within proximity to either watercourse would require a request for review from the DFO. The Hidden Valley East Creek empties into the Grand River approximately 140 m downstream of the Hidden Valley Road Culvert. Although no fish were observed in the area surrounding the culvert, the area immediately downstream of the culvert is functionally connected to the Grand River and may support fish and fish habitat. The existing Hidden Valley culvert is heavily sedimented, with the low flow culvert being almost entirely buried. The condition of the culvert reduces the conveyance of the crossing and is currently a complete barrier to fish passage. Due to the presence of a restricted species and its critical habitat, upstream of the Hidden Valley culvert that could be impacted by the presence of fish the introduction of fish into this system is not recommended. A seep is present immediately upstream of the Hidden Valley Road culvert, which appears to be originating from the southwest. Seeps are natural areas where there is shallow groundwater movement, which eventually rises to the surface through a porous substrate and contributes to the surface water features. Seeps provide an important contribution to the overall ecological function by providing habitat and a hydrological function of headwaters, recharge areas, and discharge areas within natural heritage systems. 4.4.3 Vegetation Communities and Plants A total of 54 vegetation communities were identified within the study area by Matrix, LGL, and others. Fifty-three of these community types are both common and secure within Ontario. One rare vegetation community was observed within the study area by LGL (2023), a TPO1-1 Dry Tallgrass Prairie Type. No rare plant communities, SAR, Species of Conservation Concern (SCC), or locally rare plants were identified within the area 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 46 A Montrose Environml2®t;iPt61a5pafQ162 surrounding the Hidden Valley Road culvert. A full list of vegetation communities can be found in the full Natural Heritage Report (Appendix Q. 4.4.4 Wildlife Based on the background review, records for a total of 141 insect, 46 mammal, 173 bird, 71 fish, 6 mussel, and 24 reptile and amphibian species were noted to occur within the overall study area. Most of these species are common and secure within Ontario, though 24 SAR and 10 SCC have been identified as well. A full list of species can be found in the full Natural Heritage Report. 4.4.5 Significant Wildlife Habitat The study area has the potential to contain candidate or confirmed Significant Wildlife Habitat (SWH) types, including habitat for SAR and SCC. • Seasonal Concentration Areas of Animals: areas where wildlife species occur annually in aggregations at certain times. • Rare Vegetation Communities: contain rare plant species communities. • Specialized Habitats for Wildlife Considered SWH: contain rare habitats that wildlife populations depend on, especially for breeding and nesting. • Habitats of SCC Considered SWH: includes SCC species, species that are locally or regionally rare and are declining, or other species with conservation concerns. • Animal Movement Corridors: corridors that allow the movement of wildlife from one habitat type to another. Using data from the background review and field visit, the SWH criteria were evaluated and 18 SWH types have potential to be present within the study area. 4.5 Social and Economic Environment The social and economic sectors of the study area can be broken into two regions: upstream of the Hidden Valley ESPA/PSW and downstream of the Hidden Valley ESPA/PSW. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 47 A Montrose Environml2at;iPt6ffipafQ162 Upstream of the Hidden Valley ESPA/PSW there is planned development on property owned by Pearl Valley. The full extent and land use of the development can be seen in Figure 2. Development is planned along Hidden Valley Road and Wabanaki Drive, with stormwater facilities planned to control peak flow rates to match existing conditions. The proposed developments are not expected to change the flood risk conditions within the study area. Downstream of the Hidden Valley ESPA/PSW there are several residential properties which lie adjacent to Hidden Valley Creek. There are concerns raised about flooding and erosion within this reach which has potential to impact the social and economic wellbeing of these property owners. The Hidden Valley ESPA/PSW is not a public social feature, with no formal trails. During the investigation in September 2023, informal trails were noted along the south Hidden Valley Road leading into the Hidden Valley ESPA/PSW. These trails are not maintained and could be considered hazardous. The natural feature and informal trails are within the Pearl Valley lands and are thus privately owned and closed to the public. 4.6 Infrastructure and Utilities Access to the study area is limited because the Hidden Valley ESPA/PSW and upstream development lands are privately owned. The proposed development lands and Hidden Valley ESPA/PSW are owned by Peal Valley. Flood hazard mitigation strategies within these lands should be coordinated with the land-owning stakeholders. Additionally, there are several crossings downstream of the Hidden Valley ESPA/PSW which are privately owned. The City does not have jurisdiction over the privately owned crossings. Hidden Valley Creek at Hidden Valley Road is accessible from both the north and south, as the roadway circles around Wabanaki Drive. Access to properties around the Hidden Valley Creek crossing should not be impaired during roadworks, as detours to the north and south are available. There are no storm, sanitary or water main pipes restricting culvert design at this crossing. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 4g A Montrose Environml2at;ipt6fl,'�#Q162 DEVELOPMENT OF ALTERNATIVE SOLUTIONS A series of alternatives have been developed for reducing flood and erosion risk in the Hidden Valley Road area and for supporting future development in the Hidden Valley community. 5.1 Alternative 1: Do -Nothing Alternative 1 proposes a Do -Nothing scenario in which no changes are made. This scenario represents the most inexpensive solution, as there are no additional capital expenditures. Flood risk downstream of the wetland would remain as is. Alternative 2: Reduce Flows Upstream of Wetland Alternative 2 proposes that flow be attenuated upstream of the Hidden Valley ESPA/PSW using oversized stormwater controls. Several new developments are currently proposed upstream of the Hidden Valley ESPA/PSW with suggested outlet and source controls (see Section 4.5). While it is conventional to control flow rates and volumes from proposed new developments to match existing conditions, controlling the flows to lower than existing conditions may reduce flood risk downstream. Alternative 3: Flow Control Structure in Wetland Alternative 3 proposes constructing a flow control structure, such as a dam, within the Hidden Valley ESPA/PSW to provide engineered attenuation within the wetland. Under existing conditions, it is speculated that flooding downstream of the wetland is a result of beaver dam failures several times in the past decade. A constructed dam downstream of the existing beaver dam would preserve the current conditions of the wetland while increasing the reliability of attenuation. Engineered attenuation within the wetland would reduce the risks associated with failing beaver dams and mitigate the resulting flood risk. Currently, the Hidden Valley ESPA/PSW lands are owned by Peal Valley. Within Ontario, riparian landowners are entitled to drain to and use water features within their property, but cannot dam or interfere with the feature in ways which will detriment downstream properties. Consultation with the GRCA and Ministry of Natural Resources 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 49 A Montrose Environml2atpt6ffipafQ162 and Forestry would be required to approve plans for such works within a natural watercourse, such as Hidden Valley Creek and the Hidden Valley ESPA/PSW. 5E4 Alternative 4: Conveyance Improvements Downstream of the Wetland Alternative 4 proposes increasing the conveyance capacity downstream of the Hidden Valley ESPA/PSW. Increasing conveyance at Hidden Valley Road would lower the water surface elevation upstream of the road and reduce the frequency of road overtopping. A reduction in roadway overtopping would also reduce erosion potential and improve long-term slope stability on both sides of Hidden Valley Road. Conveyance improvements through private properties adjacent to Hidden Valley Road have not been considered as part of this alternative because works on private property are not within the City's jurisdiction. Erosion control and channel banks stabilization downstream of the 735 Hidden Valley Road driveway and upstream of Hidden Valley Road are also considered. Erosion control measures would reduce the sedimentation of the Hidden Valley Road culvert and provide greater bank stability within the City's right-of-way. 6 EVALUATION CRITERIA AND METHODOLOGY The project team selected the following three categories for the evaluation of the alternative solutions: • Technical Environment • Cultural/Social Environment • Natural Environment Matrix considered each alternative's potential for benefits and negative impact towards each environmental category. Details of the aspects considered within each category are provided below. Figure 11 provides a visual representation of the considerations within the three environmental categories. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 5o A Montrose Environml2at;iPt6ffipafQ162 Aquatic Environment -Fish and fish habitat ■Surface water quality/ quantity ■Groundwater ualit c uantit Terrestrial Environment ,Wetland ecology ■Wildlife/habitat ,Vegetation ■Trees or landscape Climate Change ,Resilience to severe weather (flooding) -Known climate change contributors Constructabi lits/Feasibility ■Construction duration -Channel functionality during construction ■Soil conditions ■Groundwater control Cultural Environment ■Archaeological impacts ■Built heritage -Cultural landscapes/ Natural Cultural / Socio -Economic Environment Environment Technical Environment Approvability ■Agency and utility permits -Existing/future designated land use ■Municipal planning policies FIGURE 11 Evaluation Criteria 6.1 Technical Environment Social Environment ■Property impacts -Recreational opportunities ■Maintaining / improving greenspace -Safety of pedestrians, cyclists, and trail users ■Disruption to traffic, businesses, residents during/post-construction -Noise to sensitive areas Economic Environment -Relative capital costs -Operation and maintenance costs ■Internal / External funding sources -Cost of flood damage -Property impacts Functionality -Flood risk -Erosion risk ■Flexibility to meet future needs The Technical Environment focuses on the alternative solution's ability to meet the project objectives. For this project, the functionality of the alternative was assessed through consideration of the alternative's potential to reduce flood risk and erosion risk within the study area. Also considered as part of functionality is the alternative's flexibility to meet future needs. Future needs could arise from changes in climate, land use, or other changes in the area. The Technical Environment also includes the approvability, and constructability or feasibility of each alternative. The approvability includes considerations for municipal planning policies, coordination with existing and future designated land uses, and the potential requirements for agency and utility permits. The constructability and feasibility of an alterative includes consideration for things such as physical constraints such as topography or dimensions, construction duration, utility conflicts, channel function during construction, soil conditions and groundwater control. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 51 A Montrose Environm12®tpt6SI,6pafQ162 Cultural/Social Environment The cultural and social environment focuses on impacts to people and places of social and cultural relevance. Impacts to locations which are of social or cultural significance are evaluated, such as archaeological sites, built heritage, private properties, greenspace, and recreation facilities. Impacts to the social wellbeing and safety of residents are also considered. Intangible factors such as noise disturbances due to construction, traffic disruptions, and temporary closures of public amenities impact the social environment. Safety concerns are assessed with greater consideration. Economic impacts are also associated with the cultural and social environment. Relative capital costs of projects, operation and maintenance costs, flooding damages, and funding sources are considered in the evaluation of alternatives. Costs of a project are weighed against benefits, such as cost savings from the prevention of flooding damages, to provide a wholistic evaluation. 6.3 Natural Environment The Natural Environment focuses on impacts to the ecology of the area. The ecologic analysis is broken into both the aquatic and terrestrial environments. The aquatic environment includes consideration for fish and fish habitat, surface water quality, and groundwater quality. The study area includes a large ecologically significant and complex water feature, which increases the severity of environmental consideration. The long-term impacts towards water features, including the wetland and watercourses, as well as short term impacts during construction and operation and maintenance are considered. The terrestrial environment includes both vegetative and wildlife communities in and around the study area. Wetland ecology, wildlife habitat, and tree/vegetation health are considered with respect to the short-term and long-term impacts of the proposed alternatives. Climate change resilience is also considered when assessing the natural environment. The impacts of severe weather towards the study area, such as flooding, are assessed 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 52 A Montrose EnvironmI2at;Z&6R$pafQ162 with consideration of a changing climate. The evaluation also favours proactive mitigation, prioritizing alternatives which maintain or reduce the known climate change contributors. EVALUATION OF ALTERNATIVES In this section each alternative is described in detail with respect to considerations for each of the evaluation criteria. A summary of the evaluation is provided in Section 7.5. 7.1 Alternative 1 Technical Environment Alternative 1 is a Do -Nothing scenario. Under Alternative 1, the flood and erosion hazard downstream of the Hidden Valley ESPA/PSW would remain unchanged and Hidden Valley Road would continue to overtop with a frequency of approximately once in 10 years. The erosion noted near Hidden Valley Road downstream of the wetland is likely to continue in the future, which will further increase sedimentation of the Hidden Valley culverts and reduce conveyance capacity. The approvability and constructability of Alternative 1 is the highest ranked of all alternatives, as it is it the easiest to implement due to its simplistic nature. Under existing conditions Hidden Valley Road is overtopped during the 1:10 -year flow and a single property is flooded downstream of the wetland during the 1:20 -year event. It is speculated that the prior flood instances downstream of the wetland were the result of beaver dam failure within the wetland. With Alternative 1 beaver dams within the wetland will remain at potential risk for failure. Cultural and Social -Economic Environment From a cultural and social -economic perspective, there will be no additional cultural or economic impacts, but the social impact of flooding and erosion around Hidden Valley Road will continue. Alternative 1 does not require any immediate capital costs for the City. However, the existing sedimentation and road overtopping potential at Hidden Valley Road will remain. These will require ongoing maintenance and potentially repair costs for the City. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 53 A Montrose EnvironmI2at;ipt692pafQ162 Natural Environment There will be no change to the Natural environment under Alternative 1. The risk of erosion related to overtopping of Hidden Valley Road will continue. Floods overtopping the road have potential to erode the road embankment and the valley wall with potential damages to existing vegetation and sedimentation in the creek. The existing culvert structure acts as a complete barrier to fish passage, providing protections to the population of a restricted species and its critical habitat upstream. 7.2 Alternative 2 Technical Environment Alternative 2 is to overcontrol flows upstream of the Hidden Valley ESPA/PSW to reduce peak flow rates downstream. Approvals for the additional stormwater control measures in the proposed development lands could be provided through the planning process and could be agreed upon through cost sharing measures by the City and the developer (Pearl Valley). This alternative is not expected to have a significant impact on reducing flows near Hidden Valley Road because the wetland complex already provides significant attenuation and flows are not driven strictly by a direct input and output response. The Hidden Valley ESPA/PSW provides between 9,000 to 14,600 m3 of surface storage, granting greater peak flow attenuation than even an oversized stormwater management pond could provide. Although it is difficult to quantify due to the complexities of the wetland feature, the presence of the beaver dam and standing water below the dam elevation indicates that the wetland currently provides significant attenuation. The flow monitoring data indicates that peak flows downstream of the wetland are not driven solely by inputs to the wetland, but also by groundwater discharge and potential collapses in the beaver dam structures. Reduction in flow to the wetland would not affect the potential for beaver dam collapses, and thus would not guarantee a reduction in flood hazard downstream. Therefore, Alternative 2 is not preferred within the technical environment. Cultural and Social -Economic Environment The additional stormwater controls would require an archaeological assessment as they would be constructed on undeveloped lands. However, the locations for the proposed 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 54 A Montrose Environmi2at;ipt69S#Q162 controls are within the proposed development lands and will require an assessment regardless, so the required archaeology assessments would be minimal additional effort. The upsizing of the proposed stormwater controls or placement of new stormwater controls would reduce the available area for property development, reducing the total effective developable land. The area impacted by this alternative will be dependent on the degree of additional attenuation provided by the facilities. The cost of the additional stormwater controls could be integrated into the development planning and financed through cost sharing programs. Therefore, the overall impact relative to the total development costs could be minimal. Ongoing costs for Alternative 2 include operation and maintenance of the additional area and volume in the stormwater management facilities. Additionally, if the flows at Hidden Valley Road are not reduced, the existing sedimentation and road overtopping potential at Hidden Valley Road will remain. These will require ongoing maintenance and potentially repair costs for the City. Natural Environment The Hidden Valley ESPA/PSW is located directly downstream of the proposed stormwater management controls, and thus could be impacted by changes to the flow rate and volume released by the stormwater controls. Water balance within a wetland is critical to maintaining it's health, and while changes to flow volume are expected to be minimal through this alternative, there may be long-term changes to the hydroperiod of the wetland which could negatively impact the overall function and viability of the wetland. The Hidden Valley PSW forms part of the critical habitat for a restricted species under the ESA. Any changes to hydraulics in the wetland, even minor, could have detrimental impacts to this species and their protected habitat. Similarly, any changes to groundwater and water balance have potential for short and long-term impacts on associated wetland features and functions. As no fish are present within the upstream reaches of Hidden Valley Creek, impacts to fish and fish habitat are not anticipated. This alternative also has the potential to impact confirmed SAR bat habitat and confirmed species at risk vegetation such as the Butternut. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 55 A Montrose Environml2®t;iPt694pafQ162 7.3 Alternative 3 Technical Environment Alternative 3 is a flow control structure, such as a dam, constructed in the Hidden Valley ESPA/PSW. This alternative has the potential to reduce flood risk at Hidden Valley Road through controlled outflow from the wetland. This alternative also reduces the uncertainty of beaver dam failures but does not eliminate the hazard. Regional and provincial approvability of this alternative would be very difficult given the high potential for environmental harm. It is unlikely that Regulatory approval would be granted for such an endeavour given severity of ecological impact. Therefore, Alternative 3 is not preferred within the technical environment. Cultural and Social -Economic Environment This alternative would require construction in undisturbed lands and thus require an archaeological assessment. Construction within the wetland would require access be created, which could impact local traffic and access to the informal trailways. Construction within the wetland would be difficult, resulting in prolonged noise and traffic inconveniences caused by the construction. Alternative 3 presents the highest capital cost of any alternative, due to the complexities involved in construction. The area where a dam would be constructed is privately owned. Therefore, capital costs would need to include property acquisition in addition to construction. The financial costs for Alternative 3 are substantially higher than the other alternatives. The design, permitting and approvals phase of this alternative could cost as much as construction of the other alternatives due to the complexities of working in a wetland. The capital construction costs of Alternative 3 would be significantly more expensive than the other alternatives, The operations and maintenance requirements for Alternative 3 would have to meeting provincial standards for dams. This include regular structural and safety inspections and regulated management programs. The financial implications of this are ongoing and substantially higher than the other alternatives. Access to the wetland would have to be designed through highly sensitive environmental land, stabilized construction and staging areas would have to be 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 56 A Montrose EnvironmI2at;iPt695pafQ162 established on naturally saturated loose soil for heavy machinery, and intensive remediation controls and monitoring post -construction would have to be established. Monitoring for debris jams would be required following significant flow events, and structural inspection and maintenance would be required for the lifetime of the structure. Alternative 3 has the highest operation and maintenance requirements of all the alternatives. In addition, removing a natural blockage and establishing a man-made flow control within the Hidden Valley ESPA/PSW would open the City to liability concerning future flood damages. A riparian landowner is not allowed to alter the natural flow of a watercourse in such a way that would impact other riparian landowners, and the removal or change to woody debris and beaver blockages can be classified as an alteration to a natural watercourse if it impacts other riparian landowners. By replacing a naturally occurring hydraulic control with a City -owned structure, the liability for future flooding would rest upon the City. Natural Environment Alternative 3 presents the greatest challenge in implementation from a natural environment perspective, as it would be highly intrusive to the Hidden Valley ESPA/PSW. Establishing an engineered structure within a PSW presents a high risk of potential impacts to the wetland caused by construction activities and ongoing access. Damage to the wetland during construction could impair or destroy the ecologically significant habitat communities within the feature. The proposed area provides critical habitat for a restricted species. It is anticipated that an Overall Benefit Permit from the MECP would be required and may be difficult to obtain. Additional impacts include the potential for changes to water balance in the wetland, impacts to SAR bat habitat, impact to SAR vegetation, reptiles and amphibians, habitat fragmentation due to access road construction, and increased potential for debris jams. As no fish are present within the upstream reaches of Hidden Valley Creek, impacts to fish and fish habitat are not anticipated. It is anticipated that Alternative 3 has the most substantial impacts to the natural environment. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 57 A Montrose Environml2®t;iPt6:96pafQ162 7.4 Alternative 4 Technical Environment Alternative 4 is an increase in the conveyance capacity downstream of the wetland, specifically at Hidden Valley Road. Improving conveyance at Hidden Valley Road would improve flood risk upstream of Hidden Valley Road and reduce erosion risk downstream of Hidden Valley Road. Alternative 4 was assessed based on replacing the existing culverts at Hidden Valley Road with a single box culvert measuring 1,200 mm rise by 3,900 mm span. Replacing the existing the roadway culvert with a concrete box culvert of 1,200 mm rise by 3,900 mm span would convey the 1:50 year flow without overtopping the roadway and therefore would meet the MTO design criteria. Conveyance improvements to the Hidden Valley Road culvert do not change the hydraulic conditions upstream of the 735 Hidden Valley Road driveway crossing. Table 6 presents the hydraulic results of this Alternative 4 culvert replacement and Figure 12 shows a comparison of flood extents for the 1:10- and 1:50 -year events between Existing Conditions and the assessed Alternative 4 Conveyance Conditions. Figure 13 shows a profile comparison of the 1:50 -year event. TABLE 6 Alternative 4 Hydraulic Results for Hidden Valley Road for the 10 -year Flow Notes: VxD = Velocity times depth over the roadway. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 5g A Montrose Environml2at;ipt6S:�#Q162 The MTO design standard for local roads such as Hidden Valley Road is to convey the 10 -year flow through the culvert. The Alternative 4 Conveyance Conditions are shown to convey the 50 -year flow without overtopping the road. By conveying more than the minimum required by the MTO standards, this alternative further reduces the risk of road overtopping and related erosion. This alternative also ensures that backwater conditions resulting from this crossing do not impact the driveway culverts at 735 Hidden Valley Road up to and including the 50 -year flow. Due to climate change, there is increased uncertainty and risk associated with extreme weather events. The resilience of infrastructure is of particular importance to ensure that sufficient flood protection is provided in the future as well as to current standards for critical infrastructure and flood prone locations. The Alternative 4 Conveyance Conditions provides climate change resilience by designing to a level of service well above the MTO design standard. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 59 A Montrose Environml2®t;iPt696paf 1162 E c 0 d w Existing Conditions Flood Levels E 0 d w Main Channel Distance (m) Main Channel Distance (m) Proposed Conditions Flood Levels FIGURE 12 Flood Level Comparison 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Legend WS 50 yr WS 20 yr WS 10 yr WS 5 yr WS 2 yr Ground Set WS Legend WS 50 yr WS 20 yr WS 10 yr WS 5 yr WS 2 yr Ground Matrix Solutions Inc. 60 A Montrose Environmf2at,iPt699pfQ162 I 735 Hidden Valley Driveway 0 50 100 150 200 Main Channel Distance (m) 250 Legend WS 50 yr - Exisiting_Conditions WS 50yr- Alternative 4 Ground set WS FIGURE 13 1:50 -year Profile Comparison The flood extent directly upstream of Hidden Valley Road would be greatly reduced under the assessed Alternative 4 conditions. Flood conditions further upstream at the driveway of 735 Hidden Valley Road would be unchanged due to the elevation of the Hidden Valley Road crest (293.34 m) being lower than the channel upstream of driveway culvert (293.74 m). Increases to conveyance capacity at Hidden Valley Road would not improve flood conditions at the buildings on the 735 Hidden Valley Road property. Water surface elevations at HEC -RAS station 140 (upstream of the driveway crossing) are consistent between existing conditions and the assessed Alternative 4 conditions. The objectives of this project are to reduce flood risk, and not necessarily to change the Regulatory flood hazard limits as defined by GRCA. Alternative 4 will not change the Regulatory flood hazard limits as set by GRCA on either the downstream side of Hidden Valley Road, through the private property at 730 Hidden Valley Road or the upstream side of Hidden Valley Road, through the private property at 735 Hidden Valley Road. Erosion control and channel banks stabilization downstream of the 735 Hidden Valley Road driveway would reduce the sediment volumes at the Hidden Valley Road culverts. This improvement would reduce operations and maintenance costs at the road culvert and improve slope stability at 735 Hidden Valley Road. This slope stability work on the 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 61 A Montrose Environml2at;iptlB�16#Q162 channel would be undertaken by the City on private property in order to protect the City's road crossing infrastructure from sedimentation. For the purposes of this EA, we have assumed this work would be mutually beneficial and therefore permissions and a temporary easement for the work would be easily obtained. This alternative would require the standard roadworks approvals process, such as GRCA approval and a Departments of Fisheries and Oceans Request for Review. It is anticipated that the approvals process for this alternative will be straight forward. Cultural and Social -Economic Environment Construction activities for this alternative would be limited to previously disturbed lands, and thus would not require additional archaeological investigations. Construction for Alternative 4 would be limited to the roadway and would result in temporary traffic disruption to nearby residents and increased noise. This alternative presents the lowest capital cost and maintenance of all alternatives, except for Alternative 1. Natural Environment Alternative 4 proposes works within the vicinity of Hidden Valley East Creek. This area is located outside of the Hidden Valley PSW and outside of the critical habitat for the restricted species. The proposed impacts to the natural environment would be limited in duration and overall area, with most impacts occurring for the duration of construction only. Although some bank and riparian vegetation would be removed during construction, the overall landscape could be improved by increasing native species cover through a site- specific restoration and planting plan. Hydraulic capacity upgrades to the system would increase the bank stability and decrease the erosion rate. The Hidden Valley Road culvert is just one of the many barriers to fish within the Hidden Valley Creek system. It is heavily sedimented, with the low flow culvert being almost entirely buried. The area immediately downstream of the culvert is functionally connected to the Grand River and may support fish and fish habitat. The area isolated vernal ponds and wetlands upstream of the Hidden Valley Road culvert is fishless and supports a population of a restricted species and its critical habitat. The introduction of fish to this area through culvert improvements is not recommended. As part of the 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 62 A Montrose EnvironmI2at;Z&6ff$pafQ162 detailed design phase of this project it is recommended to incorporate either passive or active fish exclusion measures as part of the culvert replacement. These exclusion measures shall ensure that the population and habitat of the restricted species are not negatively impacted. Evaluation Table Each alternative has been ranked for each subcategory. Success bubbles are shown across the screening results to give an easy visualization of each alternative's score. More advantageous alternatives have circles which are coloured in. A full summary of the evaluation shown in Table 7. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. 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Alternative 4 considers increased conveyance capacity at Hidden Valley Road and erosion protection upstream of Hidden Valley Road. Alternative 4 has the highest technical score of all alternatives, as it reliably reduces flood risk, has minimal approval requirements, and requires relatively straightforward construction. Alternative 4 was assessed using a 3,900 mm span by 1,200 mm rise box culvert which was shown to meet the City and MTO roadway design criteria and reduce road overtopping to flows greater than the 1:50 -year flow. Erosion control measures could be implemented upstream of the roadway. This would increase slope stability and reduce sedimentation at the road culvert. In comparison, Alternative 1 does not improve flood risk, and Alternatives 2 and 3 have unreliable potential for reducing flood risk. Alternative 3 would have a prolonged and difficult approval process, which further reduces its technical scoring. Alternative 4 increases the conveyance capacity of Hidden Valley Road and reinforces the slopes upstream of Hidden Valley Road, reducing the water surface elevation and decreasing the potential for future erosion. Velocity dissipation within the culvert design also allows for decreased shear stress along the banks downstream of the road, improving long-term slope stability through 730 Hidden Valley Road. The preferred alternative must be designed so that there are no impacts to flood elevations for all storm events (2, 5, 10, 25, 50, 100, and Regional). Alternative 4 has the highest Cultural/Social-Economic score, as it will reduce flooding, maintain the existing land use, and not have an intensive construction cycle. The social - economic scores of Alternatives 1, 2, and 3 are reduced due to: continuation of flooding, occupation of additional land, and long/intensive construction window, respectively. Alternative 3 also increased the City's potential liability because of a City -owned structure in the watercourse. This further reduces Alternative 3's social -economic scores. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 6g A Montrose Environml2®t;ipt6fh_�#Q162 Alternative 4 improves upon the natural habitat of the area and has the highest Natural Environment scoring. Alternative 1 maintains the existing natural habitat, while Alternatives 2 and 3 have the potential to negatively impact SAR habitat within the PSW/ESPA. Alternative 4 is the only alternative to improve upon existing conditions through restoring the landscape and native vegetation. Practical measures to restore or enhance sections of Hidden Valley Creek as well as adjacent riparian areas will be clearly outlined and implemented at the detailed design stage The use of native seed mixes, live -stakes, and appropriate bio -engineering measures is strongly encouraged for long- term erosion and sediment control. Natural channel design principles shall be followed to the extent possible. 9 PROJECT IMPLEMENTATION AND NEXT STEPS Planning It is recommended that the City proceed with implementation of the conveyance improvement works identified as detailed in the preferred solution (Section 8). Detailed design is required to develop engineering drawings for tender and construction. In preparation for detailed design, the following is recommended: • Tree Inventory and Cavity Tree Assessment - Once the extents of construction impacts are known a detailed tree inventory & cavity tree assessment should be completed to assess the potential for SAR vegetation and SAR bats within the proposed limits of construction. Any removal of trees with suitable cavities for SAR bats should consider the appropriate mitigation strategies as outlined in Appendix E. • Construction Access and Laydown Areas - All areas selected for construction access routes and as laydown areas, should be confirmed and staked in the field in consultation with an ecologist prior to construction in order to avoid sensitive species and larger trees to the extent possible. • Geotechnical investigation may be required during the detailed design. • Survey - Legal and topographic surveys will be required for detailed design. Subsurface Utility Engineering surveys may be required at detailed design. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 69 A Montrose Environml2at;iPt608pafQ162 • Additional information will be required at detailed design to demonstrate that the following applicable policies outlined under Section 9.1.2 of the GRCA's consolidated policies will be met: + the risk of flood damage to upstream or downstream properties is reduced through site and infrastructure design, wherever possible + where unavoidable, intrusions on significant natural features or hydrologic or ecological functions are minimized and it can be demonstrated that best management practices including site and infrastructure design and appropriate remedial measures will adequately restore and enhance features and functions + physical realignments or alterations to the river, creek, stream or watercourse channel associated with a new crossing are avoided or are in accordance with the policies in Section 9.1.16 + maintenance requirements are minimized 9,2 Environmental Mitigation Measures and Monitoring Mitigation measures must be set in place to safeguard natural heritage features near the project area during construction. Design and construction plans will follow best management practices to minimize negative impacts, protect the environment, and encourage overall environmental improvements. Environmental monitoring will be conducted during construction and post -construction to ensure the design continues to serve as intended and does not negatively impact the surrounding area. Mitigation measures include, but are not limited to, the following: • Notification to Agencies + A permit will be required from GRCA • Respecting construction timing windows with respect to migrating birds and aquatic habitat/working in the dry • Applying best construction practices • Preventing wildlife mortality and disturbance • Preventing terrestrial disturbance 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final 70 V1.0_Accessi ble.docx Matrix Solutions Inc. A Montrose Environml2at;iPtraQ9pafQ162 • Implementing erosion and sediment controls during construction • Protecting SAR 9.2.1 Temporary Flow Passage MTO Drainage Design Standard TW -1 identifies the return periods for sizing of temporary drainage facilities (e.g., bridges, culverts, diversion channels, and diversion pipes) during construction. It also includes the return period associated with the design of temporary erosion control basins. The return period for the design of temporary drainage measures required during construction are assessed on a project specific basis. The contributing factors affecting the choice of return period depends on the length of the construction period and include consideration of potential consequences in terms of public safety, traffic delays, property damage due to flooding, and environmental impacts. Whether a dam and pump or dam and divert temporary flow passage system is selected for flow bypass, an Ontario MECP Permit to take Water (PTTW) is not anticipated for construction activities related to this site. However, if there is active pumping at the site, such as damming the culvert and pumping around it or from within a cofferdam, the following conditions are required: • discharge from the pumping operation contains no visible contaminants • erosion and sediment control measures are installed and properly used • water taking and discharge flow rate is controlled to ensure no downstream or upstream impacts on water quantity or quality (i.e., no storage or ponding of water onsite) • refueling of pumps occurs at a distance of greater than 30 m from the water body The noted requirements, including an erosion and sediment control plan for construction, will be incorporated into the contract documents and operational constraints for construction activities related to the project. In addition to the requirements noted above, the new MECP regulations also formally acknowledges that passive stream diversion (water managed through the site without pumping) does not require a PTTW but requires that the water levels upstream or downstream are note effected and that surface water remains on or is directly returned to the same water body. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 71 A Montrose Environml2®tpt&r6pafQ162 MTO's Highway Drainage Design Standards (MTO 2008) Section TW -2 provides guidance on return period flow for sizing temporary drainage works during construction. The return period is based on the length of the construction period and the potential consequences of failure in terms of public safety, traffic delays, property damage due to flooding, and environmental impacts. The minimum return periods defined by MTO are presented in Table 8. Assuming a construction duration of less than 2 months, the return period for sizing bypass works is the 1:2 -year event regardless of the level of consequence. TABLE 8 Minimum Minor Return Period for Temporary Works (MTO 2008) Less than 2 months 11:2 -year event , 1:2 -year event 11:2 -year event Up to 4 months 1:2 -year event 1:5 -year event 1:5 -year event Up to 8 months 1:5 -year event 1:5 -year event 1:10 -year _ event i Up to 12 months 1:5 -year event 1:5 -year event 1:25 -year event _ Up to 18 months 1:5 -year event 1:10 -year 1:25 -year event event Greater than 18 1:10 -year 1:10 -year 1:25 -year i months event event event 9.2.2 Notification The GRCA should be notified of the scheduled initiation of work within the watercourse and on the watercourse banks. The contract administrator must be notified at the commencement of the excavation works to provide opportunity to inspect the watercourse bypass measures. The contractor shall provide details and descriptions, working drawings, and schedules that detail the sequence of the in -water work and the provision of temporary water passage associated with the construction. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 72 A Montrose Environml2atZ&&r$pafQ162 9.2.1 Isolation All in -stream work must be completed in the dry by dewatering the work area and diverting or pumping the flows around the limits of the work area as follows: • Existing stream flows must be maintained downstream of the dewatered work area. • A flow dissipater such as clean slotted barrel or filter bags should be placed at water discharge points to prevent erosion and sediment release. • Sediment laden dewatering discharge within work areas should be pumped to a settling basin well away from the watercourse and allowed to settle or filter through a minimum of 30 m of grassed vegetation before re-entering the watercourse. • The work area should be stabilized against the impacts of high-flow events at the end of each workday. • Work in the watercourse and floodplain should be suspended and the work area stabilized when there is a high probability of a convective rainfall event and during warm winter periods where there is a high likelihood of significant snow melt runoff. • Materials used for coffer dam construction should be filled with clean pea gravel free of particulates. • For additional guidance on staging and isolation, the Erosion and Sediment Control Guide for Urban Construction (TRCA 2019) should be consulted. Seepage discharge upstream of the crossing, noted during the field reconnaissance, will have to be assessed and managed during the detailed design phase. Groundwater constraints and the potential for short and long-term impacts on associated wetland features and functions will need to be assessed and properly mitigated at the detailed design stage. A during construction dewatering plan will also be required. 9.2.2 Phasing Prior to commencing construction, the isolation and bypass system should be established. The downstream coffer dam should be constructed first followed by the upstream coffer dam. A qualified aquatic biologist should then capture fish within the 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 73 A Montrose Environm12®tiDt&r2pafQ162 work area. Fish should be relocated downstream. The work area should then be dewatered under supervision of the aquatic biologist. Following the completion of the culvert construction, remove the downstream cofferdam and allow water to backflow into the construction area. Slowly remove the upstream cofferdam to allow water to enter the new culvert. If a bypass pumping system is used, disable the bypass pumping to progressively achieve full flow. The contract must provide primary and back-up pumps with sufficient capacity to convey the baseflow of the channel if the dam and pump technique is used. 9.2.3 Fish Capture The area immediately downstream of the Hidden Valley Road culvert may have fish present from the Grand River. Any in -water works should adhere to the construction timing windows for warmwater fisheries, identified as March 15 to July 15, and follow the best management practices for construction. Further details can be found in Appendix E. Prior to any works, it is anticipated that a DFO request for review (RFR) or a DFO Letter of Authorization (LOA) may be required. To support the fish rescue, a Scientific Fish Collection License for Scientific Purposes and a Wildlife Scientific Collectors Authorization from the MNRF would be required. 9.2.4 Weather Conditions The contractor should monitor the weather forecast several days prior to commencing in -stream construction to ensure that works will be commenced during favourable weather conditions. Once construction has started, the contractor must continue to monitor the weather and prepare the site for any forecasted rainfall events. Preparations include provision of supplemental pumping capacity, backfilling or covering open excavations and exposed soil, securing any falsework, and ceasing any works or operations within the watercourse. 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 74 A Montrose Environml2®tiDt&r8pafQ162 10 REFERENCES Canadian Water Resources Journal. 1979. Common Law and Land Drainage in Ontario. Vol. 4 No. 2, 1979. J. Douglas Cameron. COMMON LAW AND LAND DRAINAGE IN ONTARIO (tandfonline.com) Cameron J.D. 1979. "Common Law and Land Drainage in Ontario." Canadian Water Resources Journal/Revue canadienne des ressources hydriques 4 (2): 34-50. 1979. City of Kitchener. 2019. Hidden Valley Land Use Master Plan. Planning Division. June 2019. City of Kitchener. 2021. Development Manual. Kitchener, Ontario. Summer 2021. City of Kitchener. 2024. Kitchen GeoHub Opendata. Online files: Roads.shp Government of Ontario. 2022. Drainage Conflict: Natural Watercourses. Ministry of Agriculture, Food, and Rural Resources. May 10, 2022. https://www.ontario.ca/page/drainage-conflict-natural-watercourses Government of Ontario. 2019. A Place to Grow, Growth Plan for the Greater golden Horseshoe. May 2019. Government of Ontario. 2006. Places to Grow: Growth Plan for the Greater Golden Horseshoe Area. Ministry of Public Infrastructure Renewal. Toronto, Ontario. 2006. IBI Group (IBI). 2013. Class Environmental Assessment, River Road Extension from King Street East to Manitou Drive, Stormwater Management Report. Prepared for the Regional Municipality of Waterloo. December 2013. Ministry of Agriculture and Food (OMAF). 1974. Common Law Aspects of Water. 1974- Common-Law-Aspects-of-Water.pdf (drainage.org) Ontario Ministry of Municipal Affairs and Housing (MMAH). 2020. Provincial Policy Statement, 2020. Issued under Section 3 of the Planning Act. Queen's Printer for Ontario, 2020. Toronto, Ontario. May 1, 2020. Ontario Ministry of Municipal Affairs and Housing (MMAH). 2017. Greenbelt Plan. May 2017. 2017. http://www.mah.gov.on.ca/AssetFactory.aspx?did=18549 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 75 A Montrose Environml2®tiPt&ApafQ162 Ontario Ministry of Municipal Affairs (MMA). 2017. Oak Ridges Moraine Conservation Plan (2017). 2017. Ontario Ministry of the Environment and Climate Change (MOECC). 2017. Considering Climate Change in the Environmental Assessment Process. Toronto, Ontario. 2017. https://www.ontario.ca/page/considering-climate-change-environmental- assessment-process Ontario Ministry of Transportation (MTO). 2008. Highway Drainage Design Standards. Downsview, Ontario. January 2008. Regional Municipality of Waterloo (Region of Waterloo). 2022. Grand River Source Protection Plans. Grand River Conservation Authority, Volume 2, Chapter 10. February 2022. Stantec. 2010. Intake Protection Zone Delination — Grand River Hidden Valley Intake. City of Kitchener. Kitchener, Ontario. July 2010. Stantec Consulting Ltd. (Stantec). 2013. Stage 1 Hydrogeology Study, River Road Extension - King Street to Manitou Drive, Kitchener, Ontario. Prepared for the Regional Municipality of Waterloo, Transportation and Environmental Services Department. Kitchener, Ontario. March 2013. Stantec. 2014. 2013 Pre -Construction Groundwater and Surface Water Monitoring. Proposed River Road Extension — King Street to Manitou Drive, Kitchener, Ontario. City of Kitchener. Kitchener, Ontario. February 2014. Toronto and Region Conservation Authority (TRCA). 2019. Erosion and Sediment Control Guidelines for Urban Construction. Sustainable Technologies Evaluation Program (STEP). Ontario. 2019. https://sustainabletechnologies.ca/app/uploads/2020/01/ESC-Guide-for-Urban- Construction_FI NAL.pdf WalterFedy. 2015. Hydrologic and Hydraulic Study, Hidden Valley Creek Watershed. Prepared for the City of Kitchener. August 2015. WalterFedy. 2015. Hydrologic and Hydraulic Study. City of Kitchener. Kitchener, Ontario. August 2015 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final Matrix Solutions Inc. V1.0_Accessible.docx 76 A Montrose Environml2®tiPt&r5pafQ162 Wood Environment & Infrastructure Solutions (Wood). 2019. Flow Monitoring, Calibration and Hydrologic Study for New Secondary Plan. Hidden Valley Community, Prepared for City of Kitchener. Burlington, Ontario. November 2019. WSP. 2021. River Road Extension from Manitou Drive to King Street. Stormwater Management and Hydraulics Report. Kitchener, ON. Prepared for the Region of Waterloo. July 26, 2021 31809 Hidden Valley Flood Risk Reduction EA 2024-03-06 final V1.0_Accessi ble.docx Matrix Solutions Inc. 77 A Montrose Environml2®tipt&r6pfQ162 Page 617 of 2162 1 Matrix Solutions Inc. ENVIRONMENT & ENGINEERING KITCHENEi NOTICE OF STUDY COMMENCEMENT Municipal Class Environmental Assessment Hidden Valley Flood Risk Reduction The Study The City of Kitchener (the City) retained Matrix Solutions Inc. (Matrix) to provide a Municipal Class Environmental Assessment (EA) for flood risk reduction in the Hidden Valley Creek subwatershed. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The Process The project is being carried out in accordance with the requirements of the Environmental Assessment Act and it is being planned under Schedule B. The intent of this project is to identify solutions and design alternatives to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. A key component of the EA process will be consultation with interested stakeholders (public, landowners, and agencies). Matrix will conduct a detailed background review and hydrologic/hydraulic analysis of the study area and identify potential solutions to reduce flood hazard. Upon completion of the analysis, Matrix will prepare a Project Report for the City and for submission to the Ministry of the Environment, Conservation and Parks (MECP), which will be available for public review for a period of 30 calendar days. All interested parties will have an opportunity to attend a Public Information Centre (PIC) meeting hosted prior to the final decisions on the proposed solutions. Notification of the PIC will be provided through email and postings on the City's website. Study Area The Hidden Valley Creek subwatershed is approximately 200 ha located in southeast Kitchener (see Figure 1). The Hidden Valley Creek subwatershed contains a large wetland/woodland environmental complex, which holds classifications of a Provincially Significant Wetland (PSW), Environmentally Sensitive Policy Area (ESPA), and Core Environmental Feature (CEF). Within the study area there are Regionally Significant Woodland and Significant Valley, species at risk habitat, and a warmwater fishery. In addition to being an environmentally sensitive area, the Hidden Valley ESPA/PSW is the hydrologically dominant landscape feature in the subwatershed. The area downstream of the Hidden Valley ESPA/PSW has experienced past flood and erosion impacts related to both specific rainfall -runoff events and/or the release of natural debris -blockages (e.g., beaver dams or natural debris jams) within the wetland feature. Figure 1 Public Feedback Public, Indigenous, and agency consultation is a key component of the Class EA process, and Matrix is interested in hearing any comments or concerns that you may have about this study. Your input is important! To submit a comment or question via email, or if you have accessibility requirements to comment on the study, please contact one of the representatives below: Monica Mazur, M.Sc., P.Eng. Water Resources Analyst Sanitary and Stormwater Utilities Division City of Kitchener Phone: 519-741-2600 Email: hiddenvalley(a�kitchener.ca Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer Matrix Solutions Inc. Phone: 226-314-1932 Email: khofbauer(a�matrix-solutions.com Please note that comments will be maintained for reference throughout the project and will become part of the public record. Under the Municipal Freedom of Information and Protection of Privacy Act and the Environmental Assessment Act, any personal information such as name, address, and telephone number included in a submission will become part of the public record unless the comments specifically request that such personal details not be included in the public record. Project information will be made available on the City's website: www.kitchener.ca/hiddenvalley This notice was first issued on June 13, 2023. July 21, 2023 Matrix File No. 31809 Conseil de la Nation Huronne-Wendat Consultation Team: RE: City of Kitchener — Municipal Class Environmental Assessment Hidden Valley Flood Risk Reduction Please find attached a Notice of Study Commencement for the above noted project. This study is being carried out in accordance with the requirements of the Environmental Assessment Act, as a Schedule B Municipal Class Environmental Assessment. All notices related to this project can be found on the City of Kitchener's website at the following link: www.kitchener.ca/hiddenvalley There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This Environmental Assessment is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. Matrix is interested in hearing any comments or concerns that you may have about this study. Please feel free to call or email me using the contact details below should you require additional information. We look forward to hearing from you. Yours truly, MATRIX SOLUTIONS INC. A Montrose Environmental C ,ipany Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer Phone: 226.314.1932 Email: khofbauer@matrix-solutions.com KH/vc Attachments copy: Monica Mazur, Water Resources Analyst, Sanitary & Stormwater Utilities Division, City of Kitchener Page 620 of 2162 July 21, 2023 Matrix File No. 31809 Mississaugas of the Credit First Nation Department of Consultation and Accommodation RE: City of Kitchener — Municipal Class Environmental Assessment Hidden Valley Flood Risk Reduction Please find attached a Notice of Study Commencement for the above noted project. This study is being carried out in accordance with the requirements of the Environmental Assessment Act, as a Schedule B Municipal Class Environmental Assessment. All notices related to this project can be found on the City of Kitchener's website at the following link: www.kitchener.ca/hiddenvalley There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This Environmental Assessment is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. Matrix is interested in hearing any comments or concerns that you may have about this study. Please feel free to call or email me using the contact details below should you require additional information. We look forward to hearing from you. Yours truly, MATRIX SOLUTIONS INC. A Montrose Environmental Company Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer Phone: 226.314.1932 Email: khofbauer(a)matrix-solutions.com KH/vc Attachments copy: Monica Mazur, Water Resources Analyst, Sanitary & Stormwater Utilities Division, City of Kitchener Page 621 of 2162 July 21, 2023 Matrix File No. 31809 Six Nations of the Grand River Consultation and Accommodation Process Team: RE: City of Kitchener — Municipal Class Environmental Assessment Hidden Valley Flood Risk Reduction Please find attached a Notice of Study Commencement for the above noted project. This study is being carried out in accordance with the requirements of the Environmental Assessment Act, as a Schedule B Municipal Class Environmental Assessment. All notices related to this project can be found on the City of Kitchener's website at the following link: www.kitchener.ca/hiddenvalley There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This Environmental Assessment is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. Matrix is interested in hearing any comments or concerns that you may have about this study. Please feel free to call or email me using the contact details below should you require additional information. We look forward to hearing from you. Yours truly, MATRIX SOLUTIONS INC. Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer Phone: 226.314.1932 Email: khofbauer@matrix-solutions.com KH/vc Attachments copy: Monica Mazur, Water Resources Analyst, Sanitary & Stormwater Utilities Division, City of Kitchener Page 622 of 2162 Monica Mazur Subject: Mississaugas of the Credit First Nation lunch & DMAF engagement meeting Location: 72 Wilson Ave (72 Wilson Ave, Kitchener Ontario N2C 1G5, Canada) Start: Fri 6/23/2023 12:00 PM End: Fri 6/23/2023 3:00 PM Recurrence: (none) Meeting Status: Not yet responded Organizer: Sarah Anderson Here is a proposed agenda for our meeting and lunch on Friday. Mark, Abby and Adam, please let us know if you would like to add to or change the agenda. 11:30 to 12 p.m. Arrive at the park. We will have coffee, tea and fruit set up at the covered shelter in Wilson Park. 12:00 p.m. to 12:30 p.m. Welcoming remarks 12:30 to 1:30 Lunch provided by White Owl Native Ancestry 1:30 to 2:30 Engagement meeting (presentation to be shared ahead) • Schneider Creek and Shoemaker Creek EA alternative solutions review Hidden Valley Environmental Assessment Notice of Commencement (kitchener.ca) o Natalie Goss (Manager of Policy & Research — Planning Division) and Richard Kelly-Ruetz (Senior Planner) will be present to respond to questions from a Planning perspective. How we have begun incorporating Indigenous knowledge into EA processes (see attached document) 2:30 — 3:00 p.m. Montgomery Creek restoration tour The lunch, meetings and tour will be held outside. Please dress for the weather and bring a water bottle. NOTE: The park is across from Kingsdale Community Centre at 72 Wilson Avenue. The covered shelter is about 100 meters south of Wilson Ave, along the creek -side path. Washrooms are available indoors at the community centre and at the 78 Wilson Avenue pool. https://goo.gl/maps/5BuPgHVbm7sClK1g8 Page 623 of 2162 1 DMAF - Six Nations of the Grand River Consultation and Accommodation Process team K*Cl-�NER June 15, 2023 9:30 a.m. to 2:30 p.m. 131 Goodrich Drive, Kitchener, ON Visit objectives: To engage in Nation -to -Nation relationship building and seek feedback on Sanitary & Stormwater Division and Parks & Cemeteries Division initiatives. Six Nations of the Grand River Consultation and Accommodation Process Team Participants: • Tanya Hill -Montour, • Lonny Bomberry, Director of • Dawn Russell, Consultation Archaeology Lands and Resources Administrative Assistant Supervisor • SNGR to confirm other • participants in June City of Kitchener Particil • Denise McGoldrick, General Manager Infrastructure Services • Bu Lam, Director of Sanitary and Stormwater Utilities (SSU) • Jeffery Silcox -Childs, Director Parks and Cemeteries (P&C) • Sophia, Director of Equity, Anti -Racism and Indigenous Initiatives nts • Nick Gollan, Manager of Planning and Programs (SSU) • Ashley Visneski, Manager of Parks and Open Spaces Design and Development (P&C) • Josh Shea, Manager, Forestry and Natural Areas (P&C) • Samantha Brickman, Supervisor of Capital Programs (SSU) • Bart Mazan, Project Manager (SSU) • Chris Nechacov, Project Manager (SSU) • Rachel Voros, Natural Areas Project Manager (P&C) • Liz Christensen, Trails Project Manager (P&C) • Rebecca Roy, Landscape Architect (P&C) • Sabiha Syed, Park Engagement Liaison (P&C) • Sarah Anderson, Engagement Associate (SSU) • Colin Funk, Engagement Support Student (SSU) Time Discussion Presenters Participants 9:30 am- Arrival 10:00 am • Coffee, tea and snacks provided 10:00 am- Welcoming remarks Denise McGoldrick SNGR team 10:30 am SSU team Jeffery Silcox -Childs Ashley Visneski Josh Shea Sophia Stanberry 10:30 am- SSU engagement Bu Lam SNGR team 11:15 am • Schneider Creek and Shoemaker Creek Nick Gollan SSU team EA alternative solutions review Samantha Brickman Denise McGoldrick • Hidden Valley Environmental Sophia Stanberry Assessment Notice of Assessment Short break O:\Secured\DMAF\Com m_Engagement Page 624 of 2162 11:20 am- Park and Cemeteries Engagement Jeff Silcox -Childs SNGR team 12:00 pm • Permanent Indigenous Space Ashley Visneski P&C team • Wiijindamaan Project Josh Shea Denise McGoldrick • Huron Natural Area Management Plan Sophia Stanberry SSU team 12:00 pm - Lunch at 131 Goodrich followed by travel SSU hosts lunch SNGR team 1:30 pm to Wilson Park Denise McGoldrick • Includes vegan and gluten-free options Sophia Stanberry SSU team P&C team 1:30 pm- Tour of the Montgomery Creek restoration Stantec Consulting SNGR team 2:30 pm • Park at Kingsdale Community R&M Construction SSU team Centre (see directions below) SHIFT Denise McGoldrick • Meet at the Wilson Avenue Rebecca Roy Sophia Stanberry pedestrian bridge P&C team Directions to Kingsdale Community Centre at 72 Wilson Avenue from 131 Goodrich Drive: t, Turn left onto Goodrich Dr 35C m r+ Turn right onto Wilson Ave 2.2 km Turn right 0 Destination will be on the right 57 m Kingsdale Community Centre 72 Wilson Ave, Kitchener, ON N2C 1 G5 ii ar% O:\Secured\DMAF\Com m_Engagement Page 625 of 2162 Q z W Q a LT ^V! 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WELCOMING REMARKS Sarah Anderson welcomed Abby LaForme to a more informal meeting and invited everyone to introduce themselves. Abby said that there is nothing she wanted to add to the agenda. They are happy with everything that is being conducted. They are here to listen and hear the updates. 2. HIDDEN VALLEY FLOOD CONTROL ENVIRONMENTAL ASSESSMENT ALTERNATIVE SOLUTIONS Monica Mazur presented the Alternative Solutions for the Hidden Valley Flood Control EA Background (see attached slides for additional information) a. The EA focuses on a subwatershed just upstream of the Grand River. The majority of the subwatershed is currently uninhabited. It contains a provincially significant O:\Secured\DM AF\Comm_Engagem ent Page 645 of 2162 wetland, fish, deer, beavers, and other wildlife habitat. There is a flood and erosion vulnerable area at the downstream part of Hidden Valley Creek at Hidden Valley Road. b. The Master Land Use Study was completed in 2019. c. The EA is a part of the Secondary Planning Process. There are also a Stormwater Management Strategy and Source Protection/Intake Protection Zone study included in this Secondary Plan process 3. Phase 1 of the EA was completed in June 2023. The EA is meant to explore alternatives and select a preferred solution for flood risk reduction. Potential Alternative Solutions: a. Alternative 1: Do Nothing i. Required to be considered by provincial EA processes ii. Increased erosion and washouts and flooding would continue b. Alternative 2: Reduce flows upstream of wetland i. Implement stormwater management (SWM) facilities (e.g. ponds) upstream of the wetland ii. Create a SWM facility before development or require developers to implement SWM to overcontrol flows iii. Could negatively impact the wetland by reducing inflows to the wetland. Wetlands are complex systems, and this could have a negative impact on habitat. c. Alternative 3: Flow control structure in Wetland i. Adding an engineered concrete berm or dam downstream of the wetland ii. This solution is the least favourable for the City: it's very invasive, it would be difficult to get regulatory approval, and it would have negative impacts on the wetland habitat. We are moving away from hard engineering approaches towards naturalized solutions. d. Alternative 4: Conveyance improvements downstream of wetland i. Replacing culverts with infrastructure such as a bridge. Expanding and naturalizing the channel ii. This would be an opportunity to restore habitat connectivity, open up the channel as the current culvert is a barrier iii. This would prevent future road washouts and creek erosion at Hidden Valley Road. 4. Evaluation Criteria a. Integrating MCFN feedback into the EA criteria i. Integrating Indigenous knowledge and priorities 1. Looking for ways to bring the wild back to developed areas (ex. Replacing the culvert and making the stream more naturalized) 2. Showing reciprocity to the earth 5. Preliminary Evaluation of Alternatives presented in slides: Option 4 is preliminary preferred solution. 6. The City will share the preferred alternative report by email, likely in November [Delayed until winter 2024], and there will be a 30 -day response period for feedback on the preferred alternative. MCFN DOCA feedback: O:\Secured\DM AF\Comm_Engagem ent Page 646 of 2162 Preference: • Prefer the naturalization option on Option Four. Option Four does not help the residents at the other site, though. If it's anything like the Montgomery Creek restoration, I'm on board. • Not at all in favour of alternative three. • Alternative 4 is more geared toward natural species and habitat, and that's what we're all about. I have no questions, concerns, or problems with Alternative 4. Request: • Please share the EIS report once it's completed, so I have it on file. If we increase our staff capacity for reviewing environmental reports, we will have the new staff review it. I look for buffering, and species at risk is where it should be. That's all I can offer for involvement as far as environmental work at this point. • Please remind the landowner/developer to contact MCFN about the stage 2 archaeological assessment. Q: I thought you couldn't develop in provincially significant wetland areas? A: None of the development will happen in the protected area. All of the land in green (on the map) is protected. The development is surrounding this area, but not within the provincially protected lands. Q: What impact would Alternative 3 have on the beaver dam? A: It would be very destructive. This is known as a "hard engineering approach". This would have been a common approach 50-60 years ago. Now we look for naturalized approaches. In theory, though this could be effective at reducing flows, it would have many other negative consequences on the natural environment. Also, since the wetland is so complex, it would be difficult to build and design. Q: Regarding Alternative 4, is it basically the same idea that we saw in the park at our in-person meeting? A: Yes. The idea is that we could renaturalize the culverts, recognizing that this would improve the flooding situation at the road, but not at the private driveway upstream. Q: Do the property owners upstream of the public road have culverts in their area already, or would putting in culverts help their flooding? A: Yes, the property owners upstream have culverts on their property. Due to the channel slope and distance from the private culvert crossings, the proposed culvert improvements at Hidden Valley Road presented in Alternative 4 would not impact flood levels at the private driveway/ culverts : With the other studies that you are working for. what oroiect is that for? A: Stage 1 archaeological assessment was completed in the areas that are developable. This is the report we shared with Adam and the DOCA team. The Stage 2 assessment will not be completed until the development plans/designs are finalized. Q: Usually when a project gets to a Stage 2 Archaeological Review, MCFN likes to be involved in the field work. so I wanted to ask when that was harmenine so I can inform Adam. A: The Stage 2 Archaeology Review isn't within scope of this project. We are currently in the process of setting the rules for the development application through the secondary plan. The landowner will be responsible for the Stage 2 archaeological study, rather than the municipality. The landowner is awaiting the City's rules for development through the secondary plan. Q: Has there been an EIS done for the development sites? O:\Secured\DM AF\Comm_Engagem ent Page 647 of 2162 A: Yes, an EIS has been completed for the development sites. This is a very well -studied feature in the City with historical EIS's dating back to 1979. We are now waiting for the secondary plan to be completed. This will give us a set of rules for the landowner/developers. Then the landowner will be responsible for the Stage 2 study, rather than the city. Q: Can you put a bird in the developers' ear about contacting MCFN when they want Stage 2 to begin? Does the city have a policy to inform rights holders when these processes begin, and do they tell rnmi dtantc? A: In recent years, it has become more habit or regular. As we transition to having more involvement by rightsholder's , the "birdie" often comes from the archaeological consultants themselves. They have usually encountered this request or worked on a similar project elsewhere. Kitchener Planning will likely be putting policies in the secondary plan that would help ensure accountability . We haven't done a secondary plan for greenfield development in 10 years, so we are re-evaluating our policies. 7. QUESTIONS FOR KITCHENER'S CEMETERY TEAM There's no urgency around this, and we can add it to our agenda next time, when Adam can join us. 8. ROUNDTABLE Sarah • With DMAF projects we're noticing many of the stronger reactions from the community have been tempered as we show that we are committed to collaborating with the community on project outcomes. People are more on board with the environmental objectives for the project, now that we are also addressing the community's objectives. • The change in engagement approach is changing people's perspectives of the projects Q: Were they able to give their input and feel more comfortable? A: Yes. We set up park pop -ups this summer, with ice cream and the engineering consultants available for questions and to provide context. We also asked kids questions of what their hopes are. Lots of them are very excited about aquatic habitat. We invited the neighbourhood to form a community resource group to work more closely in the design process. Samantha • As part of DMAF, 50% of the projects are related to road reconstructions. For these projects, we add Low Impact Development • Within the road reconstructions, there are Planning and Engineering team's exploring placemaking adjacent to some of these projects. They are interested in involving rights holders. This is in the beginning stages, there's no budget set yet. At a high level, we're hoping to have some specific locations to talk about next meeting [Update: Sarah and Sam clarified subsequently that this process will be much slower than anticipated and may or may not move forward in 2024]. We want to know how you might be interested in this. • Part of this development might have to do with installing low -impact development • Many of the projects are also close to our projects, including the road that we parked on when you visited the park. O:\Secured\DM AF\Comm_Engagem ent Page 648 of 2162 Q: Would this be road widening? A: No, the width of the right of way doesn't change. As infrastructure ages it needs repairing, and now we are often installing low impact development. Abby: I think our interest would be if there was any ground disturbance, ground impacts. The placemaking would be installing signage, plaques, etc. Is that something you would be interested in for park areas? Including your perspective in park areas through historical signage, planting signage? Abby: I can take that idea and see what Mark says. We have a traditional knowledge keeper, he could give you ideas about signage. For plantings, we could talk to the natural design team. I will take this idea with me and see if they want to go with it. Is that something you're interested in, for parks areas, to have signage, historical signage, planting signage? Sarah: Yes, we want to do that for projects moving forward. Integrating MCFN's voices, SNGR voices, and urban Indigenous perspectives through signs and plantings and art. Facilitating representation in those spaces. We have some current road reconstruction projects where we are doing plantings, etc. We could share a photo of that, and a few sentences about that project. ACTION ITEMS 2.1. City to send EIS report once completed. 2.2. City to review changes to secondary plan policies to address need for more accountability for developers to communicate with rights holders regarding the Stage 2 archaeology field work. 3.1. Add questions about cemeteries for Adam to next meeting agenda with MCFN. [Delayed until 2024] 4.1. City to send photo, project description of a road reconstruction with low -impact development plantings. O:\Secured\DM AF\Comm_Engagem ent Page 649 of 2162 J KI�rci�r�R Meeting Notes Date: September 29, 2023 from 10 a.m. to 12 p.m. Meeting at: Microsoft Teams Meeting Ref: City of Kitchener (City) Stormwater and Sanitary Utilities meeting with Six Nations of the Grand River (SNGR) Consultation and Accommodation Process team Purpose • To engage in Municipality -to -Nation relationship building and seek feedback on Sanitary & Stormwater Utility projects and Developmental Services (Engineering and Planning) projects. • To answer questions and learn from the SNGR Consultation and Accommodation Process team Attendees Six Nations of the Grand River, Consultation & Accommodations Process Team: Lonny Bomberry, Director of Lands and Resources Tanya Hill -Montour, Archaeology Supervisor Dawn Russell, Consultation Administrative Assistant Peter Graham, Consultation Supervisor Daylon Gee, Land Use Officer Tayler Hill, Director Trainee Lauren Jones, Manager of the Wildlife and Stewardship Office Lauren Vanderlingen, Wildlife Stewardship Assistant Agenda 1. WELCOMING REMARKS City of Kitchener, Sanitary & Stormwater Utilities: Samantha Brickman, Supervisor of Capital Prograrr Chris Nechacov, Project Manager Sarah Anderson, Engagement Associate Colin Funk, Engagement Support Student Selah Woelk, Engagement Support Student City of Kitchener, Development Engineering Juan Carlos Reyes, Manager Monica Mazur, Project Manager City of Kitchener, Development Services Natalie Goss, Manager of Policy and Research Richard Kelly-Ruetz, Senior Planner Sarah Anderson welcomed all participants, and said that she always is remembering Six Nations' rights and relationship with the water, and noted how our work relates to the water. Lonny Bomberry, Tanya Hill - Montour, and Dawn Russel shared stories about the Grand River and how polluted the Grand River has become. They shared how extremely important the water is for the health and wellbeing of humans and non -human beings. Sarah Anderson thanked all participants from Six Nations for joining the City on the day before National Day for Truth and Reconciliation. All participants introduced themselves, their roles in their organizations, and shared a personal connection to water. 1. HIDDEN VALLEY FLOOD CONTROL ENVIRONMENTAL ASSESSMENT ALTERNATIVE SOLUTIONS Page 650 of 2162 City of Kitchener SNGR Engagement on Sanitary and Stormwater and Parks and Cemeteries initiatives Meeting Notes June 15, 2023 • Monica Mazur presented the Alternative Solutions for the Hidden Valley Flood Control EA. Background (see attached slides for additional information) o The EA focuses on a subwatershed just upstream of the Grand River. The majority of the subwatershed is currently uninhabited. It contains a provincially significant wetland, fish, deer, beavers, and other wildlife habitat. There is a flood and erosion vulnerable area at the downstream part of Hidden Valley Creek at Hidden Valley Road. o The Master Land Use Study was completed in 2019. o The EA is a part of the Secondary Planning Process. There are also a Stormwater Management Strategy and Source Protection/Intake Protection Zone study included in this Secondary Plan process • Phase 1 of the EA was completed in June 2023. The EA is meant to explore alternatives and select a preferred solution for flood risk reduction. Potential Alternative Solutions: o Alternative 1: Do Nothing ■ Required to be considered by provincial EA processes ■ Increased erosion and washouts and flooding would continue o Alternative 2: Reduce flows upstream of wetland ■ Implement stormwater management (SWM) facilities (e.g. ponds) upstream of the wetland ■ Create a SWM facility before development or require developers to implement SWM to overcontrol flows ■ Could negatively impact the wetland by reducing inflows to the wetland. Wetlands are complex systems, and reduced inflows could have a negative impact on habitat o Alternative 3: Flow control structure in Wetland ■ Adding an engineered concrete berm or dam downstream of the wetland ■ This solution is the least favourable for the City: it's very invasive, it would be difficult to get regulatory approval, and it would have negative impacts on the wetland habitat. We are moving away from hard engineering approaches towards naturalized solutions. o Alternative 4: Conveyance improvements downstream of wetland ■ Replacing culverts with infrastructure such as a bridge. Expanding and naturalizing the channel ■ This would be an opportunity to restore habitat connectivity, open up the channel as the current culvert is a barrier ■ This would prevent future road washouts and creek erosion at Hidden Valley Road. • Evaluation Criteria o Integrating SNGR feedback into the EA criteria ■ Integrating Indigenous knowledge and priorities • Looking for ways to bring the wild back to developed areas (ex. Replacing the culvert and making the stream more naturalized) • Showing reciprocity to the earth 2of4 O:\Secured\DM AF\Comm_Engagem ent Page 651 of 2162 City of Kitchener SNGR Engagement on Sanitary and Stormwater and Parks and Cemeteries initiatives Meeting Notes June 15, 2023 • Preliminary Evaluation of Alternatives presented in slides: Option 4 is preliminary preferred solution. • The City will share the preferred alternative report by email, likely in November [Delayed until winter 2024], and there will be a 30 -day response period for feedback on the preferred alternative. SNGR CAP team feedback: Recommendations • Make sure that a strong baseline is taken, both for aquatic life and terrestrial life, so that you are making a decision based on all of the information • If there is any spawning habitat nearby, that should be considered • For restoration, reach out to Kayanase, the Six Nations nursery and greenhouse Concerns • Six Nations is generally against putting infrastructure into any wildlife corridors, which is involved in all of the options other than Alternative 4 • Initial thought was, "why not just replace the culvert." Major concern is how the culvert is designed to ensure that it can hold the bankfull width, and ensure the passage of both aquatic and terrestrial life • It doesn't make sense to try and control the natural, healthy system - the Indigenous perspective would be to work around the river instead of trying to force the river Preference • We have a strong preference for Alternative Four City staff clarified that the recommended design would include consideration of methods to enhance habitat connectively and fish passage, and ensuring the culvert would be wide enough to hold the bankfull width, if technically feasible. Q: You mentioned that this supports future development. What is the development slated for this area? A: The land is privately owned, and we don't know exactly what the property owner would propose to do on this area. This is more a higher-level land use project that allows a developer to bring forward a proposal for development. We as the City are currently trying to set a precedent for what we want to see there, likely middle -density development and some commercial with protection of the environmental feature in the middle. Q: This is also a natural heritage area? How did this area get this designation? A: The wetland in the area is a provincially significant wetland, a number of streams congregate there before unloading into the Grand River. The term "Natural Heritage" is a term that we use to describe the importance of this area as an environmentally valuable feature. Next steps: The consultants will provide specifications for the design alternatives in the Preferred Alternatives Report to be shared by email in November [update: Delayed until winter 2024]. 2. GATHERING ARCHAEOLOGY QUESTIONS FOR KITCHENER'S CEMETERY TEAM 3of4 O:\Secured\DM AF\Comm_Engagem ent Page 652 of 2162 City of Kitchener SNGR Engagement on Sanitary and Stormwater and Parks and Cemeteries initiatives Meeting Notes June 15, 2023 • We have heard interest from rights holders in dialogue with cemetery teams. Does SNGR also have interest in connecting with Kitchener's cemetery team? We can meet directly with Tanya to find out what interest you have in this. • SNGR used to meet with the old Parks director, but haven't met with the new Parks director yet SNGR CAP team feedback: • Tanya Hill -Montour would be interested in another meeting for specific context. • SNGR likes to stay involved in conversations adjacent to cemeteries. • There's a lot of Indigenous burials in the Kitchener area. SNGR keeps Indigenous burials in-situ, SNGR doesn't re -intern into a new burial ground. Q: Have you had previous contact or discussion with the cemeteries team? A: When an archaeological assessment is conducted, then Six Nations is reached out to in particular. Q: When meeting with Niall and the Parks Team in the past, did this include discussions with the cemeteries team? A: I don't think so. Members of the cemetery side did not come to a meeting in 2021. Q: Inviting them into a meeting would be welcome and seeing what comes from the discussion? A: Yes! 3. ROUNDTABLE OF UPDATES Sarah shared that the City appreciated Lauren V's feedback on the Bundle D creek restoration projects. Lauren suggested study parameters that will strengthen the data collected and the chance to expand the impact of the study. Six Nations appreciates providing feedback and help setting the terms of EISs. 4. NEXT STEPS AND ACTION ITEMS 2.1. City to send Preferred Alternative Report for the Hidden Valley EA to SNGR likely in November [Delayed to winter 2024]. 3.1. Next meeting will be in-person, and the City will take the SNGR CAP team out to lunch. 4of4 0:\Secured\DMAF\Comm_Engagem ent Page 653 of 2162 Matrix Solutions Inc. ENVIRONMENT & ENGINEERING KITCHF.NF R. NOTICE OF PUBLIC INFORMATION CENTRE Municipal Class Environmental Assessment Hidden Valley Flood Risk Reduction The Study: The City of Kitchener (the City) retained Matrix Solutions Inc. (Matrix) to provide a Municipal Class Environmental Assessment (EA) for flood risk reduction in the Hidden Valley Creek subwatershed. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The project is being carried out in accordance with the requirements of the Environmental Assessment Act and is planned under Schedule B. The intent of this project is to identify alternative solutions to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. Public Information Centre: A key component of the EA process is consultation with interested stakeholders (public, landowners, and agencies). As part of this study, consultation is being undertaken, and your participation is encouraged. A Public Information Centre (PIC) is planned to share the study background; explain the Environmental Assessment process; outline existing conditions; evaluation criteria; and the alternative solutions. Public Information Centre October 12, 2023 Drop-in format from 5 — 8 p.m. Centreville Chicopee Community Center 141 Morgan Avenue, Kitchener www.kitchener.ca/hiddenvalley www.enciaciewr.ca/hidden-valley-flood-ea We'd like to hear from you: Your input is important to us and can shape the project decision. We invite you to join our upcoming PIC to learn more about the alternative solutions, ask our team questions, and provide feedback. Listening to, and learning from, Indigenous Nations, residents and stakeholders is part of the process. If you are unable to attend the PIC, the presentation boards will be made available on the project website. To submit a comment or question via email, or if you have accessibility requirements to comment on the study, please contact one of the representatives below: Monica Mazur, M.Sc., P.Eng. Karen Hofbauer, M.A.Sc., P.Eng. Project Manager Principal Water Resources Engineer Development Engineering Matrix Solutions Inc. City of Kitchener Phone: 226-314-1932 Phone: 519-741-2600 ext. 7135 khofbauer(a)matrix-solutions.com hiddenvalley(aDkitchener.ca Please note that comments will be maintained for reference throughout the project and will become part of the public record. Under the Municipal Freedom of Information and Protection of Privacy Act and the Environmental Assessment Act, any personal information such as name, address, and telephone number included in a submission will become part of the public record unless the cps&54ci�il2162est that such personal details not be included in the public reco This notice was first issued on September 29, 2023. J Hidden Valley Flood Risk Reduction Class Environmental Assessment Sign -in Sheet PUBLIC INFORMATION CENTRE 1 October 12, 2023 .6 Matrix Solutions Inc. Name Address a Contact Number J o�d o o l cl- ;IeAnz Ale - k/. 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O c� W 440 O OU ■ 11 4 • s, a� r p v W O w W l) m o zi Z U ■ 11 4 • s, m E L .2 a-+ m H .0 a-+ H cr L- 0 0 LL s, J� 0 U L -nM aA W O N U W d V a1 i O C:x a) p d rri N a1 U s= S= O Z3 i C G C6 U t � N N Q C c>3 C6 c O .4 O N O u U +� i r -i C , x {n m Q) O = Ol m Q) N x E O a m O Y � 4-+ c>3 cC � t]A O O O ' E 4, > U O a a) M N > N N 0 O +- C C +-J Q) N M+.+ �_ t O E N ) o L -3 c>3 U 4- 0 u 4A MO O � O 3 O a) a i s to 0 o 3 Q O a � LL s O s, J� i Hidden Valley Flood Risk Reduction Class Environmental Assessment hI'I Cl IF"Xr.R Comment and Feedback Sheet — PIC — October 12, 2023 Matrix Solutions Inc. �y .., .'.1d L. , ... .i i. Your comments are appreciated. Please use this form to provide comments on any aspect of the project that you consider important. Please return your completed form to the front desk, or send by October 27, 2023 to: Monica Mazur, M.Sc., P.Eng. Project Manager City of Kitchener monica.mazur@ kitchener.ca Phone: 519-741-2200 x 7135 Karen Hofbauer, M.A.Sc. P.Eng. Project Manager Matrix Solutions Inc. khofbauer@ matrix-solutions.com Phone: 226-314-1932 Please describe any flooding and/or erosion issues you are aware of related to Hidden Valley Creek. Please provide specific dates and locations if possible. Do you have an opinion on relative weighting for each of the three main evaluation categories (natural, socio-economic / cultural, and technical)? Please provide any additional comment on the study or information that may be useful for the study team. K. Smart Associates has been retained by the owner of 730 Hidden Valley Road to assist with plans for a replacement home. The project team includes the home builder and geotechnical engineer. At this time the preferred solution is Alternative 4, as this has the potential to reduce erosion risks along the creek downstream of Hidden Valley Road and adjacent to our client's property. As discussed at the Information Centre, we have shared details about an existing easement in this section of the creek. We wish to have further discussions with the Class EA study team about stabilization efforts which may be appropriate downstream of the Hidden Valley Roa cu vert crossing. May we contact you to discuss the problems and/or information? Yes 0 No ❑ Note: With the exception of personal information, comments provided above will become part of the public record and a copy of this document may be attached to future reports. Page 672 of 2162 From: Karen Hofbauer To: James211111111111WHiddenVallev (SM) Cc: Dora Vlmm­ Subject: RE: [External] Questions Pertaining to the Hidden Valley Flood Risk Reduction EA Date: Wednesday, October 4, 2023 4:31:56 PM Attachments: imaae001.ona You don't often get email from khofbauer@matrix-solutions.com. Learn why this is important Hi James, Thanks for reaching out, these are very good questions. I'm hoping that you will be able to attend our PIC next week as that will be the best opportunity to answer these questions and any others you may have. At the PIC we will have display boards and figures that we can use for speaking to your questions and concerns. Please connect with one of us at the PIC and we will be prepared for a personal conversation at that time. If you are not able to attend the PIC let us know and we will make other arrangements. Look forward to meeting you. Karen Karen Hofbauer, M.A.Sc., P.Eng. I Principal Water Resources Engineer MATRIX SOLUTIONS INC. A Montrose Environmental Company 713, 650 Woodlawn Rd. W, Guelph, ON N1K 1138 D 226.314.1932 C 519.504.7517 T 519.772.3777 za23 4EC Matrix Solutions Inc■ANADA'SREENESTA Montrose Environmental CompanyPLOYERS From: James Sent: Sunday, October 1, 2023 10:36 AM To: hiddenvalley@kitchener.ca; Karen Hofbauer <khofbauer@matrix-solutions.com> Cc: Dora Subject: [External] Questions Pertaining to the Hidden Valley Flood Risk Reduction EA Monica, Karen, For background, Dora and I (James) are the owners of one of the properties in the Flood -prone Area. Ours is the property the Hidden Valley East Creek runs through into the Grand River. We are in the late planning stages of the development of a new home on the property. The floodplains on the property are probably the largest factor in our design process, so the study is both timely and likely of real consequence. I've attached a GRCA map of our property for reference. Prior to the PIC on October 12, we thought we'd send some of our questions your way. We Page 673 of 2162 appreciate that many of these questions you may not have answers to yet and some will be addressed at the PIC. Nonetheless, the questions are: 1. Do you have historical data on flooding events in the area? If so, can that be shared with us? 2. What data and modelling techniques are being used to assess flood risks and propose solutions? 3. Is climate change modelling factored into the flood risk assessments? 4. What are the alternative solutions being considered to mitigate flood risks? 5. How will these solutions affect the flood -prone properties specifically? 6. Is it possible the floodplain boundaries on our property could change? 7. What is the projected timeline for implementing the flood risk reduction measures? 8. What maintenance plans will be in place to ensure the effectiveness of the flood risk reduction measures? 9. What legal protections or responsibilities exist for property owners in the flood -prone area? 10. How will the effectiveness of the flood risk reduction measures be evaluated over time? We appreciate that it may take many months (or years) to answer these questions fully. Nonetheless, we look forward to being involved in the process. Regards, James. Sent via Superhuman Page 674 of 2162 From: robert To: HiddenValley (SM) Subject: Re: Feedback opinion. Date: Wednesday, October 25, 2023 6:40:16 PM Attachments: imaoe001.ono imaae002.pna imaoe001ono imaae004.pna imaoe005.pno imaae006.pna imaoe007.ono imaae008.pna You don't often get email from Learn why this is important Thank you Monica for taking the time to read and reply to my input on this topic. Hope you have a wonderful day. Get Outlook for Android From: HiddenValley (SM) <HiddenValley@kitchener.ca> Sent: Wednesday, October 25, 2023 2:24:28 PM To: robert Subject: RE: Feedback opinion. Hi Robert, I am well, thank you. I hope you are enjoying the beautiful month of October. Thank you for your input on the Hidden Valley area. In response to your question, while the Hidden Valley Flood Risk Reduction Municipal Class EA process will not be specifically exploring if biking or hiking trails would be permitted and how they might impact the natural features, other studies that are currently being undertaken to support the Hidden Valley Secondary Plan (zoning) will be considering trails and their potential environmental impact. Please follow www.kitchener.ca/hiddenvalley for more information. Although it's not something we're able to include in this particular project, we are taking your feedback into consideration, and I have passed on your feedback to the staff who are responsible for the Hidden Valley Secondary Plan. Thanks, Monica Mazur, M.Sc., P.Eng. Project Manager) Development Engineering I City of Kitchener 519-741-2200 ext. 7135 1 TTY 1-866-969-9994 1 monica.mazur@kitchener.ca From: robert Sent: Sunday, October 1, 2023 12:11 PM To: HiddenValley (SM) <HiddenValley@kitchener.ca> Page 675 of 2162 Subject: Feedback opinion. iYou don't often get email from am why this is im op rtant Hi Monica how are you, hope you had a great weekend. Would like to input on hidden valley area. I believe we should be focusing on making what is left of hidden valley into a natural park. Since city planning revolves around developers and profit gouging, there is very little consideration for future societal deprivation. Less greenspace with excessively increasing population equals a much less considerate society as many city's historic plans have proven. This should be an area for generations to enjoy and not just another little Oasis for the financially well off. Thank you and have a good day. Page 676 of 2162 Monica Mazur From: Karen Hofbauer <khofbauer@matrix-solutions.com> Sent: Thursday, October 12, 2023 10:55 AM To: Zaid Kashif Al Ghitta; HiddenValley (SM) Cc: DavidOWNEWSteve11offENEM ScottXMMNMW Gerald= Subject: RE: [External] Public Information Centre - Inquiry Attachments: 2023-10-12 Hidden Valley Flood Control EA - PIC Boards.pdf II You don't often get email from khofbauer@matrix-solutions.com. Learn why this is important Hi Zaid, Please find attached the PIC boards that will be shared tonight. Regards, Karen Hofbauer, M.A.Sc., P.Eng. I Principal Water Resources Engineer MATRIX SOLUTIONS INC. A Montrose Environmental Company D 226.314.1932 C 519.504.7517 2023 Canada's Greenest Employers From: Zaid Kashif Al Ghitta <zkashif@ksmart.ca> Sent: Wednesday, October 11, 2023 11:07 AM To: hiddenvalley@kitchener.ca Cc: Karen Hofbauer <khofbauer@matrix-solutions.com>; David Harsch <dharsch@ksmart.ca>; Steve Jefferson <steve@ksmart.ca>; Scott Brubacher <scott@clbuilders.ca>; Gerald Martin <gerald@clbuilders.ca> Subject: [External] Public Information Centre - Greetings, I hope this e-mail finds you well. My name is Zaid Kashif Al Ghitta, and I am a Planner with K. Smart Associates Limited. We are a Planning and Engineering Consulting firm in Kitchener. We have been retained by the landowner atm min Kitchener to attain a GRCA permit for potential development on the property. The lot is within your Municipal Class Environmental Assessment, and as such, we will be at tomorrow's Public Information Centre. Is there any documentation or materials that can be shared with us for our review prior to our attendance? Best, Zaid Kashif Al Ghitta, BES Land Use Planner — K. Smart Associates Limited 85 McIntyre Dr. Kitchener ON N2R 1H6 http://www.ksmart.ca T: 519.748.1199 x231 I F: 519.748.6100 zkashif@ksmart.ca Page 677 of 2162 Monica Mazur From: Jordon Sent: Tuesday, October 24, 2023 11:45 AM To: Monica Mazur Subject: Hidden Valley Flood Risk Reduction EA comments Attachments: K -W Record newspaper October 21, 1993 page B1.pdf [You don't often get email from om. Learn why this is important at https://aka.ms/LearnAboutSenderldentification ] As mentioned in conversation at the drop-in PIC, I distinctly remember personally witnessing one or more occurrences of the road washing out, rather spectacularly, in the low spot between 11M, during summer rain events in the late 1980s. The common quick fix made by city crews at the time was to dump some extra rip rap as scour protection. Unfortunately, I cannot find any newspaper article or otherwise that documents a particular event. It probably happened sometime after the dirt road was first covered with an impervious tar & chip surface treatment in the mid -'80s, during the period when the city's own forces (not contractors) did all maintenance work themselves. Elderly family members of mine don't remember flooding or erosion happening further back in time, pre -1958, when it was part of rural Waterloo Township, outside of city limits. The only clue that corroborates my own memory of flooding is a columnist's remark about city crews replacing a culvert maybe around 1990; the clipping is attached to this message, with added highlighting. Not sure of the relevance, but one should be mindful that the driveway to was substantially realigned by its second homeowner around the late '80s or early'90s. Originally, it was a straight configuration, and had street frontage nearly opposite to 730 Hidden Valley Road. It was later changed to the curving gated entrance, about 200 -feet further south, now crossing over the creek and facing 748 Hidden Valley Road. The contribution of storm water runoff from the roadway's long, steep hill with essentially no curb/gutter system, and only a single catchbasin at the bottom, is likely substantial. The road surface elevation drops, say, 100 feet over a 1000 feet span, probably yielding a steep 10% grade. This collects and channels a lot of rain water, especially after the road received its first asphalt paving, sometime in the late 2000s or early 2010s. Additional background information as recommended research: Full engineering specifications for the two existing concrete box culverts beneath Hidden Valley Road (the segment designated a service road until MTO conveyed it to the city) including former CSPs that these replaced when Highway 8 was first built, are found in the original set of drawings for MTO contract 61-108, work project 35-56 & 112-58, undertaken by E & E Seegmiller Construction. Details therein were not all carried forward to recent documentation when the highway was reconstructed/widened in 2008. Certified copies of said contract drawings can be obtained from MTO's engineering west divisional office in London, or through the Archives of Ontario library. The University of Waterloo Library's Special Collections & Archives holds the K -W Record Photographic Negative Collection. Reference code SCA98-GA68-1961-61-617 contained some historical pictures of concrete box culverts under construction for "north" Hidden Valley Creek, showing placement of very long, narrow concrete cribbing/formwork in progress. Images can be obtained using the form at https://can0l.safelinks.protection.outlook.com/?url=https%3A%2F%2Fuwaterloo.ca%2FIibrary%2Fspecial-collections- archives%2Frequest- Page 678 of 2162 reproduction&data=05%7C01%7Cmonica.mazur%40kitchener.ca%7Cd7d055ae3f9e4988079308dbd4a84dcb%7Cc703d7 9153f643a59255622eb33a 1bOb%7CO%7CO%7C638337591698030153%7CUnknown%7CTW FpbGZsb3d8eyJW Ijoi MC4wLj AwMDAi LCJQljoiV21u MzIiLCJBTi 161k1haWwiLCJXVC16Mn0%3D%7C1000%7C%7C%7C&sdata=LJ9b1StX%2BDTkzAG2UDdS 71 PO Hq LpccrHQQH03epO%2FWg%3 D&reserved=0 Because Matrix Solutions was also working on city contract Q22-079, the consultant's study team ought to look for any characteristic similarities between the three different nearby creeks that all drain into the westerly side of the Grand River. In particular, retrieving engineering records from past city contract T96-103 would give a better understanding of historical context to watercourse erosion control measures previously implemented. 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O mad r0„ >. tlD'O =S m w 'd�•jOo wQ U) boto Cd 0- 0 .o aD CL as :°^ >a>,iotkD 40 0 bob 'ti3"Ob� O� N w of F V 0 l$ -0 Y, > as .Y.. Id>CL ami CD . b A 0 > obD Y Y ad a) 03 b CD ti0 O o >. as 0 x [CD E Ox a34O b N w U (n co --o c6 cd [ c 3 3 0 0 > Y� O s. a ai o >. bD OU Z > O Vn U 3 1/22/24, 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR Select Language Powered by Google Translate • Engage Cambridge • Engage Kitchener • Engage Waterloo • Engage Region of Waterloo • Engage Woolwich Search •()MonicaMazur o My Account o Edit project o Projects • Dashboard o Logout Home / Engage Kitchener / Hidden Valley Flood Risk Reduction Environmental Assessment Hidden Valley Flood Risk Reduction Environmental Assessment In -V ® z Page 681 of 2162 https://www.engagewr.ca/hidden-valley-flood-ea?tool=news feed#tool tab 1/8 ♦ 427 �. 'Y y n j•.- Vri Home / Engage Kitchener / Hidden Valley Flood Risk Reduction Environmental Assessment Hidden Valley Flood Risk Reduction Environmental Assessment In -V ® z Page 681 of 2162 https://www.engagewr.ca/hidden-valley-flood-ea?tool=news feed#tool tab 1/8 1/22/24, 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR The intent of this project is to identify a preferred solution to reduce existing flood risks and support future development in the Hidden Valley community. There will be opportunity to learn about and give feedback during the study process. We will host a public information centre that you can attend. You are also welcome to contact the consultant and/or project manager at any time. We will include your comments on the following in the project file report: • The criteria for evaluating the project and the preliminary alternatives • The proposed flood mitigation alternatives, the final evaluation criteria, and the preferred solution If you would like to receive updates about this project, please add your email to the Stay Informed box and click 'Subscribe'. Background The Hidden Valley Creek subwatershed includes both woodland and wetland areas. It is an environmentally sensitive area, home to species at risk habitats and a warmwater fishery. There are several flood vulnerable areas and erosion vulnerable area in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. The area downstream has experienced past flood and erosion impacts. These are related to specific rainfall or runoff events and the release of natural debris (examples: beaver dams or natural debris jams). This study is part of our secondary planning process. Future development in the area will follow both the current Hidden Valley Land Use Master Plan and our ongoing secondary planning process. NEWS FEED Page 682 of 2162 https://www.engagewr.ca/hidden-val ley-flood-ea?tool=news feed#tool tab 2/8 1/22/24. 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR All unpublished Newsfeed items are shown as "Draft". Only admins will be able to see it in the preview mode. Public Information Centre materials now available 19 Oct 2023 ® u Thank you to everyone who joined us at our Public Information Centre earlier this month. If you were unable to make it, here are the materials we shared: Hidden Valley Flood Risk Reduction PIC boards. Your input on this study is valuable and appreciated. Please review those materials and, if you have any feedback, email your comments to the project team. We are able to accept comments until October 30, 2023. If you haven't already, subscribe to the project newsletter to get updates. Add your email to the Stay Informed box on this page and click'Subscribe'. Public Information Centre Oct. 12, 2023 27 Sep 2023 M -W ® u The City of Kitchener (the City) retained Matrix Solutions Inc. (Matrix) to provide a Municipal Class Environmental Assessment (EA) for flood risk reduction in the Hidden Valley Creek subwatershed. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The project is being carried out in accordance with the requirements of the Environmental Assessment Act and is planned under Schedule B. The intent of this project is to identify alternative solutions to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. Public Information Centre October 12, 2023 Drop-in from 5 to 8 p.m. Centreville Chicopee Community Center (141 Morgan Avenue, Kitchener) Page 683 of 2162 https://www.engagewr.ca/hidden-val ley-flood-ea?tool=news feed#tool tab 3/8 1/22/24, 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR A key component of the EA process is consultation with interested stakeholders (public, landowners, and agencies). As part of this study, consultation is being undertaken, and your participation is encouraged. A Public Information Centre (PIC) is planned to: • share the study background • explain the Environmental Assessment process • outline existing conditions • evaluation criteria • and the alternative solutions We'd like to hear from you Your input is important to us and can shape the project decision. We invite you to join our upcoming PIC to learn more about the alternative solutions, ask our team questions, and provide feedback. Listening to, and learning from First Nations, residents and stakeholders is part of the process. If you are unable to attend the PIC, the presentation boards will be made available on this webpage. To submit a comment or question via email, or if you have accessibility requirements to comment on the study, please contact one of the representatives below: Monica Mazur, M.Sc., P.Eng. Project Manager (Development Engineering) City of Kitchener Phone: 519-741-2600 ext. 7135 hiddenvalley@kitchener.ca Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer Matrix Solutions Inc. Phone: 226-314-1932 Email: khofbauer@matrix-solutions.com Please note that comments will be maintained for reference throughout the project and will become part of the public record. Under the Municipal Freedom of Information and Protection of Privacy Act and the Environmental Assessment Act, any personal information such as name, address, and telephone number included in a submission will become part of the public record unless the comments specifically request that such personal details not be included in the public record. Page 684 of 2162 https://www.engagewr.ca/hidden-val ley-flood-ea?tool=news feed#tool tab 4/8 1/22/24, 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR Notice of Commencement 13 Jun 2023 O ® V Municipal Class Environmental Assessment Hidden Valley Flood Risk Reduction The City of Kitchener (the City) retained Matrix Solutions Inc. (Matrix) to provide a Municipal Class Environmental Assessment (EA) for flood risk reduction in the Hidden Valley Creek subwatershed. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The Process The project is being carried out in accordance with the requirements of the Environmental Assessment Act and it is being planned under Schedule B. The intent of this project is to identify solutions and design alternatives to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. A key component of the EA process will be consultation with interested stakeholders (public, landowners, and agencies). Matrix will conduct a detailed background review and hydrologic/hydraulic analysis of the study area and identify potential solutions to reduce flood hazard. Upon completion of the analysis, Matrix will prepare a Project Report for the City and for submission to the Ministry of the Environment, Conservation and Parks (MECP), which will be available for public review for a period of 30 calendar days. All interested parties will have an opportunity to attend a Public Information Centre (PIC) meeting hosted prior to the final decisions on the proposed solutions. Notification of the PIC will be provided through email and postings on the City's website. Study Area The Hidden Valley Creek subwatershed is approximately 200 ha located in southeast Kitchener (see Figure 1). The Hidden Valley Creek subwatershed contains a large wetland/woodland environmental complex, which holds classifications of a Provincially Significant Wetland (PSW), Environmentally Sensitive Policy Area (ESPA), and Core Environmental Feature (CEF). Within the study area there are Regionally Significant Woodland and Significant Valley, species at risk habitat, and a warmwater fishery. In addition to being an environmentally sensitive area, the Hidden Valley ESPA/PSW is the hydrologically dominant landscape feature in the subwatershed. The area downstream of the Hidden Valley ESPA/PSW has experienced past flood and erosion impacts related to both specific rainfall -runoff events and/or the release of natural debris -blockages (e.g., beaver dams or natural debris jams) within the wetland feature. Page 685 of 2162 https://www.engagewr.ca/hidden-val ley-flood-ea?tool=news feed#tool tab 5/8 1/22/24, 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR Public Feedback Public, Indigenous, and agency consultation is a key component of the Class EA process, and Matrix is interested in hearing any comments or concerns that you may have about this study. To submit a comment or question via email, or if you have accessibility requirements to comment on the study, please contact one of the representatives below: Monica Mazur, M.Sc., P.Eng. Project Manager (Development Engineering) City of Kitchener Phone: 519-741-2600 ext. 7135 hiddenvalley@kitchener.ca Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer Matrix Solutions Inc. Phone: 226-314-1932 Email: khofbauer@matrix-solutions.com Please note that comments will be maintained for reference throughout the project and will become part of the public record. Under the Municipal Freedom of Information and Protection of Privacy Act and the Environmental Assessment Act, any personal information such as name, address, and telephone number included in a submission will become part of the public record unless the comments specifically request that such personal details not be included in the public record. Notice of Completion - Draft G. 27 Sep 2023 Report approved, public comment period open - Draft G. 27 Sep 2023 Page 686 of 2162 https://www.engagewr.ca/hidden-val ley-flood-ea?tool=news feed#tool tab 6/8 1/22/24. 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment i EngageWR Page last updated: 19 Oct 2023, 04:44 PM STAY INFORMED scribe for project updates 10 members of your community are following this project Lifecycle Notice of study commencement We are notifying the public, Indigenous communities and key stakeholders about this study Evaluate alternatives and identify a preferred solution We are considering a range of alternatives to identify a preferred solution Open for feedback Attend our public information centre to learn more about this project and give your feedback on the potential alternative solutions Review and confirm solution We are reviewing the feedback we received before selecting the preferred solution Notice of Completion We are notifying the public, Indigenous communities and stakeholders that the selection of the preferred alternative is complete Report published The planning process is documented in the Project File Report, now available for review for 30 calendar days. Study complete Page 687 of 2162 https://www.engagewr.ca/hidden-val ley-flood-ea?tool=news feed#tool tab 7/8 1/22/24, 3:15 PM Hidden Valley Flood Risk Reduction Environmental Assessment I EngageWR The public comment period has ended and the study is complete Documents Hidden Valley Flood Control EA - PIC Boards (8.48 MB) (pdf) Who's Listening Monica Mazur, M.Sc., P.Eng. I Project Manager (Development Engineering) „ City of Kitchener Phone 519-741-2200 x7135 Email hiddenvalley@kitchener.ca Karen Hofbauer, M.A.Sc., P.Eng. al Water Resources Engineer Matrix Principal g Solutions Inc. Matrix Solutions Inc. Phone 226-314-1932 Email khofbauer@matrix-solutions.com Important Links p Hidden Valley (kitchener.ca) Terms of Use Privacy Policy Moderation Policy Accessibility Technical Support Site Map Cookie Policy Page 688 of 2162 https://www.engagewr.ca/hidden-valley-flood-ea?tool=news feed#tool tab 8/8 Climate Change and Environment Committee Committee Minutes October 19, 2023, 4:00 p.m. Electronic Meeting Present: Councillor A. Clancy, Member Councillor S. Davey, Member M. Garner, Vice -Chair K. Bockasten, Member J. Clary -Lemon, Member G. Johannesson, Member B. Kurczak, Member K. Loveless, Member V. Nhio-son, Member M. Shafii, Member F. Tohidi, Member Staff: A. Cipriani, Corporate Sustainability Officer N. Goss, Manager, Policy & Research S. Lodenquai, Committee Administrator M. Mazur, Project Manager Development Engineering C. Musselman, Senior Environmental Planner 1. Commencement The Climate Change and Environment Advisory Committee held a meeting this date commencing at 4:00 p.m. In the absence of the Chair, Kyle Loveless was elected as Chair Pro Tem for the October 19, 2023 meeting. The meeting began with a Land Acknowledgement given by the Chair. 2. Discussion Items 2.1 Q23-045 Hidden Valley Flood Risk Reduction Environmental Assessment, DSD -2023-453 1 Page 689 of 2162 The Committee considered Climate Change and Environment report DSD -2023- 453, dated October 5, 2023 recommending preferred alternative solution #4 for flood risk reduction in the Hidden Valley Creek subwatershed, as presented by M. Mazur. On motion by K.Loveless That the Climate Change and Environment Committee supports the preferred alternative solution for flood risk reduction in the Hidden Valley Creek subwatershed. Carried 2.2 Presentation of Impact Report to the Climate Change & Environment Committee - Reep Green Solutions Patrick Gilbride and Lisa Truong (in place of Mary Jane Patterson) attended the meeting and presented the annual Reep Green Solutions Impact Report. 2.3 CCEC Sub -Committee Assignments and Updates It was decided that B. Kurczak would step down from the Buildings and District Energy sub -committee and B. Unrau will step in. General sub -committees were provided as available. 3. Information Items 4. Adjournment On motion, this meeting adjourned at 5:36 p.m. Shannon Lodenquai Committee Administrator 2 Page 690 of 2162 Staff Report r NJ :R Development Services Department www.kitchener.ca REPORT TO: Climate Change and Environment Committee DATE OF MEETING: October 19, 2023 SUBMITTED BY: Natalie Goss, Manager Policy and Research 519-741-2200 ext. 7648 PREPARED BY: Monica Mazur, Project Manager, 519-741-2200 ext. 7135 WARD(S) INVOLVED: Ward 3 DATE OF REPORT: October 5, 2023 REPORT NO.: DSD -2023-453 SUBJECT: Hidden Valley Flood Risk Reduction Municipal Class Environmental Assessment RECOMMENDATION: That the Climate Change and Environment Committee supports the preferred alternative solution for flood risk reduction in the Hidden Valley Creek subwatershed. REPORT HIGHLIGHTS: • The purpose of this report is to present the preliminary alternatives considered for flood risk reduction in the Hidden Valley creek subwatershed. • The key finding of this report is that implementing conveyance improvements downstream of the wetland is the preferred solution. • The recommendation has no impact on the Capital or Operating Budget. Funds are currently available from Development Charges. • Community engagement included is First Nations consultation, a Public Information Center on October 12, an Engage Page, and a page for Hidden Valley on the City of Kitchener website. • This report supports Cultivating a Green City Together: Focuses a sustainable path to a greener, healthier city; enhancing & protecting parks & natural environment while transitioning to a low -carbon future; supporting businesses & residents to make climate -positive choices. BACKGROUND: The City of Kitchener (the City) retained Matrix Solutions Inc. (Matrix) to provide a Municipal Class Environmental Assessment (EA) for flood risk reduction in the Hidden Valley Creek subwatershed. There are several flood vulnerable areas and erosion vulnerable reaches in the downstream portion of the Hidden Valley Creek subwatershed close to Hidden Valley Road. This EA is being undertaken to define a flood risk reduction solution to reduce existing flood risks and support future development in the Hidden Valley community. The project is being carried out in accordance with the requirements of the Environmental Assessment Act and it is being planned under Schedule B. The intent of this project is to identify solutions *** This information is available in accessible formats upon request. *** Please call 519-741-2345 or TTY 1-866-969-9994 for assistance. Page 691 of 2162 and design alternatives to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. The Hidden Valley Creek subwatershed is approximately 200 ha located in southeast Kitchener (see Figure 1). The Hidden Valley Creek subwatershed contains a large wetland/woodland environmental complex, which holds classifications of a Provincially Significant Wetland (PSW), Environmentally Sensitive Policy Area (ESPA), and Core Environmental Feature (CEF). Within the study area there are Regionally Significant Woodland and Significant Valley, species at risk habitat, and a warmwater fishery. In addition to being an environmentally sensitive area, the Hidden Valley ESPA/PSW is the hydrologically dominant landscape feature in the subwatershed. The area downstream of the Hidden Valley ESPA/PSW has experienced past flood and erosion impacts related to both specific rainfall -runoff events and/or the release of natural debris -blockages (e.g., beaver dams or natural debris jams) within the wetland feature. Figure 1 REPORT: Four preliminary alternatives are considered to reduce the flood hazard in the vulnerable downstream reaches of the Hidden Valley Creek subwatershed. Alternative 1: Do Nothing Alternative 1 proposes a "Do Nothing" scenario in which no changes are made, as per requirements of the Municipal Class EA process. Based on available hydrologic modeling (flows) and hydraulic modeling (elevations), a property downstream of the wetland is flooded during the 1:25 year event and Hidden Valley Road is overtopped during the 1:10 year event under existing conditions. Prior occurrences of flooding at the subject locations are thought Page 692 of 2162 to have been, at least in part, the result of beaver dam failure within the wetland. Beaver dams and other partial debris jams within the wetland are still at potential risk for failure under existing conditions. Alternative 2: Reduce Flows Upstream of Wetland Alternative 2 includes the potential implementation of flow attenuation measures upstream of the Hidden Valley wetland, such as stormwater controls to temporarily detain some runoff volume and release it at a reduced rate. Much of the existing development in the headwaters of the subwatershed occurred prior to the large-scale adoption of stormwater management practices; there may be some potential to retroactively implement flow reduction measures for these areas as either standalone facilities (i.e., new facilities to service existing development) or in conjunction with future development. Several new developments are currently proposed upstream of the Hidden Valley wetland that will include stormwater management mitigation measures (e.g., control of post - development flows back to existing rates). These facilities could potentially be modified to "over -control" runoff from newly developing areas (e.g., control of post -development flows to below existing rates) to help reduce flood potential downstream. Alternative 3: Flow Control Structure in Wetland Alternative 3 includes constructing a flow control structure, such as a dam, within the Hidden Valley wetland to create / utilize storage volume above the normal wetland water levels to provide peak flow attenuation for surface water flows to / through the feature. Under existing conditions, it is speculated that naturally occurring beaver dams and/or vegetative debris jams (i.e., deadfall) have built up and subsequently, either partially or completely, at various times over the past decade, resulting in or exacerbating downstream flooding. Engineered flow control measures would replicate the naturally occurring conditions within the wetland while increasing the reliability of the structure. Attenuation within the wetland would reduce the peak flow rate downstream and mitigate future flooding. Alternative 4: Conveyance Improvements Downstream of the Wetland (preferred alternative) Alternative 4 would entail improving conveyance systems through the Hidden Valley Creek corridor downstream of the wetland to safely pass elevated flows across private property and Hidden Valley Road, reducing flooding. There are two intact engineered crossings constricting flow downstream of the Hidden Valley wetland, a driveway crossing on private property and the municipal road crossing under Hidden Valley Road. Hidden Valley Road does not meet MTO drainage design standards for local roadway crossings under existing conditions, and frequent overtopping of the roadway increases the potential for channel erosion downstream of the crossing. This is of particular interest as the channel runs through or adjacent to other private properties downstream of Hidden Valley Road, and long-term erosion could impact these properties. Improving conveyance at Hidden Valley Road would also improve erosion and long-term slope stability around and immediately downstream of the crossing. Evaluation Criteria Based on positive collaborative experiences of recent City of Kitchener projects, this Study proposes to adopt the "Framework for incorporating First Nations rights holder priorities and Page 693 of 2162 knowledge into an Environmental Assessment" (City of Kitchener and Stantec, 2023). The intent of using this framework is to incorporate rights holder priorities and knowledge into the EA process and achieve a balance of alternative evaluation criteria weighting between ecological, technical, socio-economic and cultural considerations. The integration of indigenous knowledge, lands, land claims, and treaty rights are not specifically identified as a stand-alone category, but rather woven into and throughout all of the considerations identified below. City staff met with the Six Nations of the Grand River and the Mississauga's of the Credit First Nation in September 2023 to present the alternative solutions and receive their input on their preferred solution. The preferred solution at the time of writing this report is Alternative 4. Input from the public at the Public Information Center on October 12th, 2023 will also be incorporated in the decision-making process when confirming the preferred solution. A preliminary evaluation of alternative solutions is presented in Table 1 below. Table 1. Preliminary Evaluation of Alternative Solutions Natural Environment U 0 Socio-economic and � � O Cultural Environment Technical Environment C & 0 STRATEGIC PLAN ALIGNMENT: This report supports Cultivating a Green City Together: Focuses a sustainable path to a greener, healthier city; enhancing & protecting parks & natural environment while transitioning to a low -carbon future; supporting businesses & residents to make climate -positive choices. FINANCIAL IMPLICATIONS: Capital Budget — The recommendation has no impact on the Capital Budget. Funds are currently available from Development Charges. Operating Budget — The recommendation has no impact on the Operating Budget. COMMUNITY ENGAGEMENT: INFORM — A Notice of Study Commencement and Notice of Public Information Center have been shared with the public, stakeholders, and rights holders. Project information can be found on www.kitchener.ca/hiddenvallev and www.engagewr.ca/hidden-valley-good-ea. CONSULT — Page 694 of 2162 First Nations Consultation: City staff met with the Six Nations of the Grand River and the Mississauga's of the Credit First Nation in September 2023 to present the alternative solutions, receive input on their preferred solution, and incorporate rights holder priorities and knowledge into the EA process. Public Information Centre: A key component of the EA process is consultation with interested stakeholders (public, landowners, and agencies). As part of this study, consultation is being undertaken. A Public Information Centre (PIC) is planned on October 12 to share the study background; explain the Environmental Assessment process; outline existing conditions; evaluation criteria; and the alternative solutions. PREVIOUS REPORTS/AUTHORITIES: • Hidden Valley Land Use Master Plan • Ongoing Hidden Valley Secondary Plan • Staff Report (No. DSD -19-133) to Planning & Strategic Initiative Committee on June 10, 2019 for the Neighbourhood Planning Review: Hidden Valley Land Use Master Plan. REVIEWED BY: Carlos Reyes, Manager Development Engineering ATTACHMENTS: Attachment A — Notice of Study Commencement Attachment B — Notice of Public Information Centre Page 695 of 2162 Page 696 of 2162 Photo 1. Inlet to Wabanaki Pond Photo 3. Hidden Valley West Creek armour stone bank Photo 5. Hidden Valley North Creek typical cross section ta< Photo 2. Hidden Valley West Creek Outfall Photo 4. Hidden Valley West Creek naturalized banks with undercutting Photo 6. Hidden Valley ESPA/PSW 35495-504 Site Photographs 2023-12-14finaI.pptx 2 Page Cly/ OT * IbLInC. Photo 7. Reservoir behind beaver dam. Photo 9. Hidden Valley Road Crossing, upstream view Photo 11. Erosion Noted upstream of Hidden Valley Road 35495-504 Site Photographs 2023-12-14 finaI.pptx Photo 8. Damaged crossing downstream of Hidden Valley ESPA/PSW Photo 10. Hidden Valley Road Crossing, downstream view Photo 12. 735 Hidden Valley Road Driveway crossing, view downstream Page :�ti °ofi �%Inc. Photo 13. 735 Hidden Valley Road Driveway bypass culverts, view upstream 35495-504 Site Photographs 2023-12-14 finaI.pptx Photo 14. 735 Hidden Valley Road Driveway low flow culvert, view upstream Page :�y °ofi �%Inc. Page 700 of 2162 U) 0 :t! O U c U) X W 3 3 OWZ O •i Q Lug! 16. = g 9 S.sa�s Ea LL W N - - = m ccd 0 W $ o Y i ypa U H L � 2 8 W - > U � y ix w C H - 2 _ g 3 3 g 9 S.sa�s °- --_ —___ g itl Po682 � �� / V2 a3ise Z d � v is W W i f 0'15 o U s� J �w - o—'�—��u¥- sm�- ---®o a a e ery Z I River 117 12, 1 0311 28]121 28]501 28]311 28]501 00011141 0391 0 78 2981 0241 2881 1.131 ®®®®® ®®®®® ®®®®® ®®®® ®®®® ® ®®®®®® ®®®®® ®®®®® ®®®® ®®®®®® ®®®® ®®®®®® ®®®® ®®®®®® ®®®® ®®®®®® ®®®® ®®®®®® ®®®® ®®®®®® ®®®® ®®®®®® ®®®® ®®®®®® I River 117 12, 1 0311 28]121 28]501 28]311 28]501 00011141 0391 0 78 2981 0241 2881 1.131 --------------- ®®®® ®®®®®® I River 117 12, 1 0311 28]121 28]501 28]311 28]501 00011141 0391 0 78 2981 0241 2881 1.131 Page 702 of 2162 --------------- Page 702 of 2162 ri�sn�a�ms®isn�a�a�aw Page 703 of 2162 HEC -RAS Plan: Alternative 4 River: River Reach: River Page 704 of 2162 --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- --------------- Page 704 of 2162 Page 705 of 2162 Crossing Dimensions Hydraulic Results Existing Conditions Hidden Valley Road Results 10 -Year Walter Level (m) 293.43 HW/D (600 mm culvert) 5.82 Freeboard (m) -0.09 Cover (m) 1.68 Alternative 4 Hidden Valley Road Results 10 -Year Walter Level (m) 291.06 H W/D 0.54 Freeboard (m) 2.28 Cover (m) 1.73 Page 706 of 2162 Hidden Valley Road 735 Diveway Overflow Low Flow Overflow Low Flow Diameter 900 mm 600 mm Two 1,450 mm span by 8 770 mm Upstream invert (m) 290.77 289.94 294.69 293.74 Downstream Invert (m) 287.31 287.31 294.01 292.88 Hydraulic Results Existing Conditions Hidden Valley Road Results 10 -Year Walter Level (m) 293.43 HW/D (600 mm culvert) 5.82 Freeboard (m) -0.09 Cover (m) 1.68 Alternative 4 Hidden Valley Road Results 10 -Year Walter Level (m) 291.06 H W/D 0.54 Freeboard (m) 2.28 Cover (m) 1.73 Page 706 of 2162 Flow (m3/s) Water Surface Elevation Upstream of Road (m) 0 50 -year 0.5 291.51 1 291.81 1.5 292.16 2 292.56 2.5 293.06 3 293.42 3.5 293.49 4 293.55 4.5 293.6 5 293.64 6 293.73 7 293.81 8 293.88 9 293.94 10 294 12 294.13 14 294.24 16 294.35 Water Level Upstream of Hidden Vallev Road Road Crest Elevation 293.34 m Return Storm Flow (m3/s) Water Surface Upstream of Road 50 -year 15.30 294.31 20 -year 6.43 293.76 10 -year 3.08 293.43 5 -year 1.33 292.04 2 -year 0.31 291.51 Page 707 of 2162 294.5 294 293.5 293 E 292.5 292 291.5 291 0 Hidden Valley Road Rating Curve y = 0.541 n(x) + 292.79 Flow (cros) 10 12 14 16 18 Page 708 of 2162 Page 709 of 2162 Ic 4Q Yol 6 a Q p w w .� a o aie E enr pp SOU. L'S � N 0PP .�.r y. w/ 9�NiRIBUTARV'- ® GD b' '= O'�N C • as rN w a D `� O E a�abee D�Ne 0 0 O Q 60 V o` 11 o 01 'm d - -co � 'm m _ m oo E 20 o — °- — a ° .�..I o o 2 S o 3:°� o a m ° ° N a o Q L/ ° Q o Q O z 'm °O o o o m O >� �''� �J m Ic 4Q Yol 6 a Q p w w .� a o aie E enr pp SOU. L'S � N 0PP .�.r y. w/ 9�NiRIBUTARV'- ® GD b' '= O'�N C • as rN w a D `� O E a�abee D�Ne O 00 60 V o` 11 o 01 foo C _ m a s o o C z m u O Ic 4Q Yol 6 a Q p w w .� a o aie E enr pp SOU. L'S � N 0PP .�.r y. w/ 9�NiRIBUTARV'- ® GD b' '= O'�N C • as rN w a D `� O E a�abee D�Ne HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Sample Empirical probability formula : F[X(k)]=(k-0.40)/(n+0.20) (Cunnane) Inactive data (in italic) are included in the empirical probability calculation. Nr. Observation Identifier Probability empirical 1 0.34 2012 0.5490 2 6.52 2013 0.9412 3 2.9 2014 0.8431 4 0.05 2015 0.0588 5 0.4 2016 0.6471 6 0.06 2017 0.2549 7 0.27 2018 0.3529 8 0.31 2019 0.4510 9 0.05 2020 0.1569 10 0.81 2021 0.7451 Code Page 711 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Basic statistic Number of observations Minimum Maximum Mean Standard deviation Median Coefficient of variation (Cv) Skewness coefficient (Cs) Kurtosis coefficient (Ck) Active data 10 0.0500 6.52 1.17 2.06 0.325 1.76 2.40 4.60 Page 712 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Test for independence (Wald-Wolfowitz) Hypotheses : HO : The observations are independent H1 : Observations are dependent (autocorrelation of order 1) Results : Statistics value p -value : Conclusion We accept HO at a significance level of 5 %. JUS = 1.75 p = 0.0807 Page 713 of 2162 BYFRA&PL[S (c) INRS-ETE, 2002 Hidden Valley EA Hidden Valley E/\ 5�5 — ---�----'�— -----'------- . . . . . . 8 — ---�----'�— ' ' �-----'�------ ---| ---- | — . . -----------| ------ 5 ------'�-----L---''-- ' ' —11-----' ------- 4.5 ------'L----'L---''L— —' L------ . . . . . ------------ . 4 ------'�---------'�— ' ' -------'�------ E' ' ' ' ' �~ I5 ------------- ----------- �----'-- --'�-----'------- � . . . . . �e 3 ------'�-----�----f— ---�-----f------ 2�6 ------'^-----^----~'— ---'~-----~'------ . . . . . . . 2 ------'�-----|----'�— ' ---------'------ . . . . . . 1.5 ------'�-----�----'�— ' I ----I----- ------- . . . . . . � ------------- ------�----'�— . '�---------'�------ 1 ' ' 0 � ------'�-----�----'-- —'�----�-----'------- C) o o C -A Lfj IDD 19) cr) 17) 6 o o o 6 6 6 o 61 Non'exoeodonoe probability (Normal paper/ Cunnano` @HrFnAmPLuS Page 714 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Comparison of characteristics between function and sample Minimum Maximum Mean Standard deviation Median Coefficient of variation (Cv) Skewness coefficient (Cs) Kurtosis coefficient (Ck) Charac. of the population 0.000311 None 2.25 235 0.306 105 N/D N/D Charac. of the sample 0.0500 6.52 1.17 2.06 0.325 1.76 2.40 4.60 Page 715 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Log -Pearson type 3 (WRC) Results of the fitting Number of observations: 10 Parameters alpha 5.934830 lambda 18.094212 In -3.507068 Quantiles N/D q = F(X) : non-exceedance probability T = U(1 -q) N/D T q 10000.0 0.9999 2000.0 0.9995 1000.0 0.9990 200.0 0.9950 100.0 0.9900 50.0 0.9800 20.0 0.9500 10.0 0.9000 5.0 0.8000 3.0 0.6667 2.0 0.5000 1.4286 0.3000 1.2500 0.2000 1.1111 0.1000 1.0526 0.0500 1.0204 0.0200 1.0101 0.0100 1.0050 0.0050 1.0010 0.0010 1.0005 0.0005 1.0001 0.0001 XT 892 290 175 50.3 28.3 15.4 6.43 3.08 1.33 0.644 0.306 0.135 0.0847 0.0463 0.0291 0.0180 0.0133 0.0103 0.00635 0.00534 0.00379 Standard deviation 3980 1020 548 113 53.6 23.9 7.30 2.69 0.909 0.390 0.176 0.0731 0.0452 0.0265 0.0201 0.0166 0.0151 0.0140 0.0120 0.0113 0.00989 Confidence interval (95%) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D -0.00387 - 0.173 -0.00572 - 0.0983 -0.0103 - 0.0685 -0.0146 - 0.0505 N/D N/D N/D N/D -0.0156 - 0.0232 Page 716 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Hidden Valley. EA 1000 - Log -Pearson type 3 i' VRC'l 900 - Oservatioi7s ---;---------;---------- ;--------------------- ---------- -------------- 800 - Model---�---------I----------I-------------------i----------------------- Conf Int 95% 700 , {('4/j1 X41}____________�__________J--------- _________ _________ _--------i----------L----- -- --- - r 414141------------- J---------- J___------L---------L--------_ ------ 1---------- L---------- {f} 5/0}/0} 1---------I--------- ---------I----------I--------- -- X00----------------------I------------------*----------r-------- --- L 300 200---------------------------------------------------------------i---------- i----- ----- 100------------1----------i---------f---------f---------i---------T----------i---------- __________4____________ -100 _ O7 Ln 0D O O O 07 4fJ M O O Cl 0D O 4 Q O OD Non-e.xceedance probability (Normal paper .+ Cunnatie) (DHYFRAMPLUS Page 717 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Sample Empirical probability formula : F[X(k)]=(k-0.40)/(n+0.20) (Cunnane) Inactive data (in italic) are included in the empirical probability calculation. Nr. Observation Identifier Probability empirical 1 0.34 2012 0.5490 2 6.52 2013 0.9412 3 2.9 2014 0.8431 4 0.05 2015 0.0588 5 0.4 2016 0.6471 6 0.06 2017 0.2549 7 0.27 2018 0.3529 8 0.31 2019 0.4510 9 0.05 2020 0.1569 10 0.81 2021 0.7451 Code Page 718 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Description Page 719 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Basic statistic Number of observations Minimum Maximum Mean Standard deviation Median Coefficient of variation (Cv) Skewness coefficient (Cs) Kurtosis coefficient (Ck) Active data 10 0.0500 6.52 1.17 2.06 0.325 1.76 2.40 4.60 Page 720 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Test for independence (Wald-Wolfowitz) Hypotheses : HO : The observations are independent H1 : Observations are dependent (autocorrelation of order 1) Results : Statistics value p -value : Conclusion We accept HO at a significance level of 5 %. JUS = 1.75 p = 0.0807 Page 721 of 2162 BYFRA&PL[S (c) INRS-ETE, 2002 Hidden Valley EA Hidden Valley E/\ 5�5 — ---�----'�— -----'------- . . . . . . 8 — ---�----'�— ' ' �-----'�------ ---| ---- | — . . -----------| ------ 5 ------'�-----L---''-- ' ' —11-----' ------- 4.5 ------'L----'L---''L— —' L------ . . . . . ------------ . 4 ------'�---------'�— ' ' -------'�------ E' ' ' ' ' �~ I5 ------------- ----------- �----'-- --'�-----'------- � . . . . . �e 3 ------'�-----�----f— ---�-----f------ 2�6 ------'^-----^----~'— ---'~-----~'------ . . . . . . . 2 ------'�-----|----'�— ' ---------'------ . . . . . . 1.5 ------'�-----�----'�— ' I ----I----- ------- . . . . . . � ------------- ------�----'�— . '�---------'�------ 1 ' ' 0 � ------'�-----�----'-- —'�----�-----'------- C) o o C -A Lfj IDD 19) cr) 17) 6 o o o 6 6 6 o 61 Non'exoeodonoe probability (Normal paper/ Cunnano` @HrFnAmPLuS Page 722 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Comparison of characteristics between function and sample Minimum Maximum Mean Standard deviation Median Coefficient of variation (Cv) Skewness coefficient (Cs) Kurtosis coefficient (Ck) Charac. of the population 0.000311 None 2.25 235 0.306 105 N/D N/D Charac. of the sample 0.0500 6.52 1.17 2.06 0.325 1.76 2.40 4.60 Page 723 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Log -Pearson type 3 (WRC) Results of the fitting Number of observations: 10 Parameters alpha 5.934830 lambda 18.094212 In -3.507068 Quantiles N/D q = F(X) : non-exceedance probability T = U(1 -q) N/D T q 10000.0 0.9999 2000.0 0.9995 1000.0 0.9990 200.0 0.9950 100.0 0.9900 50.0 0.9800 20.0 0.9500 10.0 0.9000 5.0 0.8000 3.0 0.6667 2.0 0.5000 1.4286 0.3000 1.2500 0.2000 1.1111 0.1000 1.0526 0.0500 1.0204 0.0200 1.0101 0.0100 1.0050 0.0050 1.0010 0.0010 1.0005 0.0005 1.0001 0.0001 XT 892 290 175 50.3 28.3 15.4 6.43 3.08 1.33 0.644 0.306 0.135 0.0847 0.0463 0.0291 0.0180 0.0133 0.0103 0.00635 0.00534 0.00379 Standard deviation 3980 1020 548 113 53.6 23.9 7.30 2.69 0.909 0.390 0.176 0.0731 0.0452 0.0265 0.0201 0.0166 0.0151 0.0140 0.0120 0.0113 0.00989 Confidence interval (95%) N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D N/D -0.00387 - 0.173 -0.00572 - 0.0983 -0.0103 - 0.0685 -0.0146 - 0.0505 N/D N/D N/D N/D -0.0156 - 0.0232 Page 724 of 2162 HYFRANPL US (c) INRS-ETE, 2002 Hidden Valley EA Hidden Valley. EA 1000 - Log -Pearson type 3 i' VRC'l 900 - Oservatioi7s ---;---------;---------- ;--------------------- ---------- -------------- 800 - Model---�---------I----------I-------------------i----------------------- Conf Int 95% 700 , {('4/j1 X41}____________�__________J--------- _________ _________ _--------i----------L----- -- --- - r 414141------------- J---------- J___------L---------L--------_ ------ 1---------- L---------- {f} 5/0}/0} 1---------I--------- ---------I----------I--------- -- X00----------------------I------------------*----------r-------- --- L 300 200---------------------------------------------------------------i---------- i----- ----- 100------------1----------i---------f---------f---------i---------T----------i---------- __________4____________ -100 _ O7 Ln 0D O O O 07 4fJ M O O Cl 0D O 4 Q O OD Non-e.xceedance probability (Normal paper .+ Cunnatie) (DHYFRAMPLUS Page 725 of 2162 Page 726 of 2162 ib'K Matrix Solutions Inc. A Montrose Environmental Company Prepared for: CITY OF KITCHENER Prepared by: MATRIX SOLUTIONS INC., A MONTROSE ENVIRONMENTAL COMPANY Version 1.0 March 2024 Guelph, Ontario Unit 7B, 650 Woodlawn Rd. West Guelph, ON, Canada N1K 1B8 T 519.772.3777 F 226.314.1908 www.matrix-solutions.com Page 727 of 2162 �Ieriil.L\�:TAT:7We<d4WA4f.�ML CJrkfML J "[fP►JkJ VUZf]:U HIDDEN VALLEY FLOOD RISK REDUCTION, SOURCE WATER PROTECTION, AND STORMWATER MANAGEMENT STRATEGY KITCHENER, ONTARIO Report prepared for The City of Kitchener, March 2024 Bailey Cole, B.Sc., CAN-CISEC Environmental Planner reviewed by Shari Muscat, B.E.S., B.A. Senior Environmental Planner reviewed by Karen Hofbauer, M.A.Sc., P.Eng. Principal Water Resources Engineer DISCLAIMER Matrix Solutions Inc. certifies that this report is accurate and complete and accords with the information available during the project. Information obtained during the project or provided by third parties is believed to be accurate but is not guaranteed. Matrix Solutions Inc. has exercised reasonable skill, care, and diligence in assessing the information obtained during the preparation of this report. This report was prepared for The City of Kitchener. The report may not be relied upon by any other person or entity without the written consent of Matrix Solutions Inc. and of The City of Kitchener. Any uses of this report by a third party, or any reliance on decisions made based on it, are the responsibility of that party. Matrix Solutions Inc. is not responsible for damages or injuries incurred by any third party, as a result of decisions made or actions taken based on this report. 31809 Hidden Valley NH R 2024-03-12 Final V1.0.docx Matrix Solutions Inc. A Montrose Environml2®t;iPt(7c26pfQ162 VERSION CONTROL 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx Matrix Solutions Inc. A Montrose Environml2at*9c29pafQ162 TABLE OF CONTENTS 1 INTRODUCTION................................................................................................................................ 1 1.1 Study Area........................................................................................................................... 1 1.2 Background Review............................................................................................................. 3 1.2.1 Previous Reports.................................................................................................... 3 2 POLICY CONTEXT.............................................................................................................................. 4 2.1 Policy Framework................................................................................................................ 5 2.2 Agency Consultation........................................................................................................... 9 3 NATURAL HERITAGE EXISTING CONDITIONS................................................................................... 9 3.1 Identified Features.............................................................................................................. 9 3.1.1 Environmentally Sensitive Policy Areas............................................................... 10 3.1.2 Valleylands...........................................................................................................10 3.1.3 Wetlands..............................................................................................................10 3.1.4 Areas of Natural and Scientific Interest............................................................... 10 3.1.5 Significant Woodlands......................................................................................... 11 3.2 Aquatic Habitat and Fisheries........................................................................................... 13 3.2.1 Background.......................................................................................................... 13 3.2.2 Methods...............................................................................................................13 3.2.3 Results and Discussion......................................................................................... 13 3.3 Vegetation Communities and Plants................................................................................ 16 3.3.1 Background.......................................................................................................... 16 3.3.2 Methods...............................................................................................................16 3.3.3 Results and Discussion — Rare Plant Communities .............................................. 16 3.3.4 Result and Discussion.......................................................................................... 17 3.4 Wetland Delineation......................................................................................................... 20 3.4.1 Background.......................................................................................................... 20 3.4.2 Methods...............................................................................................................20 3.4.3 Results and Discussion......................................................................................... 20 3.5 Wildlife..............................................................................................................................21 3.5.1 Background.......................................................................................................... 21 3.5.2 Methods...............................................................................................................21 3.5.3 Results and Discussion — Matrix Incidental Wildlife Observations ...................... 22 3.5.4 Results and Discussion — SAR and SCC................................................................. 22 3.6 Significant Wildlife Habitat............................................................................................... 26 3.6.1 Background and Methods.................................................................................... 26 3.6.2 Results and Discussion......................................................................................... 26 4 IDENTIFICATION OF ALTERNATIVE SOLUTIONS............................................................................. 28 6 PREFERRED SOLUTION................................................................................................................... 32 6.1 Identified Natural Heritage Features................................................................................ 32 Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx iv A Montrose Environml2®t;ipt(7dHpafQ162 6.2 Aquatic Habitat and Fisheries........................................................................................... 32 6.3 Vegetation Communities and Plants................................................................................ 33 6.4 Wildlife..............................................................................................................................33 Area.............................................................................................................................. 6.5 Significant Wildlife Habitat............................................................................................... 34 7 PROJECT IMPLEMENTATION AND NEXT STEPS.............................................................................. 34 7.1 Permitting and Approvals................................................................................................. 34 7.2 Construction Mitigation Measures................................................................................... 35 7.3 Recommended Studies..................................................................................................... 38 8 REFERENCES...................................................................................................................................40 24 IN -TEXT FIGURES Figure 1 Study Area Overview..................................................................................................... 2 Figure 2 Natural Heritage Features........................................................................................... 12 Figure3 Aquatic Reaches........................................................................................................... 15 Figure 4 Ecological Land Classification...................................................................................... 19 IN -TEXT TABLES Table 1 Background Sources...................................................................................................... 3 Table 2 Applicable Federal, Provincial, and Municipal Policies..................................................5 Table 3 Rare Ecological Land Classification Communities Potentially Present Within the Study APPENDIX D Species of Conservation Concern (SCC) Habitat Screening Area.............................................................................................................................. 17 Table 4 Ecological Land Classification Communities within the Study Area ............................17 Table 5 Wildlife Observed by Matrix on September 27, 2023 ................................................. 22 Table 6 Species at Risk Potentially Present Within the Study Area ......................................... 23 Table 7 Species of Conservation Concern Potentially Present Within the Study Area............ 23 Table 8 Locally Rare Plant Species Observed within the Study Area by LGL ............................ 24 Table 9 Significant Wildlife Habitats Potentially Present within the Study Area ..................... 27 Table 10 Impact Assessment of Proposed Alternatives............................................................. 30 Table 11 SAR and SCC Potentially Present Within the Vicinity of Alternative 4 ........................ 33 APPENDICES APPENDIX A Site Photographs APPENDIX B Desktop Wildlife Species Results APPENDIX C Species at Risk (SAR) Habitat Screening APPENDIX D Species of Conservation Concern (SCC) Habitat Screening APPENDIX E Significant Wildlife Habitat Screening Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx v A Montrose Environml2®tiA(7Q3 pfQ162 I INTRODUCTION The City of Kitchener (the City) has retained Matrix Solutions Inc., a Montrose Environmental company to complete a review of the natural heritage features to support a Municipal Class B Environmental Assessment for Flood Risk Management within the Hidden Valley Watershed. Congruent with the Class Environmental Assessment process, Matrix has also been retained to support the City with the development of a Stormwater Management Strategy, and Source Water Protection and Intake Protection Zones. This report has been written to support the Flood Risk Reduction Environmental Assessment which is being undertaken to reduce existing flood risks and to support future development in the Hidden Valley community. Within the downstream reaches of Hidden Valley Creek, there are several flood and erosion vulnerable areas, as well as watercourse crossings which may not have capacity to pass current or proposed peak flows. This report provides a detailed description of the study area, and the extent of natural heritage features within it. Through a review of existing literature and databases, this report will help guide the selection of the long list of alternatives. This report should be read in conjunction with the Hidden Valley Flood Risk Reduction Schedule B Class Environmental Assessment (Matrix 2024). 1.1 Study Area The subject lands include the lands that drain to Hidden Valley Creek in Kitchener (Ontario). The study area includes these lands, and an additional 120 m of adjacent lands. The subject lands are bound to the north by Morgan Avenue, by the Grand River to the east, 280 m south of Hidden Valley Road, and Wilson Avenue to the west. A map of the Hidden Valley subwatershed can be seen in, showing both the subject lands, and the study area boundaries. The Hidden Valley Creek subwatershed is approximately 183 hectares in size. Current land uses within the study area include a broad range of residential, agricultural, employment, commercial, and major infrastructure uses. There is currently a stormwater management facility located in the southeast corner of the study area. Previous land uses have included an equine facility and a gravel pit which was located on the northeast corner of Hidden Valley Road and Wabanaki Drive. The Hidden Valley area is considered one of the most significant environmental features within the City of Kitchener and the Region of Waterloo. The area contains an esker formation, provincially significant wetlands, large significant woodland and upland forest areas, rare and significant flora and fauna including regulated habitat for species at risk, habitat breeding areas, sourcewater protection areas and steep slopes along the Grand River. Each of these natural features and their constraints will help guide the selection of the long list of alternatives. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 1 A Montrose Environml2at*9G32pafQ162 1.4 cE o e o yu o 3 P _ > \ O U 0 Q ko av Q 11 - age 000 086 mg 086 000 086 00� 03i 000'03- oog 086 ti U loll i r- 7 r v r FIOFSTETTERP�� � Y U `180NOOOObd 21 ♦ o O Z l ti L ''' yyyo � J,S22 ' 1 U 2lO )Nb)yygbM^� 0 ti CNANDARIA PL � r I ti 'DDRjr eb oos ab aoo oos os6 aoo oa6 ms o86 (w) 6uIWON Background Review A desktop background review of available online resources and wildlife atlases was conducted to collect information regarding natural features and wildlife within the study area. As part of this review, available aerial photography, and mapping was also compiled and reviewed. The sources used are outlined in Table 1 below. Table 1 Background Sources _r Source Land Information Ontario (LIO) Citation MNR 2000 Information Reviewed 11111111 Natural heritage features data layers Ontario GeoHub MNRF 2023a Natural heritage features data layers Aquatic Species at Risk Map DFO 2023 Aquatic species at risk map Natural Heritage Information Centre (NHIC) MNRF 2023b Data records for the study area Ontario Breeding Bird Atlas (OBBA) Birds Canada et al. 2023 Species records for the study area Ontario Butterfly Atlas TEA 2023a Species records for the study area Ontario Moth Atlas TEA 2023b Species records for the study area Ontario Reptile and Amphibian Atlas Ontario Nature 2023 Species records for the study area Important Bird Areas Bird Studies Canada 2023 Data records for the study area eBird Cornell Lab of Ornithology 2023 Species records for the study area Ontario Mammals, iNaturalist CAS 2023b Species records for the study area iNaturalist CAS 2023a Species records for the study area 1.2.1 Previous Reports Extensive natural heritage studies have been completed within the Hidden Valley area, from 1979 through to 2023. This has included landscape level studies as well as detailed species-specific surveys. The following reports were reviewed and incorporated into our assessment: 1. Hidden Valley Land Use Master Plan (City of Kitchener, 2019) 2. Class Environmental Assessment. River Road Extension from King Street Eastto Manitou Drive (IBI Group, 2013) 3. Planning and Works Committee. Agenda: Tuesday March 4t", 2014, 2pm (Regional Municipality of Waterloo, 2014) 4. Stage 2 ION LRT from Kitchener to Cambridge Transit Project Assessment Process (WSP 2021) 5. Schedule B Class Environmental Assessment. Upper Hidden Valley Sanitary Pump Station and Forcemain (MTE Consultants Inc., 2022) 6. Hidden Valley Inventory of Environmental Features and Functions (Ecologistics, 1979) 7. Hidden Valley Draft Characterization Report. Comprehensive Environmental Impact Study for the City of Kitchener (LGL, 2023. Draft) Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 FinalVl.O.docx 3 A Montrose Environml2at;iPtGa3Apuf 1162 2 POLICY CONTEXT The community of Hidden Valley is located in southwestern Ontario, along the Grand River within the City of Kitchener, in the Region of Waterloo. As it is located within a two-tier municipality, the study area is subject to official plan policies from both the City of Kitchener and the Region of Waterloo. Due to the recent passing of Bill 23, Bill 13, and Bill 109, there have been substantial changes to the planning policies within 2 tier municipalities, notably with the delegation of most planning powers to the lower tier municipalities. Although the City of Kitchener has updated their Official Plan since the passing of these bills, the Region of Waterloo Official Plan has not yet been updated, as such the current Region of Waterloo policies have been referred to. It should be noted that these policy changes are both dynamic and ongoing. At the time of writing this report, we have received notice from the Ministry of Municipal Affairs and Housing (MMAH) that additional changes and decisions regarding municipal plans can be expected in early 2024. A portion of the study area is regulated by the Grand River Conservation Authority (GRCA), and the study area is also subject to legislation from the Ontario Ministry of Environment, Conservation and Parks (MECP), and the Ontario Ministry of Natural Resources and Forestry (MNRF). The following section provides a summary of the legislation and guidelines relevant to this project. 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E o&« o a z a @ % 9 /) & \ _ s \ § _ , c - m / \ \ 2\ a u i\ g t& 2 r -u \$I%3 « § 3 J; 2 5/ t y& \�z gaff/j/f \\\�\\//� \ƒ% 2 2 / ` / \ u § u = / % ( u���m /\ K E§$ » I d E f f\\ N S 4- 0 m q rl- ¢ 2 n � / / 0 / 0 / \ e � \ _ \ \ \ � � % 2 © 5 » 2 2 / � -Ln \ / / \ 5 \ = s v § / / § & 2k// -0 d\ J% 7/ 6 7/ ( CL/ \ # Z ƒ } \� & / � 0 2 _ < u / § ) § t f 2 e ) \ V) >_0 z� ƒ E \ { :®! E o&« o a z a @ % 9 /) & \ _ s \ § _ , c - m / \ \ 2\ a u i\ g t& 2 r -u \$I%3 « § 3 J; 2 5/ t y& \�z gaff/j/f \\\�\\//� \ƒ% 2 2 / ` / \ u § u = / % ( u���m /\ K E§$ » I d E f f\\ N S 4- 0 m q rl- ¢ 2 n � / / 0 / 0 / \ e � 2.2 Agency Consultation A request for information regarding the study area was submitted to the MECP and the MNRF (Aylmer District office) on May 9th, 2023. Wetland evaluation records and records of SAR and their critical habitat was requested. The MNRF provided wetland evaluation records on May 10th, 2023, and the MECP provided SAR critical habitat mapping on May 23, 2023. All information provided will be incorporated into the appropriate sections within this report. As these correspondences include confidential information, a copy of them will not be provided in this report. 3 NATURAL HERITAGE EXISTING CONDITIONS Natural heritage information available for the site has been compiled as part of the background review. Species records, natural features, and habitat types were reviewed, and their results can be found in the following subsections. These findings will be used to evaluate and assess the short list of alternatives through the EA process. Once the preferred alternative has been identified, these findings will help inform the necessary mitigation measures and, if required, any additional studies. 3.1 Identified Features The City of Kitchener Official Plan and the Region of Waterloo Official Plan were reviewed to identify any natural heritage features or Core Natural Areas that may be present. Within the City of Kitchener, Core Natural Areas are designated as "Natural Heritage Conservation" and includes Provincially Significant Wetlands, Locally Significant Wetlands, significant valleys, environmentally significant valley features, locally significant valley features, environmentally sensitive policy areas, significant woodlands, locally significant woodlands, significant habitat of endangered or threatened species, and fish habitat. The Region of Waterloo Greenlands Network is divided into Core Environmental Features and Landscape Level Systems. Landscape level systems include significant valleylands, environmentally sensitive landscapes, the provincial greenbelt natural heritage system, regional recharge areas, and the southwest Kitchener policy area. Core environmental features include PSWs, environmentally sensitive policy areas, regional forests, forests greater than 4 ha, and significant valley features. The study area contains Kitchener Core Natural Heritage Features and Regional Core Environmental Features. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 9 A Montrose Environm12®tiPt(7AflpfQ162 3.1.1 Environmentally Sensitive Policy Areas Environmentally Sensitive Policy Areas (ESPA's) are core natural heritage features that have been designated through the Region of Waterloo Official Plan. Two ESPA's are located within the study area: • ESPA 27: Hidden Valley. Located within the central portion of the study area. • ESPA 28: Petrifying Spring. Located to the southwest of the study area. 3.1.2 Valleylands Valleylands are natural areas that occur in a valley or landform depression that has flowing or standing water for some period of the year. The Grand River flows from Wareham, Ontario, south through Brantford and Paris, before emptying into the north shore of Lake Erie, just south of Dunnville. A reach of the Grand River and its associated valleyland flows through the eastern portion of the study area. It is confined due to steep banks and slope erosion hazards and has been identified as a Regionally Significant Valley. Hidden Valley Creek and Hoffstetter Creek and their associated valleylands which traverse the study area, have been identified as a Locally Significant Valleylands. To the immediate north of the study area, the upstream section of Hidden Valley East Creek (north of Highway 8) is listed as future restored locally significant valleyland. 3.1.3 Wetlands The study area contains the Hidden Valley Provincially Significant Wetland (PSW). This PSW is located within the central portion of the property and is approximately 19 ha in size. It contains both swamp and marsh habitat types. Both the Lower Freeport Creek Non-PSW Complex and the Grandview PSW are located just outside of the study area, on the eastern side of the Grand River, adjacent to Highway 8. 3.1.4 Areas of Natural and Scientific Interest Areas of Natural and Scientific Interest (ANSIs) are areas of land or water that contain features identified as having life science or earth science values related to protection, scientific study, or education. Based on the background review completed by Matrix, there are no ANSIs present within the study area. The Freeport Esker (an Earth Science ANSI) is located approximately 1.2km to the east of the project area. Additionally, the Homer Watson Park (an Earth Science ANSI) is located approximately 1.0km to the southwest of the project area. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 10 A Montrose Environm12atJA(7A4pfQ162 3.1.5 Significant Woodlands Woodlands are treed areas that provide environmental and economic benefits to the landowner as well as the general public. These woodlands provide benefits such as wildlife habitat, erosion prevention, hydrological and nutrient cycling, long-term storage of carbon, as well as recreational and harvesting opportunities. Woodlands vary in their level of significance at the local, regional, and the provincial levels. Significant Woodlands within the City of Kitchener are those that are greater than 4 hectares, consist primarily of native tree species, and meet the criteria of a woodland under the Regional Woodland Conservation By-law. Locally Significant Woodlands are less than 4 ha in size, but are ecologically, functionally, or economically important. Regionally Significant, Locally Significant, and other woodlands have been identified by the City of Kitchener Natural System Technical Background Report (2014) within the study area. A large portion of the central woodland has been identified as Regionally Significant. A small eastern portion of this woodland has been identified as Locally Significant, and small northwest portion of this woodland has been identified as other woodlands. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 11 A Montrose Environm12atjA(7A2pf 1162 cE r v e� 1.4 O yuFar LL O L N oz ko av _ m- N N - z�34 w oar aos w wo oar oos oer o00 oar aos oar 011 a o z g a z O U A � O N � O W Y6 a o� n � � Y U.. __ 121O>1O0OObd � O 2 ♦ o Np �� / •.Rte., ..,-- � O [�Q `vo N Avm / ` O w ` o- � o 6 o 14�J4O ' }. I Y CNPNDPRIP PL ♦ I r _t "53�,d NOSIIM ly- IW VAQ d � , M ,•% /lyH�B Uc % � U MANITOU DR 0006o B6 ws Dar 00o OOS oar 00OLa ooS Oar (w) bul"ON 3.2 Aquatic Habitat and Fisheries 3.2.1 Background Aquatic Habitat Assessments are used to identify impacts and to propose mitigation measures, with the goal of preventing or reducing impacts to fish and fish habitat. Under the Fisheries Act, fish habitat means the water frequented by fish and any other areas on which fish depend directly or indirectly to carry out their life processes, including spawning grounds and nursery, rearing, food supply and migration areas (DFO). 3.2.2 Methods A high-level aquatic habitat assessment was conducted by Matrix on September 27, 2023, to characterize aquatic features within the study area. LGL had previously sampled the area in 2009, 2012, and 2015. Matrix assessed the portion of Hidden Valley Creek approximately 40m downstream of the culvert crossing and approximately 55m upstream of the culvert. Detailed field notes and photos were recorded. The following information was documented during this assessment: • Substrate type and composition; • Riparian and aquatic vegetation; • Potential fish habitat or presence of fish; • Flow conditions; • Adjacent lands (vegetation community type, riparian habitat, canopy cover, land use, etc.); • Channel morphology; and • Instream habitat and cover. As the area has already been extensively studied, no fish community assessment or detailed aquatic assessment were completed by Matrix as part of this Environmental Assessment. 3.2.3 Results and Discussion The study area contains three watercourses, the Grand River, Hofstetter Creek, and Hidden Valley Creek (North, East, and West). Site conditions, as observed by Matrix during our field visit, were cross referenced with those outlined by LGL from their previous studies. No significant differences were observed. Characteristic photos of the site, including the areas assessed for aquatic habitat are found in Appendix A. Grand River The Grand River and its tributaries are considered warmwater fish habitat. Extensive fish records are available within the Grand River, but there is no documented evidence of fish within Hidden Valley Creek. Within the Grand River, critical habitat for Black Redhorse and Silver Shiner has been identified by Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 13 A Montrose Environm12at*9AApafQ162 the DFO. Any work within proximity to either watercourse would require a request for review from the DFO. The Hidden Valley East Creek empties into the Grand River approximately 140 m downstream of the Hidden Valley Road culvert. At the mouth of Hidden Valley East Creek, there is clear deposition of fine sediments into the Grand River, likely as a result of ongoing erosion in the Hidden Valley Creek system. Although no fish were observed in the area surrounding the culvert, the area immediately downstream of the culvert is functionally connected to the Grand River and may support fish and fish habitat. Hidden Valley East Creek — Culvert Under Hidden Valley Road The Hidden Valley Road culvert infrastructure includes two culverts on the west side that join into one culvert on the east side. This culvert crossing is a complete barrier to fish passage, even during spring run- off conditions. The lower (main) culvert is entirely filled with packed sediment and is completely buried on the west end. The upper (overflow) culvert is perched, by approximately 1.5 to 2 m in height on the upstream side. Water appears to be flowing underground, across Hidden Valley Road, bypassing both culverts entirely. A high-level aquatic habitat assessment showed that the area within the vicinity of the Hidden Valley Road Culvert was overall poor fish habitat, and no fish were observed. Although a detailed benthic assessment was not completed, a visual survey of the water showed the substantial presence of scuds, which is an indicator of poor water quality. The dominant substrate type was rubble, with some gravel and sand. Instream cover for fish included undercut banks and boulders scattered throughout. Although the upper reaches of Hidden Valley Creek were experiencing significant instability concerns, the lower portion of the creek, where the culvert is located was generally stable. Adjacent land uses were residential with manicured grasses. Heavy disturbance was present upstream, as adjacent landowners have removed bank vegetation and replaced it with manicured rocks. Seeps are natural areas where there is shallow groundwater movement, which eventually rises to the surface through a porous substrate and contributes to the surface water features. Seeps have an important contribution to the overall hydrological function of headwaters, recharge areas, and discharge areas within natural heritage systems. A seep was present immediately upstream of the Hidden Valley Road culvert. The seep appears to be originating from the southwest, near the wastewater management facility. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 14 A Montrose Environm12atJA(7AbpfQ162 cE o e 1.4 O o 30 �= N �w Y' = m oZ U u - 'L o >. f6 E v " y o U m a R o !� > Q $ _ $e 000 oar ws oar W0 oar oos oer o00 oar aos oar c p J G�9� m N 1� 1 yZ "t Aa ,g PuvA� O C �.i. a O t to w e Ee` '4�,.�1101 N0)I000Ob w d O t � ` o ` I 'e ♦ � � red c� t 'wg ` ,IVM NIVj 0 42 I ♦ I r ` 3AH NOS -)IM I W \ I y 40� w �bH, e . cS 1:S °bN��bHOoo � g� o�� d�0�6 v � � � , G eek -•, MPJJIT()UOyRj� eb oos ab aoo oos oar aoo oar ms oar (w) BU14PON 3.3 Vegetation Communities and Plants 3.3.1 Background Ecological Land Classification (ELC) of southern Ontario was established in 1994 to manage natural resources and the information about those resources. ELC provides a uniform and consistent way to identify, describe, name, map, manage, and conserve important landscape patterns and communities. Within southern Ontario and the Region of Waterloo, there are a number of rare or significant ELC communities. Rare vegetation communities with the potential to occur within the project area can be found in Section 3.3.3. 3.3.2 Methods Matrix staff conducted a brief reconnaissance site visit on September 27, 2023. Where Matrix had permission to access lands, a rapid vegetation assessment and a preliminary plant list was completed. Matrix walked the northern, central, and eastern portions of the study area, focussing on those areas that have been proposed to be impacted by the flood risk reduction EA and the stormwater management strategy. A rapid ELC assessment was completed, and vegetation communities were delineated using the ELC system for southern Ontario (Lee et al. 1998). Data recorded for each vegetation community included species composition and the presence of dominant and uncommon species or features. No detailed inventories were completed by Matrix, as a comprehensive set of inventories was recently completed on the property. Site conditions were cross referenced with those outlined in previous reports. No significant differences were observed. 3.3.3 Results and Discussion — Rare Plant Communities Based on the background review completed by Matrix, there is the potential for the presence of 4 rare vegetation communities within the Region of Waterloo, a list of these communities and whether they have been identified within the study area are summarized in Table 3 below. LGL identified a small TPO1-1 community within the southwestern portion of the study area during their surveys in 2021. Given the extent of development within the area, they concluded that this community was likely anthropogenic in origin and was likely established because of an applied seed mix during construction. Matrix did not enter this portion of the property, nor did we observe any other rare plant communities during our site visit. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 16 A Montrose Environm12at,ipt8A-iipfQ162 Table 3 Rare Ecological Land Classification Communities Potentially Present Within the Study Area BOS2-1 Leatherleaf Shrub Kettle Peatland Type X No No SWT3-13 Poison Sumac Organic Thicket Swamp Type X No No TPO1-1 Dry Tallgrass Prairie Type 3 No Yes TPW1-1 Dry Black Oak— White Oak Tallgrass Woodland Type 3 No No Notes: X denotes that the community is known to occur ELC - Ecological Land Classification NHIC - Natural Heritage Information Centre 3.3.4 Result and Discussion A total of 54 vegetation communities were identified within the study area by Matrix, LGL, and others. Fifty-three of these community types are both common and secure within Ontario. One rare vegetation community was observed by LGL within the study area and has been described in Section 3.3.3 above. As LGL has extensively studied the area, Matrix field surveys focused on verification on ELC community types and verification of community boundaries. Matrix observed no notable differences. Table 4 Ecological Land Classification Communities within the Study Area Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 17 A Montrose Environml2at;iPt(7c-8pfQ162 .. ELC Community Type AG CUM1-1 CUP Agriculture Dry -Moist Old Field Meadow Type Plantation CUP1 Deciduous Plantations CUP1-3 Black Walnut Deciduous Plantation Type CUP2 Mixed Plantations CUP3 Coniferous Plantations CUP3-1 Red Pine Coniferous Plantation Type CUP3-2 White Pine Coniferous Plantation Type CUP3-3 Scotch Pine Coniferous Plantation Type CUT1 Mineral Cultural Thicket Ecosite CUT1-1 Sumac Cultural Thicket Type CUW1 Mineral Cultural Woodland Ecosite FOC2 Dry -Fresh Cedar Coniferous Forest Ecosite FOC2-2 Dry -Fresh White Cedar Coniferous Forest Type FOC3 Fresh -Moist Hemlock Coniferous Forest Ecosite FOC3-1 Fresh -Moist Hemlock Coniferous Forest Type FOC4-1 Fresh -Moist White Cedar Coniferous Forest Type FOC4-2 Fresh -Moist White Cedar -Hemlock Coniferous Forest Type Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 17 A Montrose Environml2at;iPt(7c-8pfQ162 ELC Code FOD Deciduous Forest FOD3 Dry -Fresh Poplar -White Birch Deciduous Forest Ecosite FOD3-1 Dry -Fresh Poplar Deciduous Forest Type FOD4 Dry -Fresh Deciduous Forest Ecosite FOD4-2 Dry -Fresh White Ash Deciduous Forest Type FODS Dry -Fresh Sugar Maple Deciduous Forest Ecosite FOD5-1 Dry -Fresh Sugar Maple Deciduous Forest Type FOD5-2 Dry -Fresh Sugar Maple -Beech Deciduous Forest Type FOD5-3 Dry -Fresh Sugar Maple -Oak Deciduous Forest Type FOD5-6 Dry -Fresh Sugar Maple -Basswood Deciduous Forest Type FOD5-7 Dry -Fresh Sugar Maple -Black Cherry Deciduous Forest Type FOD5-8 Dry -Fresh Sugar Maple -White Ash Deciduous Forest Type FOD7 Fresh -Moist Lowland Deciduous Forest Ecosite FOD8-1 Fresh -Moist Poplar Deciduous Forest Type FOM Mixed Forest FOM6-1 Fresh -Moist Sugar Maple -Hemlock Mixed Forest Type FOM7-1 Fresh -Moist White Cedar -Sugar Maple Mixed Forest Type H Hedgerow M Manicured MAM2 Mineral Meadow Marsh Ecosite MAM2-2 Reed -canary Grass Mineral Meadow Marsh Type MAM2-5 Narrow -leaved Sedge Mineral Meadow Marsh Type MAM2-10 Forb Mineral Meadow Marsh Type MAS2-1 Cattail Mineral Shallow Marsh Type MAS3-1 Cattail Organic Shallow Marsh Type OAO Open Aquatic SWC3-2 White Cedar -Conifer Organic Coniferous Swamp Type SWD2-2 Green Ash Mineral Deciduous Swamp Type SWD4 Mineral Deciduous Swamp Ecosite SWD4-1 Willow Mineral Deciduous Swamp Type SWD5-1 Black Ash Organic Deciduous Swamp Type SWM1-1 White Cedar -Hardwood Mineral Mixed Swamp Type SWM6-1 Birch -Conifer Organic Mixed Swamp Type SWT2-5 Red -osier Mineral Thicket Swamp Type TPOV) Dry Tallgrass Prairie Ecosite Notes: ELC - Ecological Land Classification 1. Rare plant community 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx Matrix Solutions Inc. 18 A Montrose Environmf2at,iPt8A-9puf 1162 C O o . _ _ ___- W _ - - om W (D �� J U _ �� T -0C.i_=oa - __ __-;,�����o- o�. J- ' Lu _-- -__ - - - --_ oaom��������ooLLLLLLLL000000000000LLLL�LLLL=��� ¢ NEI o w d o 3.4 Wetland Delineation 3.4.1 Background The Ontario Wetland Evaluation System (OWES) was established in 1983 to aid in the identification of wetlands that have value at a provincial scale. The OWES for Southern Ontario manual is now on its 4th update (MNRF, 2022). OWES provides a uniform and consistent way to identify and measure the recognized values of wetlands, and the role that they play in maintaining critical ecosystem functions, providing social benefits, moderating storm flows, improving water quality, and protecting rare species. It was developed primarily to fill a need within Ontario's planning process: to determine whether a wetland has been identified as Provincially Significant Wetland (PSW). 3.4.2 Methods As a wetland evaluation has already been completed for the Hidden Valley PSW (MNRF, 2012), Matrix did not repeat field efforts. Instead, these wetland boundaries were verified in the field, information was collected, and any areas where the wetland boundary may have changed were identified. As part of our desktop review, satellite imagery was reviewed and analyzed. Any areas of potential differences were noted, and these areas were flagged for ground truthing. While onsite, Matrix staff completed vegetation inventories to aid in the completion of wetland boundary delineations. Wetland boundaries were drawn where 50% of the plant species observed consisted of upland species and 50% consisted of wetland species. Along with the vegetation inventory, site elevation changes and soil characteristics were assessed to aid in the delineation. 3.4.3 Results and Discussion The study area contains the Hidden Valley Provincially Significant Wetland (PSW). This wetland was evaluated in 1993, and most recently updated in 2012 (according to the wetland evaluation record). This PSW is located within the central portion of the study area and is approximately 19 ha in size. It contains a variety of habitats, including swamp and marsh habitat types. Dominant soil types are clay/loam and sand. It consists of mostly palustrine wetlands, with some isolated wetlands. These wetlands eventually drain southeast to the Hidden Valley Creek. Adjacent land uses include agricultural, residential, and a stormwater storage facility. Dominant vegetation forms within the Hidden Valley PSW include robust emergent, coniferous trees, ground cover or herbaceous, deciduous trees, free-floating plants, tall shrubs. Each wetland community present and their ELC code can be seen in Figure 4. Matrix identified a single wetland community, a MAS2-1 in the northwestern portion of the subject lands, that was larger than identified in the LGL report. Based on the vegetation present during our site visit, and using the 50% vegetation rule, this community extends further west than identified in Figure 4 by LGL and Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 20 A Montrose Environm12at,ipt(7cHpfQ162 extends into a portion of the community that had been identified as a CUM1-1. Prior to any works within close proximity to the wetland, Matrix recommends that a wetland delineation be completed, to update the evaluation records from 2012. 3.5 Wildlife Based on the background review completed by Matrix, records for a total of 151 insect, 46 mammal, 173 bird, 71 fish, 6 mussel, and 23 reptile and amphibian species were noted to occur within the overall study area. Most of these species are common and secure within Ontario, though 26 SAR and 12 SCC have been identified as well. A full list of species at risk can be found in Appendices B. 3.5.1 Background Extensive field surveys have been completed by environmental consultants, including LGL, within the Hidden Valley area. These surveys date from 1979 through to 2023 and include detailed vegetation community assessments, wildlife habitat assessments, breeding bird surveys, breeding amphibian surveys, fish community assessments, and fish habitat assessments. Through these detailed surveys, several species at risk, species of conservation concern and significant wildlife habitat have been identified. The following sections will outline these findings. Species at risk (SAR) are floral or faunal species where populations have declined (or are at risk of declining) to such an extent that the species is at risk of extinction or extirpation. Throughout this study, SAR collectively refers to species listed as threatened or endangered under the Endangered Species Act (ESA). Species of conservation concern (SCC) are floral or faunal species where decline is apparent, but not to the extent where a listing of threatened or endangered under the ESA or Species at Risk Act (SARA) are warranted. Throughout this study, SCC collectively refers to species that are listed as special concern under the ESA; species listed as special concern, threatened, or endangered under SARA where the corresponding species status under the ESA is less protective; and species with a subnational conservation rank between S1 and S3. Where critical habitat has been defined for species listed under SARA, SCC may be afforded additional protection within provincial jurisdiction. 3.5.2 Methods A desktop background review of available online resources and previous reports for the study area was completed. Data was collected from a variety of resources, as outlined in Section 1.2 Background Review. This included online public databases like Naturalist with verifiable records, as well as previous reports for the area. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 21 A Montrose EnvironnnRat,U8c Q162 3.5.3 Results and Discussion — Matrix Incidental Wildlife Observations While completing vegetation and ELC assessments, Matrix field staff recorded any incidental wildlife encountered. Four species of wildlife were observed during their site visit on September 27, 2023. These species are summarized in Table 5. Table 5 Wildlife Observed by Matrix on September 27, 2023 Common Name Latin Name — — — — — — FESA Status .•. Avian Red-tailed Hawk Buteo iomaicensis - - Eastern Gartersnake White-tailed Deer Coyote Notes: ESA — Endangered Species Act SARA — Species at Risk Act Thamnophis sirtalis sirtalis Odocoileus virginianus Canis latrans 3.5.4 Results and Discussion — SAR and SCC Twenty -Six (26) SAR listed under the ESA as either threatened or endangered and 12 SCC listed as special concern have been identified as potentially present within the study area through Matrix's background review. A full list of SAR and SCC can be found in Appendix C and Appendix D. Species without suitable habitat within the study area, or those who the site falls outside of their native breeding range, were immediately ruled out. The remaining species can be found in Table 6 and Table 7. A probability ranking of the species occurring within the study area has been assigned to each species including: • Low Probability: A site lacking either sufficient size, geographic location, or required characteristics to be considered suitable habitat using aerial interpretation and field visits. • Moderate Probability: A site containing candidate habitat features using aerial interpretation although evidence of the SAR itself was not found on site during a field visit. • High Probability: A site containing both candidate habitat using aerial interpretation as well as evidence of the SAR identified during a field visit or known to occur on the site through background information. Any species that was observed by LGL during their studies is listed as high probability. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 22 A Montrose Environm12atpt(7cHpfQ162 Table 6 Species at Risk Potentially Present Within the Study Area Common Name Black Redhorse Latin Name Aquatic Moxostoma duquesnei ESA Status THR SARA Status THR Probability High Silver Shiner Notropis photogenis THR THR Moderate Wavy -rayed Lampmussel Bank Swallow Lampsilis fasciola Avian Riparia riparia THR THR SC THR Moderate High Bobolink Dolichonyxoryzivorus THR THR Low Chimney Swift Chaetura pelagica THR THR High Eastern Meadowlark Black Ash Sturnella magna Flora Fraxinus nigra THR END THR No Status Low High Butternut luglans cinerea Herpet. . END END High Restricted species Restricted species Mammals END END High Eastern Small -footed Myotis Myotis leibii END N/A High Little Brown Myotis Myotis lucifugus END END High Northern Myotis Myotis septentrionalis END END High Tri -colored Bat Perimyotissubflavus END END High Notes: END — endangered; ESA — Endangered Species Act SARA — Species at Risk Act; SC — special concern THR—threatened Table 7 Species of Conservation Concern Potentially Present Within the Study Area Notes: END —endangered; ESA —Endangered Species Act SARA— Species at Risk Act; SC — special concern THR — threatened 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx Matrix Solutions Inc. 23 A Montrose Environmf2at,iPt8dApufQ162 Aquatic The Department of Fisheries and Oceans Canada (DFO) has identified critical habitat for two species at risk within the Grand River. This includes Black Redhorse (Moxostoma duquesnei) and Silver Shiner (Notropis photogenis), both listed as Threatened under the ESA and SARA. The Wavy -rayed Lampmussel (Lampsilis Fasciola) (THR, SC) and Rainbow Mussel (Vilosa iris) (SC, SC) have also been identified within the Grand River. Although these SAR are present within the Grand River, given the barriers at Hidden Valley Road, and the lack of suitable aquatic habitat, there is no evidence that Hidden Valley Creek currently supports these species. Avian Of the bird species noted through the background review, most are dependent on large grasslands or woodlands with mature trees and swamps. Through breeding bird surveys on the property, and several verifiable naturalist observations, most of these species are confirmed to be present within the overall Hidden Valley Community. Along Hidden Valley West Creek, there was significant bank erosion observed by Matrix, which could be suitable habitat for Bank Swallows, as they prefer to nest within vertical banks with loose soils lacking vegetation. Flora LGL (2023) identified two SAR trees, and a number of locally significant plant species within the study area. Both butternut (Juglans cinerea) and black ash (Fraxinus nigra) are listed as Endangered under the ESA and are afforded additional protections. Both species occur within wetlands or moist forest habitats and can be found within these respective areas within the study area. These features are generally located outside of the proposed development limit. LGL observed an additional 18 species of locally rare plants within the study area. These results can be found in Table 8 below. Thirteen (13) of these species have been identified as locally rare on the current Region of Waterloo Plant List (2006), and an additional 5 have been identified under the proposed Region of Waterloo Plant List (2020) that is currently in draft form. Table 8 Locally Rare Plant Species Observed within the Study Area by LGL black walnut Juglans nigra X X X X bristle -stalked sedge Carex leptalea ssp. Leptalea X X X burred sedge Carex sparganioides X X X common hackberry Celtis occidentalis X X X X common juniper Juniperus communis X X X fringed gentian Centianopsis crinite X X X james' sedge Carex jamesii X X X Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 24 A Montrose Environml2at,�8cH pfQ 162 Species LocalStatus Observations by LGL Name Latin Name Waterloo, Waterloo, 2006Common 2020* Prior to 2021 2021 purple joe-pye-weed Eupatorium purpureum var. purpureum X X X X X X sand dropseed Sporobolus cryptandrus stoneroot Collinsonia canadensis X X X X white spruce Picea glauca X X X X white wild licorice Galium circaezans X X X wood's sedge Carex woodii X X X Cottonwood(') Populus deltoides XM X X European beggar- ticks(') Bidens vulgate XM X tall beggar -ticks(') Bidens vulgate XM X thin -leaved sedge(') Carex cephaloidea XM X X wooly sedge(') Carex pellita XM X Notes: * The Region of Waterloo's Locally Rare Plant List for 2020 is currently in draft form. 1. Species that have only been identified as locally rare within the draft 2020 document Herpetofauna LGL observed Snapping Turtles (Chelydra serpentina) nesting in the area adjacent to the Hidden Valley Provincial Significant Wetland, in the summer of 2013. Snapping turtles are listed as special concern under the ESA but may be given additional protections as their nesting areas may be considered Significant Wildlife Habitat (SWH). Restricted Species A restricted species has been confirmed within Hidden Valley, and within the study area, through studies that were completed by LGL in 2008. As a result of these studies, Regulated Habitat has been mapped within the study area, with the most recent update being in 2018 by the MNRF. Due to recent changes in provincial government, Regulated Habitat for species at risk is now under the jurisdiction of the MECP, and no longer the MNRF. Additional surveys have been completed by landowner and their consultants; however, these results are not yet available. Invertebrates Monarchs (Danaus plexippus) (Special Concern) was identified within the study area by LGL in 2021 and WSP in 2020. Monarchs generally occur within tallgrass or meadow habitats and prefer areas dominated by milkweed. Some small milkweed patches and sparse areas of suitable habitat were observed within the study area by Matrix. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 25 A Montrose Environml2at,JA8c56pfQ162 Mammals Four species at risk bats have been identified as potentially occurring within the study area. This includes the Eastern Small -footed Myotis (Myotis leibii), Little Brown Myotis (Myotis lucifugus), Northern Myotis (Myotis septentrionalis) and Tri -coloured Bat (Perimyotis subflavus), which are all listed as Endangered under the ESA. Generally, there are few records of bat roosting habitat in Ontario; however, it is known that they were widespread and abundant prior to the outbreak of white -nose syndrome. Bat acoustic monitoring was completed within portions of the study area in 2018 (WSP 2020). Although they were unable to determine the exact species of bats that were present, they identified that these individuals were presumed to be a Myotis or Perimyotis species. Although there are no general habitat descriptions, the recovery strategies for each species provides guidance on sensitivity of habitats for SAR bat use. These species can form roosts in woodlands with abundant trees that support cavities, cracks, and loose bark. Little Brown Myotis particularly relies on man-made structures that provide a range of microclimates, such as attics, barns and sheds, while Northern Myotis is primarily reliant on treed habitats for roosting. Three additional species of bats including the Red Bat (Lasiurus borealis), the Hoary Bat (Lasiurus cinereus), and the Silver -haired Bat (Lasionycteris noctivagans) have recently been listed by COSEWIC as Endangered. Although they are not currently listed under the ESA, it should be noted that regulations and protections are subject to change over time. 3.6 Significant Wildlife Habitat 3.6.1 Background and Methods Significant natural heritage features include those listed in the Provincial Policy Statement, 2020 (PPS; MMAH 2020), the Natural Heritage Reference Manual (NHRM; MNR 2010), the Significant Wildlife Habitat Technical Guide (SWHTG; MNR 2000), the Significant Wildlife Habitat Criteria Schedules for Ecoregion 6E (the Ecoregion 6E Schedules; MNRF 2015), the City of Kitchener Official Plan (2023), and the Region of Waterloo Official Plan (2015). The findings of the background review and of our brief site investigation were cross referenced with the criteria provided in these documents to identify the potential presence of significant natural heritage features and functions. 3.6.2 Results and Discussion The study area has the potential to contain candidate or confirmed SWH habitat types, including habitat for SAR or SCC. The Ecoregion 6E Schedules describe five categories of SWH for Ecoregion 6E: • Seasonal Concentration Areas of Animals: areas where wildlife species occur annually in aggregations at certain times. • Rare Vegetation Communities: contain rare plant species communities. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 26 A Montrose EnvironnnRat,U8c i pfQ162 • Specialized Habitats for Wildlife Considered SWH: contain rare habitats that wildlife populations depend on, especially for breeding and nesting. • Habitats of SCC Considered SWH: includes SCC species, species that are locally or regionally rare and are declining, or other species with conservation concerns. • Animal Movement Corridors: corridors that allow the movement of wildlife from one habitat type to another. Using data from the background review and field visit, the SWH criteria were evaluated and 18 SWH types have potential to be present within the study area, these are summarized in Table 9. Field investigations, completed by Matrix, LGL, and others, have confirmed a number of these SWH types within the area. The full screening can be found in Appendix E. Table 9 Significant Wildlife Habitats Potentially Present within the Study Area Significant Wildlife Habitat Associated Habitat Type Seasonal Concentration Areas of Animals Raptor Wintering Area Candidate: SWH type is present within the project area. Suitable forest and upland habitats are present and within proximity to the Grand River. Bat Maternity Colonies Confirmed: SWH type is present within the study area. Confirmed habitat for SAR bats identified by WSP (2020) within the northwest portion of the study area. Suitable forested areas with large diameter trees are present. Turtle Wintering Areas I Confirmed: SWH type is present within the study area. Confirmed basking observations of a Snapping Turtle during an emergent period (LGL, 2023). Suitable swamp and open water habitat are present. Reptile Hibernaculum Candidate: SWH type may be present within the study area. Colonially -Nesting Bird Candidate: SWH type is present within the study area. Portions of Hidden Valley Breeding Habitat (Bank and creek are experiencing significant bank erosion. The upper reaches of Hidden Cliff) Valley West Creek contain steep and eroded slopes adjacent to meadow communities. Deer Yarding Areas Confirmed: A deer yarding and congregation area has been identified by the Kitchener Natural Heritage System Technical Background Report (City of Kitchener, 2014). Deer Winter Congregation Confirmed: A deer yarding and congregation area has been identified by the Areas Kitchener Natural Heritage System Technical Background Report (City of Kitchener, 2014). Tallgrass Prairie Confirmed: SWH type is present within the study area but not within the project area. Tallgrass prairie community is located in the southwest portion of the study area, as seen in Figure 4. LGL noted that this area was planted as part of construction restoration. Waterfowl Nesting Area i Candidate: SWH type present within the study area. Area contains suitable upland habitats adjacent to wetlands. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 27 A Montrose Environml2at;iPt(7cfi6paf 1162 Significant Wildlife Habitat , Associated Habitat Bald Eagle and Osprey Candidate: SWH type present within the study area. Suitable nesting habitat is Nesting, Foraging and located adjacent to the Grand River. Perching Habitat Turtle Nesting Areas Confirmed: SWH present within the study area. Suitable shallow marsh habitat with exposed soils. LGL (2023) confirmed turtle nesting within the agricultural field within the northern portion of the study area. Seeps and Springs Confirmed: SWH present within the project area. A seep was identified near the culvert structure at 735 Hidden Valley Road. Amphibian Breeding Habitat Confirmed: SWH present within the project area. Suitable wetland habitat (Woodland) within close proximity to a woodland habitat. LGL (2023) Confirmed breeding of Habitats of Species of Conservation amphibians. Concern Considered Significant Wildlife Habitat Marsh Breeding Bird Habitat Candidate: SWH type is present within the project area. Suitable meadow marsh ecotype is present. Shrub/Early Successional Candidate: SWH type is present within the study area but not within the project Bird Breeding Habitat area. There is a field to the southeast of the project site that is >10ha of cultural thicket that is actively naturalizing. Special Concern and Rare Candidate: SWH type is present within the project area. Several SCC have been Wildlife Species CorridorsAnimal Movement confirmed within the project area. Amphibian Movement Confirmed: SWH type is present within the study area. Suitable wetland habitat Corridors within close proximity to a woodland habitat. Confirmed by LGL (2023). Deer Movement Corridors Confirmed: SWH type is present within the study area. LGL (2023) has identified a movement corridor along the Grand River, and along Wabanaki Road. The potential for 3 additional SWH communities to occur within the project area have been identified by Matrix that were not previously identified by LGL. This includes Colonially -Nesting Bird Breeding Habitat (Bank and Cliff), Reptile Hibernaculum, and Seeps and Springs. 4 IDENTIFICATION OF ALTERNATIVE SOLUTIONS A series of alternatives have been developed to reduce the flood risk and to support future development in the Hidden Valley community. The following sections are meant to provide an overview of the environmental impacts of each alternative, meanwhile the complementing Flood Risk Reduction EA (Matrix 2024) will provide a more detailed description of these alternatives. Alternative 1: Do Nothing Alternative 1 proposes a do-nothing scenario in which no changes are made. Flood risk downstream of the wetland would remain as is. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 28 A Montrose Environm12atpt(7cfi9pfQ162 Alternative 2: Reduce Flows Upstream of the Wetland Alternative 2 proposes that flow be attenuated upstream of the Hidden Valley ESPA/PSW using oversized stormwater controls. Alternative 3: Flow Control Structure in the Wetland Alternative 3 proposes the construction of a flow control structure, such as a dam, within the Hidden Valley ESPA/PSW to provide engineered attenuation within the wetland. This alternative would mimic the flood protections that were previously provided by beavers in the area. Alternative 4: Conveyance Improvements Downstream of the Wetland Alternative 4 proposes to increase the conveyance downstream of the Hidden Valley ESPA/PSW through modifications in the Hidden Valley Road culvert infrastructure. 5 EVALUATION OF PROPOSED ALTERNATIVES The following section identifies, describes, and discusses the existing and potential impacts to the natural environment that may occur due to each of the proposed alternatives. • Existing Impacts are the existing stressors or other factors contributing to the site's current state. • Short Term (indirect) impacts are generally those associated with the construction stage of the project and are typically temporary and preventable through the application of proper construction practices & mitigation and site inspection. • Long Term (direct) impacts are those related to actual development plan and post -construction activities; however, these can also be mitigated or minimized through careful planning, construction design and the implementation of environmental best management practices Based on Matrix site investigations, the following impacts are relevant to the flood mitigation strategy and should be considered for future management of natural heritage features and functions within the subject lands. These impacts have been outlined in Table 10 below. 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M 6 PREFERRED SOLUTION Based on the evaluation of Technical Environment, Social/Economic Environment and Natural Environment, Alternative 4 is the preferred solution. Alternative 4 also has the highest environmental score of all alternatives. With a suitable restoration plan developed, alternative 4 has the potential to improve upon the existing natural environment conditions. Alternative 1 maintains the existing natural environment, while Alternatives 2 and 3 have the most potential to negatively impact the natural environment as well as SAR habitat in the area. The existing Hidden Valley Road culvert is heavily sedimented, with the low flow culvert being almost entirely buried. The existing blockage reduces the conveyance of the crossing and is currently a complete barrier to fish and wildlife passage. As there are currently no fish upstream of the Hidden Valley culvert, and due to the presence of a restricted species and its critical habitat, the introduction of fish into this system is not recommended. The proposed design shall incorporate fish exclusion measures, while still providing connection opportunities for amphibious and terrestrial species such as Snapping Turtle. Within the Hidden Valley Creek, the terrestrial ecosystem has experienced significant erosion, and the introduction of non-native and invasive species. Through the development of a comprehensive restoration plan, the natural banks could be restored, removing any non-native species and planting with native vegetation. 6.1 Identified Natural Heritage Features The following natural heritage features, as identified in the City of Kitchener Official Plan and the Region of Waterloo Official Plan, have been identified within the vicinity of the proposed area for Alternative 4: • ESPA 27: Hidden Valley. Along Hidden Valley Creek. • Locally Significant Valleyland. Along Hidden Valley Creek. • Located within the adjacent lands (<120 m) to Hidden Valley PSW. • Regionally Significant Woodland. Along Hidden Valley Creek. 6.2 Aquatic Habitat and Fisheries • The Grand River and its tributaries are identified as warmwater fish habitat. • Extensive field surveys have been completed within the area, and there is no documented evidence of fish upstream of the Hidden Valley Culvert (LGL, 2023). Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 32 A Montrose Environm12®t;iPt(7f pfQ162 • A seep is present immediately upstream of the Hidden Valley Road culvert and appears to be originating from the southwest direction. 6.3 Vegetation Communities and Plants • No rare plant communities, SAR, SCC, or locally rare plants were identified within the area surrounding the Hidden Valley Road culvert. • The ELC communities within this area are forested and include FOD5-2 and CUP on the west side of the culvert, and FOC3 on the east side of the culvert. 6.4 Wildlife • Seven species at risk and five species of conservation concern have been identified as potentially occurring within the area of the preferred alternative. • A restricted species and its critical habitat has been previously confirmed within the Hidden Valley Wetland Complex. This species is sensitive to predation by fish and may be currently benefiting from the absence of any fish within the Hidden Valley Creek system. Table 11 SAR and SCC Potentially Present Within the Vicinity of Alternative 4 Notes: END - endangered ESA - Endangered Species Act SARA - Species at Risk Act SC - special concern THR - threatened Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 33 A Montrose Environmf2at,jat(7(6ApufQ162 ESA SARA Probability Common Name Latin Name Avian Status Status Occurrence Bald Eagle Haliaeetus leucocephalus �`!T No Status Low Barn Swallow Hirundo rustica SC SC Moderate Eastern Wood -pewee Contopus virens SC SC Low Wood Thrush Hylocichla mustelina SC THR Low Black Ash Flora Fraxinus nigra END No Status Low Butternut luglans cinerea END END Low Restricted species Herpetofauna Restricted species END END Low Snapping Turtle Chelydra serpentina SC SC Moderate Eastern Small -footed Myotis Mammals Myotis leibii END N/A Moderate Little Brown Myotis Myotis lucifugus END END Moderate Northern Myotis Myotis septentrionalis END END Moderate Tri -colored Bat Perimyotissubflavus END END Moderate Notes: END - endangered ESA - Endangered Species Act SARA - Species at Risk Act SC - special concern THR - threatened Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 33 A Montrose Environmf2at,jat(7(6ApufQ162 6.5 Significant Wildlife Habitat The following SWH types are potentially present within the proposed area for Alternative 4: • Raptor Wintering Area • Bat Maternity Colonies • Turtle Wintering Areas • Bald Eagle and Osprey Nesting, Foraging, and Perching Habitat • Turtle Nesting Areas • Seeps and Springs • Habitat for Special Concern and Rare Wildlife Species 7 PROJECT IMPLEMENTATION AND NEXT STEPS The following sections outline the anticipated permitting and approvals required for the construction of the preferred alternative, the recommended studies to be completed during the detailed design phase and provides a list of suitable best management practices for construction. These recommendations should be carried forward, and updated where additional information is received. 7.1 Permitting and Approvals It is anticipated that the construction of Alternative 4 would require consultation with the DFO, the City of Kitchener, and the MECP. The following subsections will outline each of the approvals or reviews that may be required for this project. Department of Fisheries and Oceans Canada The preferred solution, which is the replacement and expansion of the culvert system under Hidden Valley Road, would require the submission of a request for review (RFR) to the DFO. During the submission process, information on aquatic habitat and the proposed impacts of the works would be provided to the DFO. If it is determined that the project will cause the death of fish and/or harmful alteration, disruption, or destruction of fish habitat, then a letter of approval (LOA) or full authorization under the Fisheries Act may be required. Due to the presence of fish downstream of the Hidden Valley Culvert, it is anticipated that an RFR and/or a LOA may be required. Any in water works should be completed according to the timing windows for warmwater fisheries, with any fish being relocated prior to these works occurring. To support the fish rescue, a Scientific Fish Collection License for Scientific Purposes, and a Wildlife Scientific Collectors Authorization from the MNRF would be required. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 34 A Montrose Environml2ai;JA8(HpfQ162 As the repairs to the Hidden Valley Culvert will involve the removal of one of the fish barriers, additional fish exclusion measures would be required to continue protecting the restricted species upstream. Fish exclusion measures shall be regularly monitored to ensure that they are functioning correctly. City of Kitchener Both the upstream and downstream portions of the Hidden Valley Road culvert are located within forested areas. It is anticipated that at least some trees will be damaged, destroyed, or slated for removal as part of the preferred solution. A tree inventory and arborist report should be completed during the detailed design phase of this project. The tree inventory will identify and assess the condition of each tree within the vicinity of the proposed works. The arborist report will compile this information and provide an assessment of each individual tree and whether it shall be retained, injured, or removed. The arborist report shall meet the necessary requirements to apply for a tree removal permit from the City of Kitchener, should they request that one be completed. Ministry of Environment, Conservation, and Parks Through the construction of the preferred solution, it is expected that at least some trees will require trimming or removal. To date, no bat cavity assessments or acoustic monitoring has been completed within the vicinity of the preferred solution. Prior to the removal of any trees, Matrix recommends that a bat cavity assessment be completed within the area. This assessment will identify whether any snag trees are present and whether they are considered high- or low -quality bat habitat. Following this assessment, an Information Gathering Form (IGF) and/or Notice of Assessment should be submitted to the MECP for review. Should only a few cavity trees be identified for removal, the preferred solution would satisfy the requirements under the General Regulations (O. Reg. 242/08) of the ESA for threats to health and safety, not imminent (Section 23.18). The proposed works would include repairs and upgrades to existing infrastructure under Hidden Valley Road, with the goal of protecting municipal infrastructure from future flooding. Although the area of impact for the preferred alternative is located outside of the Regulated Habitat for the restricted species, it is still located within the 300 m of adjacent lands. It is anticipated that a single IGF can be submitted for all of the impacted SAR, and that obtaining a C -permit would not be required. 7.2 Construction Mitigation Measures The recommendations and general best management practices described below are intended to limit potential impacts within the subject lands and to adjacent natural heritage features. Emphasis should be placed on confining construction access, construction equipment, stockpiles, and re -fueling to lawns, paved surfaces, and other existing disturbed areas where available. The following recommendations are designed to mitigate and minimize potential impacts on the aquatic environment. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 35 A Montrose Environmf2®t,JA866pfQ162 Wildlife Timing Windows • Breeding Birds: Any vegetation removal must adhere to the Migratory Birds Convention Act timing windows. The Migratory Birds Convention Act protects migratory birds, their eggs, and their nests from being harmed or destroyed during the breeding bird window. The core breeding period for Zone C2 is early April 1 to August 25 (ECCC 2023). Any woody vegetation removal required to facilitate the proposed works should be undertaken outside of this window. Should any vegetation clearing be required within the nesting season, a qualified avian biologist shall undertake nest sweeps prior to tree removal to ensure that no nests are present. • Fisheries: Any in -water works should adhere to Fisheries and Oceans Canada (DFO) in -water works timing restrictions for a warmwater system, identified as March 15 to July 15 or as directed by MNRF or DFO (DFO 2019). Construction Best Management Practices • Avoidance of Sensitive Areas: Equipment or materials storage, vehicle parking and soil storage should be kept 30 m away from sensitive natural heritage features such as watercourses, wetlands, and woodlots. Should space limitations create the need for stockpiling equipment or parking vehicles within the buffer to the forest, a certified arborist should provide recommendations to avoid impacts to edge trees. • Site Delineation: The extent of the work area shall be clearly delineated, visible to all workers on site, and maintained regularly. Suitable delineation measures can include but are not limited to sediment fencing, reptile exclusion fencing, tree protection fencing or hoarding, and/or wooden stakes. No construction activities, including the storage of materials, are to occur outside of these delineated areas. • Maintenance and Refueling: All equipment maintenance and refuelling shall be conducted a minimum of 30 m from any sensitive natural heritage features including but not limited to wetlands, watercourses, and woodlots. A suitable secondary containment method is required for all refuelling to prevent the accidental discharge of petroleum products to the environment. • Contaminant and Spill Response Plan: An emergency spill response and management plan shall be developed and followed throughout the duration of construction. An emergency spill kit, suitable for the type of work, shall be kept on site at all times. • Erosion and Sediment Control (ESC): An ESC plan shall be developed and implemented throughout the duration of construction and restoration of the site. This plan shall effectively control sedimentation and erosion within and adjacent to the work areas. The primary principles associated with sedimentation and erosion protection measures are to: o minimize the duration of soil exposure o retain existing vegetation, where feasible Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 36 A Montrose EnvironmRat,U8 i Q162 o encourage revegetation o divert runoff away from exposed soils o keep runoff velocities low o trap sediment as close to the source as possible • Traffic Limits: Implement speed or traffic limits within and adjacent to natural areas. For areas with loose or dry soils, a dust management or suppression plan may be required. • Worker Education: All workers on site shall be aware of potential wildlife occurrences and educated on measures to take to minimize potential for injury or incidental take. A log to record and report incidents of injury and/or mortality shall be maintained by the prime contractor. • Restoration: A restoration plan shall be developed in consultation with a qualified ecologist and implemented throughout the duration of the project. Restoration of the site should be completed as soon as possible, immediately after each phase of construction is complete. Exposed soils should be seeded during the growing season. Should any soils be left exposed after November 15, erosion control blankets, or a similar material, shall be used to stabilize the soils until vegetation has regrown. Prevention of Terrestrial Disturbance • Incidental Wildlife Occurrences: No wildlife shall be handled or relocated without a Wildlife Scientific Collectors Permit from the MNRF. If sensitive or SAR species are suspected, a qualified ecologist should be contacted immediately to inquire about next steps. A setback shall be established by the qualified ecologist to protect the species until guidance has been received from the MECP. Details regarding the size and implementation of the setback should be determined in consultation with the MECP. Should the species be identified within the construction footprint, a relocation plan may be drafted in consultation with the appropriate agencies. • Breeding Birds: Should an avian nest be identified within proximity to the work locations, all work within the vicinity shall be stopped immediately and a qualified biologist shall be contacted. A qualified biologist shall attend site to identify the species present and to provide a suitable setback for this species. Setbacks are conservatively determined based on the individual species, their tolerance to disturbance, and the type of works occurring within the area. Should a SAR, SCC, or Schedule 1 bird be observed, further consultation with the MECP is required, and consultation or permitting through the Migratory Birds Convention Act (MBCA) may be required. • Removal of Trees: A tree inventory and arborist report shall be completed by a qualified biologist prior to the removal, damage, or destruction of any trees. This report will identify whether any SAR trees are present, and will provide guidance, recommendations, and next steps for consultation with the MECP. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 37 A Montrose Environml2ai;JA8fr8pufQ162 • Exclusion Fencing: Suitable exclusion fencing shall be installed and maintained throughout the duration of the construction period. The fencing plan shall be developed in consultation with a qualified biologist and shall ensure that no species at risk reptiles or amphibians are able to enter the construction site. Exclusion fencing shall be monitored regularly to ensure that it is functioning well and has not deteriorated. Shall any individuals be found within the work area, all work shall immediately be halted, and a qualified biologist will be contacted. The individual will be relocated outside of the work zone by the qualified biologist, as approved under the Wildlife Scientific Collectors Permit from the MNRF. • Invasive Species: Construction shall follow the clean equipment protocol (Halloran et al. 2016) to prevent the further spread of invasive species. Removal of all invasive species within the construction limits shall occur, including root systems, where feasible. Disposal of invasive species shall be administered in an appropriate manner following accepted and approved disposal guidelines from governing agencies. Prevention of Aquatic Disturbance • Riparian Vegetation Removals: Clearing of riparian trees and/or shrubs should be minimized where possible, such that physical and biological functional attributes of the terrestrial vegetation can be maintained as they relate to aquatic ecological function. Removals should be completed through consultation with an ecologist to avoid any sensitive species. • Fish Salvage: If disturbance to the watercourse is anticipated during periods of high flows and/or when fish could potentially occur, the watercourse should be surveyed to determine if fish are present. If fish are present, in -water works and nearby construction should adhere to Fisheries and Oceans Canada (DFO) in -water works timing restrictions for a warmwater system, identified as March 15 to July 15 or as directed by MNRF or DFO (DFO 2019). Should fish be present, a fish salvage would be required. Prior to this, a qualified biologist will need to obtain a Scientific Fish Collection License for Scientific Purposes, and a Wildlife Scientific Collectors Authorization from the MNRF. • Fish Exclusion: The design of the preferred alternative shall include permanent fish exclusion measures to ensure that no fish are able to pass upstream of the Hidden Valley Culvert. These exclusion measures shall be regularly monitored, to ensure that they are functioning correctly. 7.3 Recommended Studies The following studies are recommended to be completed as part of the detailed design phase of the project: Tree Inventory and Arborist Report A high-level vegetation inventory was completed by Matrix within the area surrounding the preferred alternative as part of this report. Although no species at risk or locally rare species were observed by Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 38 A Montrose Environml2at,JA8(HpfrQ162 Matrix within the vicinity of the preferred alternative, both butternut and black ash have the potential to occur. As part of the detailed design phase of this project, a tree inventory and arborist report should be completed. The tree inventory will identify the species and assess the condition of each tree within the vicinity of the proposed works. The arborist report will compile this information and provide an assessment of each individual tree and whether it shall be retained, injured, or removed. Bat Cavity Assessment Although a bat cavity assessment and acoustic monitoring has been completed on the northwestern portion of the subject lands, no studies have been completed within the vicinity of the preferred alternative. A bat cavity assessment should be completed early on in the detailed design phase of the project, to determine whether any high-quality bat cavity trees are present, and whether these trees may require removal as part of the design. Fisheries Assessment A high-level aquatic assessment was completed by Matrix within the area surrounding the preferred alternative as part of this report. Although a DFO request for review would be required for this project, it is not anticipated that a full DFO authorization or a detailed fisheries assessment would be required. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 39 A Montrose Environml2at,1A(7(7rOpfQ162 8 REFERENCES Bird Studies Canada (BSC), 2006. Environment Canada's Canadian Wildlife Service, Ontario Nature, Ontario Field Ornithologists and Ontario Ministry of Natural Resources. Ontario Breeding Bird Atlas Database. http://www.birdsontario.org/atlas/index.jsp Bird Studies Canada. 2023. 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Natural Heritage Information Centre, Ontario Ministry of Natural Resources. Peterborough, Ontario. 188 pp. Ontario Ministry of Municipal Affairs and Housing (MMAH). 2020. Provincial Policy Statement, 2020. Issued under Section 3 of the Planning Act. King's Printer for Ontario, 2020. Toronto, Ontario. May 1, 2020. Ontario Ministry of Natural Resources (MNR). 2000. Significant Wildlife Habitat Technical Guide. Fish and Wildlife Branch, Wildlife Section, Science Development and Transfer Branch, Southcentral Sciences Section. October 2000. 2000. Ontario Ministry of Natural Resources (MNR). 2010. Natural Heritage Reference Manual for Natural Heritage Policies of the Provincial Policy Statement, 2005. Second Edition. King's Printer. Toronto, Ontario. March 18, 2010. 2010. Ontario Ministry of Natural Resources and Forestry (MNRF). 2015. Significant Wildlife Habitat Criteria Schedules for Ecoregion 6E. Regional Operations Division, Southern Region Resources Section. Peterborough, Ontario. 2015. Ontario Ministry of Natural Resources and Forestry (MNRF). 2022. Ontario Wetland Evaluation System, Southern Manual. 4th Edition. December 2022. https://www.ontario.ca/files/2023-02/mnrf-pd- rpdpb-ontario-wetlands-evaluation-system-southern-manual-2022-en-2023-02-02.pdf Ontario Ministry of Natural Resources and Forestry (MNRF). 2023a. Ontario GeoHub. Accessed May 2023. https:Hgeohub.lio.gov.on.ca/ Ontario Ministry of Natural Resources and Forestry (MNRF). 2023b. Natural Heritage Information Centre. Accessed May 2023. https://www.ontario.ca/page/natural-heritage-information-centre Ontario Nature. 2023. Ontario Reptile & Amphibian Atlas. Accessed May 2023. https://www.ontarioinsects.org/herp/index.html?Sort=1&areal=squaresCounties&records=all& myZoo m=5 & Lat=42.95 & Lo ng= -81.01 Regional Municipality of Waterloo. Planning and Works Committee. Agenda for Tuesday March 4th, 2014, 2pm. Regional Council Chambers. 150 Frederick Street, Kitchener. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 42 A Montrose Environml2aa dr8 pfQ162 Region of Waterloo. 2015. Region of Waterloo Official Plan. https://www.regionofwaterloo.ca/en/regional-government/land-use-pIanning.aspx#Regional- Official-Plan Region of Waterloo. 2016. Greenlands Network Implementation Guideline. https://www.regionofwaterloo.ca/en/living- here/resources/Documents/Greenlands_Network_lmplementation_Guideline_Final-draft access.pdf Region of Waterloo. 2020. Rare Species List. Updated by Pat Deacon, downloaded from iNaturalist. Stanfield L. (editor). 2010. Ontario Stream Assessment Protocol. Version 8.0. Fisheries Policy Section. Ontario Ministry of Natural Resources. Peterborough, Ontario. 376 pages. Toronto Entomologists' Association (TEA). 2023a. Ontario Butterfly Atlas. Accessed May 2023. http://www.ontarioinsects.org/atlas_online.htm Toronto Entomologists' Association (TEA). 2023b. Ontario Moth Atlas. Accessed May 2023. https://www.ontarioinsects.org/moth/ WSP Group Canada Ltd. (WSP). 2020. River Road Extension -Detailed Design Stage 1 — Manitou Drive to King Street Kitchener Ontario Scoped Environmental Impact Study. Prepared for the Region of Waterloo. March 2020. WSP. 2021. Stage 2 ION: Light Rail Transit from Kitchener to Cambridge. Environmental Project Report. Matrix Solutions Inc. 31809 Hidden Valley NH R 2024-03-12 Final V1.O.docx 43 A Montrose Environml2at,1A8(7Apf 1162 Page 775 of 2162 1. Hidden Valley west tributary. 2. Edge of the MAS2-1 community within the northwestern portion of the subject lands. 1 Page ' ofi �%Inc. City of Kitchener Hidden Valley Flood Risk Reduction EA Natural Heritage Existing Conditions Report Appendix A Site Photographs r � 1 - �, f i:va� A � ,• Appendix A Site Photographs City of Kitchener Hidden Valley Flood Risk Reduction EA Natural Heritage Existing Conditions Report Appendix A Site Photographs 11,r r- �A 7. Hidden Valley Creek. Immediately downstream of the Hidden Valley Road culvert. Woody debris located within Hidden Valley Creek. Page ' ofi �%Inc. Page 780 of 2162 TABLE B3 Bird Soecies Scientific Name Accipitercooperii Cooper's Hawk S4 x x x x Accipiter gentilis Northern Goshawk S4 x Accipiter striatus Sharp -shinned Hawk S5 x x Buteojamoicensis Red-tailed Hawk S5 x x x x Buteo lagopus Rough -legged Hawk SIB/S4N x Buteo platypterus Broad -winged Hawk S513 x Circus cyaneus Northern Harrier S413 x x Haliaeetus leucocepholus Bald Eagle S2N/548 Sci� x x x FTrrlr Eremophila alpestris Horned Lark S513 x x Megaceryle alcyon Belted Kingfisher S4B/S5B x x x Chaetura pelagic. Chimney Swift S4B/S4N THR THR THR x x x Aixsponsa Wood Duck S5 x x x Anus acuta Northern Pintail S5 x Anus clypeata Northern Shoveler S4 x Anus crecco Green -winged Teal S4 x Anas discors Blue -winged Teal S4 x x x Anasplatyrhynchos Mallard S5 x x x x Anas rubripes American Black Duck S4 x x Branta canadensis Canada Goose S5 x x x x Branta hutchiinsii Cackling Goose S4M x Bucephala albealo Bufflehead S4 x Bucephala clangula Common Goldeneye S5 x x Clangula hyemalis Long-tailed Duck S313 x Lophadytes cucullatus Hooded Merganser S513, S5N x x x Melanitta furca White -winged Scoter S4B/S4N x Aythya collaris Ring-necked Duck S5 x Cygnus columbionus Tundra Swan S4 x Mergus merganser Common Merganser S5B,S5N x x x x Herons and Bitterns ___----__ Arden alba Great Egret S213 x x Ardeaherodias Great Blue Heron S4 x x x x Butorides virescens Green Heron S413 x x x x Bombycillo cedrorum Cedar Waxwing S513 x x x x Chordeiles minor Common Nighthawk S413 SC SC THR x x • Cardinalis cordinalis Northern Cardinal S5 x x x x Passerina cyanea Indigo Bunting S413 x x x Pheucticus ludovicianus Rose -breasted Grosbeak S46 x x x x Piranga olivacea Scarlet Tanager S413 x x x Cathartes aura Turkey Vulture S513 x x x x Certhia americana Brown Creeper S513 x x x Charadriussemipalmatus Semipalmated Plover S4B,S4N x Charadrius vociferus Killdeer S5B/S5N x x x x Columba livia Rock Pigeon SNA x x x x Zenaido macroura Mourning Dove S5 x x x x Ma&ftSoludanslnc. Page 781 of12162 �. A Montrose Environmental Company Scientific Name Common Name mum= Corvus brachyrhynchos American Crow S5B/S4N x x x x Corvus corax Common Raven 55 x x Cyanpcitto cristata Blue Jay 55 x x x x Coccyzus americanus Yellow -billed Cuckoo S4B x x x Coccyzus erythropthalmus Black -billed Cuckoo S5B x x x Emberizidae New World Sparrows & Allies ___----__ Ammodmmushenslowii Henslow's Sparrow SHB END END END x Junco hyemalis Dark -eyed Junco S5B x x Melospiza georgiona Swamp Sparrow S5B x x x Melospiza melodic Song Sparrow S5B/S4N x x x x P.sserculus sandwichensis Savannah Sparrow S4B x x x Posserell. iliac. Fox Sparrow S4B x Pipilo erythrophthalmus Eastern Towhee S4B x x x Pooecetes gromineus Vesper Sparrow S4B x x Spizello arbores American Tree Sparrow S4B x x Spizello pollido Clay -colored Sparrow S4B x x Spizella posserino Chipping Sparrow S5B/S4N x x x Zonotrichio albicollis White -throated Sparrow S5B x x Zonotrichic leucophrys White -crowned Sparrow 54B x x Spizella pusillo Field Sparrow 54B x x x Falco columbarius Merlin 55B x x Falm peregrinus Peregrine Falcon S3B SC x Falco sparverius American Kestrel 54 x x x Acanthis flammea Common Redpoll 54B x Haemorhous mexicanus House Finch SNA x x x x Haemorhous purpureus Purple Finch S4B x Loxia leucoptera White -winged Crossbill S5B x Spinus pinus Pine Siskin S4B x x Spinus iritis American Goldfinch S5B/S4N x x x Grus conadensis Sandhill Crane 55B x Hirundinidae ___----__ Hirundo rustica Barn Swallow S4B SC SC x x x Petrochelidon pyrrhonoto Cliff Swallow 54B x x x Progne subis Purple Martin 53/54B x Riparia riparia Bank Swallow S4B THR THR THR x x x x Stelgidopteryx serripennis Northern Rough -winged Swallow S4B x x x Tochycineta bicolor Tree Swallow 54B x x x Ageloius phoeniceus Red -winged Blackbird 54/55 x x x x Dolichonyx oryzivorus Bobolink S4B THR SC x x x Euphogus c.rolinus� Rusty Blackbird S4B SC SC SC x Icterus galbula Baltimore Oriole 54B x x x x Icterus spurius Orchard Oriole 54B x Molothrus ater Brown -headed Cowbird 54B x x x Quiscalus quiscula Common Grackle 55B/S4N x x x Stumello magna Eastern Meadowlark 54B THR THR THR x x x Xanthocepholus xanthocepholus Yellow -headed Blackbird 52B x Lanius ludovicianus Loggerhead Shrike S2B END END END x MIM _rAMMI.Tmalf", Hydroprogne cospia Caspian Tern 53B x Larus argentatus Herring Gull 55B,S5N x Lar,, delawarensis Ring -billed Gull S5B/S4N x x x Mabftsolatiomnsrnr Page 782 of22162 Scientific Name Common Name Mimidae Mockingbirds, Thrashers & Allies Dumetello corclinsis Gray Catbird S4B x x x Toxostoma rufum Brown Thrasher S4B x x x • RT , - ----_-_-- Pandion haliaetus Osprey S5B x x x x W.1 IrK4 Poecile atricapillus Black -capped Chickadee S5 x x x Cardellina pusilla Wilson's Warbler S4B x Geothlypis philadelphia Mourning Warbler S4B x Geothylupis trichas Common Yellowthroat S5B x x x x Mniotilto varia Black -and -white Warbler S5B x x x Oreothlypis peregrine Tennessee Warbler S5B x x Oreothlypis ruficapillo Nashville Warbler S5B x x x Parkesia motocilla Louisiana Waterthrush S3B THR THR THR x x Parkesia noveboracensis Northern Waterthrush S5B x x Seiurus ourocapilla Ovenbird S4B x x x Setophaga coemlescens Black -throated Blue Warbler SSB x x Setophaga costanea Bay -breasted Warbler S5B x Setophaga cerulea Cerulean Warbler S3B. THR END END x. Setophaga coronato Yellow Rumped Warbler S5B x x Setophaga fusca Blackburnian Warbler S5B x Setophaga magnolia Magnolia Warbler S5B x x Setophaga pensylvanica Chestnut -sided warbler S5B x x Setophaga petechai Yellow Warbler S5B x x x Setophaga pinus Pine Warbler SSB x x x x Setophaga ruticilla American Redstart S5B x x x Setophaga striata Blackpoll Warbler S4B x x Setophaga virens Black -throated Green Warbler S5B x x Vermivora chrysoptern Golden -winged Warbler S4B SC THR THR x Vermivora cyanoptera Blue -winged Warbler S4B x Passer domesticus House Sparrow SNA x x x x • Pholacrocomx auritus Double -crested Cormorant SSB x x x • Meleagris gallopavo Wild Turkey S5 x x x x Bonoso umbellus Ruffed Grouse S4 x x Coloptes ouratus Northern Flicker S4B x x x x Dryocopus pileatus Pileated Woodpecker S5 x x x x Leuconotopicus villosus Hairy Woodpecker S5 x x x Melonerpes carolinus Red -bellied Woodpecker S4 x x x x Melanerpes erythrocephalus Red-headed Woodpecker S4B END END END x x x Picoides pubescens Downy Woodpecker S5 x x x x Sphyrapicus vorius Yellow -bellied Sapsucker SSB x x x x Podicipedidae Podilymbuspodiceps Pied -billed Grebe S4B,S4N x x Polioptilo caerulea Blue -gray Gnatcatcher S4B x x x Porzano caroling Sora S4B x x Rollus limicolo Virginia Rail S5B x x '� t' A1Man�XE�ronmCsomppan Page 783 of32162 Scientific Name Common Name mum= Regulidae MLW�. INN Al Regulus calendula Ruby-crowned Kinglet S4B x x Regulus satraps Golden-crowned Kinglet S5B x x Actitis mocularius Spotted Sandpiper SS x x x Cclidris fusciccllis White-rumped Sandpiper S5N x Gallinago delicata Wilson's Snipe S5B x Scolopax minor American Woodcock S4B x x x Lesser Yellowlegs 54B,54N THR x x Tringo melanoleuca Greater Yellowlegs S4B,S4N x x 6Tringaflavipes Nutchatches mmmmomomm Sittoconadensis Red-breasted Nuthatch S5 x x x Sitto corolinensis White-breasted Nuthatch 55 x x x x Asio flammeus Short-eared Owl S2N,S4B THR x Asio otus Long-eared Owl S4 x Bubo virginianus Great Horned Owl S5 x x x x Megascops asio Screech Owl S4 x x Stumus vulgaris European Starling SNA x x x x Archilochus colubris Ruby-throated Hummingbird S5B x x Troglodyticlae Cistothorus palustris Marsh Wren S4B x x Thyrothorus ludovicianus Carolina Wren S4 x x Troglodytes aedon House Wren S5B x x x Troglodytes hiemalis Winter Wren S5B x x MUMUr Catharus fuscescens Veery S4B x x x Catharus guttatus Hermit Thrush S5B x Catharus ustulatus Swainson's Thrush S4B x x Hylocichla mustelino Wood Thrush S4B SC THR THR x x x x Sialia sialic Eastern Bluebird SSB x x Turdus migratorius American Robin S5B x x x x Contopus virens Eastern Wood-pewee S4B SC SC SC x x x Empidonax alnorum Alder Flycatcher S5B x Empidonaxflaviventris Yellow-bellied Flycatcher S5B x Empidonax minimus Least Flycatcher S4B x x x Empidonax traillii Willow Flycatcher S5B x x x Empidonax virescens Acadian Flycatcher S2S3B END END END x x Myiarchus crinitus Great Crested Flycatcher S4B x x x Sayornis phoebe Eastern Phoebe S5B/S4N x x x Tyrannus tyrannus Eastern Kingbird S4B x x x i �a�SOror" Ota'sz� Page 784 of42162 Vireo gilms Warbling Vireo S513 x x x Vireo olivaceus Red -eyed Vireo S513 x x x Vireo solitarius Blue -headed Vireo S513 x Vireo flavifrons Yellow -throated Vireo S413 x x x Vireo philadelphicus Philadelphia Vireo S513 x x Notes: S -rank COSEWIC SS- Critically Imperiled NAR - Not at Risk S2 - Imperiled SC - Special Concern S3 - Vulnerable THR - Threatened S4- Apparently Secure END -Endangered S5 -Secure EXT - Extinct SO - Unrankahle EXP - Extirpated SNA - Unranked DD - Data Deficient SX - Presumed Extirpated SH - Possibly Extirpated SARA Schedule Sp? - Rank Uncertain Schedule 1 - Officially protected under SARA Schedule 2 -threatened/endangered; may be reassessed for consideration for inclusion to Schedule 1 ESA Schedule 3 - special concern; may he reassessed for consideration for inclusion to Schedule 1 SC - Special Concern THR- Threatened COSSARO END - Endangered NAR - Not at Risk EXT - Extinct SC - Special Concern THR - Threatened END - Endangered Additional Notes EXP - Extirpated ESA- Endangered Species Act DO - Data Deficient COSEWIC - Committee on the Status of Endangered Wildlife in Canada SARA - Species at Risk Act NHIC - Natural Heritage Information Centre OBBA - Ontario Breeding Bird Atlas Sources: 1 Ontario Ministry of Natural Resources and Forestry (MNRF). 2023. Make Map: Natural Heritage Areas. Mapping application. Accessed MAY 2023. https://www.lioapplications.irc.gm.on.ca/Natural_Heritage/index.html?viewer=Natural_Heritage. Natural_Heritage&locale=en-CA 2 Birds Canada et al. 2023. Ontario Breeding Bird Atlas Data Summary Tool. NatureCoums platform. Accessed MAY 2023. https://naturecounts.ca/nc/onatias/findsquare.jsp 3 Cornell Lab of Ornithology. 2023. eBird. Accessed MAY 2023. hnps:Hebird.org/home 4 iNaturalist. 2023. Observations. Accessed MAY 2023. https://www.inaturalist.org/observations 5 Hidden Valley Draft Characterization Report. Comprehensive Environmental Impact Study for the City of Kitchener (LGL, 2023. Draft) 6 Schedule B Class Environmental Assessment. Upper Hidden Valley Sanitary Pump Station and Forcemain (MITE Consultants Inc., 2022) 7 Stage 2 ION LRT from Kitchener to Cambridge Transit Project Assessment Process (WSP, 2021) AA anEnvironmental &X�sz/i� MPage 785 of52162 TABLE 2 Reptile and Amphibian Species Scientific Name CryptGdeira Turtles Chelydra serpentinaSnapping Chrysemys picto morginoto Emydaide. blandingii Trochemys scripto elegans Species Common Name Turtle Midland Painted Turtle Blandings Turtle Red -eared Slider Provincial S3 S4 S3 SNA Conservation Rank Provincial National MOO= SC SC SC x x x x x x x x THR END THR x x x Squa.ata Snakes Lampropeltis triangulum Milksnake S4 SC SC x x x Nerodia sipedon sipedon Northern Watersnake S5 x Opheodrys vernalis Smooth Greensnake S4 x Storeria dekayi DeKay's Brownsnake S5 x x Storeria occipitomaculata 7hamnaphis sourit 7hamnaphis sirtalis sirtalis Red -bellied snake Eastern Ribbonsnake Eastern Gartersnake S5 S5 x x x x Caudata Salamanders Ambystoma laterale Blue -spotted Salamander S4 x Ambystoma maculatum Spotted Salamander S4 x x x Notophthalmus viridescens viridescens Eastern Newt S4? x Notophthalmus viridescens viridescens Red -spotted Newt S5 x x Plethodon cinemus Eastern Red -backed Salamander S5 x x x Anura Frogs Anaxyrus americanus and Toads American Toad S5 x x x Hyla versicolor Gray Treefrog S5 x x x Lithobates catesbeianus American Bullfrog S4 x x Lithobates clamitans Green Frog S5 x x x Lithobates pipiens Northern Leopard Frog S5 x x x Lithobates sylvaticus Wood Frog S5 x x Pseudocris crucifer Total: Spring Peeper S5 x x x 4 21 13 14 Sources: 1 Ontario Ministry of Natural Resources and Forestry (MNRF). 2023. Make a Map: Natural Heritage Areas. Mapping application. Accessed MAY 2023. hnps://www.lioapplications.irc.gm.on. ca/Natural_Heritage/ind-.html?viewer=N atural_Heritage. Natural_Heritage&locale=en-CA 2 Naturalist. 2023. Observations. Accessed MAY 2023. hnps://www.inaturalist.org/observations 3 Hidden Valley Draft Characterization Report. Comprehensive Environmental Impact Study for the City of Kitchener (LGL, 2023. Draft) 4 Schedule B Class Environmental Assessment. Upper Hidden Valley Sanitary Pump Station and Forcemain (MTE Consultants Inc., 2022) 5 Stage 2 ]ON LRT from Kitchener to Cambridge Transit Project Assessment Process (WSP, 202 1) Matrix Solutions Inc. Page 786 of12162 Notes: S -rank COSEWIC Sl- Critically Imperiled NAR -NDtat Risk S2 - Imperiled SC -Special Concern S3 -Vulnerable THR-Threatened SL- Apparently Secure S5 Se END -Endangered EKT-ExtinR SU-Unrankable E%P-Extirpated SNA - Unranked DO - Data Deficient . - Presumed Extirpated THR-Threatened END -Endangered Additional Notes IXP-Extirpated ESA- Endangered Species Act DD -Data Deficient COSMIC -Committee Dn the Sdtus Df Endangered Wildlife in Canada SARA -Species at Risk Act ®mmm��aaa DFI - Fisheries and Oceans Canada LID -Land Information Ontario Gasterpsteifprmes Perc'rfprmes P--yzpntifprmes 5almpn'rfprmes 5ilurifprmes Total 2 1 2 33 2 Notes: S -rank COSEWIC Sl- Critically Imperiled NAR -NDtat Risk S2 - Imperiled SC -Special Concern S3 -Vulnerable THR-Threatened SL- Apparently Secure S5 Se END -Endangered EKT-ExtinR SU-Unrankable E%P-Extirpated SNA - Unranked DO - Data Deficient . - Presumed Extirpated THR-Threatened SH- Possibly Extirpated 1-1,edule Sp? -Rank Uncertain Schedule l-Officiallyp--d under SARA Schedule 2 - threatened/endangered; may be reassessed for consideration for inclusion to Schedule 1 ESA Schedule 3 -special concern; maybe reassessed for consideration for inclusion to Schedule 1 SC -Special C.—n THR-Threatened COSSARO END -Endangered NAR-Notat Risk SC -Special Concern THR-Threatened END -Endangered Additional Notes IXP-Extirpated ESA- Endangered Species Act DD -Data Deficient COSMIC -Committee Dn the Sdtus Df Endangered Wildlife in Canada SARA -Species at Risk Act NHIC -Natural Heritage Information Centre DFI - Fisheries and Oceans Canada LID -Land Information Ontario Sources: l Ontario Ministryof Natural Resources and Forertry (MNRFi. 2023. Make a Map: Natural Heri[oge Areas. Mapping application. Accessed MAY 2023. https://www.lioapplicatiois.lrcgov.on.ca/Natural Heritage/index.html?viewer=Natural Hentage.Natural Heritage&bwle=en-CA 2 iNatiiralirt. 2023. Observations. Accessed MAY 2023. https://www.ina uralirt.orpfobservations 3 Fisheries and Oceans Canada (DFOi. 20Ll.ARuatic Species at Risk Map. Accessed MAY 2(123. https://vnww.dfo-mpo.gcca/species-especes/sara-lep/map-cart�ndex-eng.h[ml 4OntariD Ministry of Natural Resoumes and Forertry (MNRF). 2023. 0—GeaHub. Open data resource through Land Information Ontario. Accessed MAY Wn. https://geohub.liD.gov.on.ca/ 5 Hidden Valley Draft Characterization Report. Comprehensive Environmental Imp -SW dy for the City of Kitchener (LGL, 2023. CIA) 6 Schedule 0 Class EnNronmental Assessment Upper Hidden Valley Sanitary Pump Station and Forcemain (WE Co...In, is Inc., 2022) 2S ge 2 ION LRT from Kitch--W Cambndge Tran sit Proj—Assessment--IMP, 2021) 4^1Matnx$0i1/t10//$ Ipa Page 1 of 1 Page 787 of 2162 Ei11r=.ITiSZ�.SiR: Species Scientific Name Coleoptera Name Common Name Beetles Conservation Ranking Source Ontario Locally Ontario Moth S-RANK ESA COSEWIC SARA NHlCltl Butterfly iNat uralistlal Icl Other Studiesls's''1 Significant Atlas lel Atlas Conde. 1-gi1abd, Crinceris asparagi Common Asparagus Beetle Flies Diptera Mayflies Ephemeroptera Sucking Insects Homoptera Sawflies, Wasps, Bees, Ants Hymenoptera and European Honey Bee , Butterflies Lepidoptera Ancylocypha numitor Least Skipper Antheraea Polyphemus Polyphemus Moth Carterocephalus palaemon Arctic Skipper Celastrina lucia Northern Spring Azure Coenonympha tullia Common Ringlet Orange Sulphur Colias philodice Clouded Sulphur Cucullia nis Cupido . 5 77 Danaus Epa,gy,c., clarus Silver-spotted Skipper Euphyes bimacula Two-spotted Skipper Halysidota tessellaris Banded Tussock Moth 0 r��m� MonEnvironmental Page 788 of,2162 Species Scientific Name Name Common Name S -RANK ESA Conservation Ranking Source Ontao Moth Locally Ontario ri COSE WIC SARA NHIC(u Butterfly Significant iNaturalistl't) Atlas Iql Other Studies"'e''I Atlas ") Lathe antheclon Northern Pearly -Eye Lophoca pacaryae Hickory Tussock Moth Lophocampa maoulata Spotted Tussock Moth Lycaena hyllus Bronze Copper Nymphalis I -album Compton Tortoiseshell Pamnas excaecat Blinded Sphinx Phragmatobia fuliginosa Ruby Tiger Moth Phydocles cocyta Northern Crescent Polites mystic Long Dash Skipper Polites origenes Crossline Skipper Polites Perkins Peck's Skipper Portia protodice Checkered White Pyrrharctia Isabella Isabella Tiger Moth Smerinthus cerisyi One -eyed Sphinx MENER."W"".. Twin -spotted Sphinx Speyeria atlantis Atlantis Fritillary Vanessa atalanta Vanessa carclui Painted Lady American Lady Mantodea Mantises Odonata Damselflies and Dragonflies Argia moesta Powdered Dancer �_I'M &&Sq' m"G Page 789 ofz2162 Notes: S -rank cosmic Sl- Criticallylmperiled NAR -Notat Risk S2 -Imperiled SC - Special Concern S3 -Vulnerable THR-Threatened S4- Apparently Secure END -Endangered S5 -Secure EXT-Exti— SU-U,I—kable EXP - Extirpated SNA - Unranked DD - Data Deficient SX- Presumed Extirpated NHIC -Natural Heritage Information SH- Possibly Extirpated SARA Schedule S#? - Rank Uncertain Schedule l- Officially protected under SARA Schedule 2 -threatened/endangered; may be reassessed for...sideration for inclusion.. Schedule 1 ESA Schedule 3 - special ...cern; may be reassessed for ...sideration f.r inclusion I. Schedule I SC - Special Concern THR- Threatened COSSARO END -Endangered .NAR -Notat Risk SC - Special Concern THR- Threatened END - Endangered Additional Notes EXP -Extirpated ESA- Endangered Species Act DDD—Deficient COSMIC - Committee on the Status of Endangered Wildlife in Canada SARA - Species at Risk Act NHIC -Natural Heritage Information Centre Sources: 1 Ontario MWA y of Natural Resources and F ... rt,y (MNRF). 2023. Make a Map: Natural Heritage Areas. Mapping application. Accessed MAY 2023. https://www.lioapplications.)rcgov.on.ca/Natural_Heritage/index.himl?viewer=Natural_Heritage.Natural_Hedtage&locale=e.-CA 2 Toronto Entomologist,'Association (TEA). 2023. Ontario Butterfly Atlas. Accessed MAY 2023. https://www.ontarioinseRs.org/atlas/ 3 iNaturalist (IN—..list). 2023. Observation, Accessed MAY 2023. https://www.inaturalistorg/observations 4 Toronto Entomologist,' Association (TEA). 2023. Ontario Butterfly Atlas . Accessed MAY 2023. https://www.ontarioinsects.org/moth/index.html 5 Hidden Valley Draft Characterization Report. Comprehensive Environmental Impact Study for the City of Kitchener (LGL, 2023. Draft) 6 Schedule B Class Environmental Assessment. Upper Hidden Va11ey Sanitary Pump Station and Forcemain (MTE Consultants Inc., 2022) Stage 21ON LRT from Kitchener to Cambridge Transit Praj— Assessment Process (WSP, 2021) 0AM���'�O�I"G Page 790 of32162 TABLE Mollusc Species 312 312 Sources: 1 Ontario Ministry of Natural Resources and Forestry (MNRF). 2023. Make a Map: Natural Heritage Areas. Mapping application. Accessed MAY 2023. https://v.lioapplimtions.irc.gm.on.m/Natural_Heritage/index.html?viewer=Natural_Heritage.Natural_Heritage&lomle=en-CA 2 iNaturalist. 2023. Observations. Accessed MAY 2023. https://v .inaturalist.org/observations 3 Fisheries and Oceans Canada (DFO). 2023. Aquatic Species at Risk Map. Accessed MAY 2023. https://v .dfo-mpo.gcm/species-especes/sara-lep/map-carte/index-eng.html 4 Hidden Valley Draft Characterization Report. Comprehensive Environmental Impact Study for the City of Kitchener (LGL, 2023. Draft) 5 Schedule B Class Environmental Assessment. Upper Hidden Valley Sanitary Pump Station and Forcemain (MTE Consultants Inc., 2022) 6 Stage 2ION LRT from KRchenerto Cambridge Transit Project Assessment Process (WSP, 2021) Matr&Sg1utbnsznc. Page 791 ofl2162 Table 6 Mammal Species Species _L Scientific Name Artioclactyla virginianus Carnivora Canis latrans Name Common Name Deer and Bison White-tailed Deer Carnivores Coyote S -RANK SS S5 Conservation Rank�� ESA ®�® x x x x x Lontra canadensis North American River Otter S5 x Martes americana American Marten S5 x Mephitis mephitis Striped Skunk S5 x x x Mustela erminea Ermine S5 x Mustelafrenoto Long-tailed Weasel S4 x x Mustelanivalis Least Weasel SU x x Neogale vison American Mink S4 x x x Pekania pennanti Fisher S5 x Procyon lotor Northern Raccoon S5 x x x Taxidea taxus American Badger S2 END SC, END SC, END x Ursus americanus American Black Bear S5 x Vulpes vulpes Red Fox S5 x x Chiroptera Eptesicus fuscus Bats Big Brown Bat S4 x Lasionycteris noctivagans Silver -haired Bat S4 x Lasiurus borealis Red Bat S4 x Lasiurus cinereus Myotis leibii Myotis lucifugus Myotisseptentrionalis Perimyotissubflavus Didelphimorphia Didelphis virginiana Hoary Bat Eastern Small -footed Myotis Little Brown Myotis Northern Myotis Tricolored Bat •. Virginia Opossum S4 S2/S3 S4 S3 S3 S4 END END END END END END END END END END x x x x x x Lagomorphia Lepus europaeus Rabbits and Hares European Hare SNA x Sylvilogus floridanus Eastern Cottontail SS x x x Rodentia Castor canadensis Rodents Beaver S5 x x x Glaucomyssabrinus Northern Flying Squirrel S5 x x Glaucomys volons Southern Flying Squirrel S4 x Marmots monax Woodchuck S5 x x x Microtus pennsylvanicus Meadow Vole S5 x x Mus musculus House Mouse SNA x Myodes gapperi Southern Red -backed Vole S5 x Napaeozapus insignis Woodland Jumping Mouse S5 x Ondatrazibethicus Muskrat S5 x x Peromyscusleucopus White-footed Mouse S5 x x Peromyscus maniculatus Deer Mouse S5 x x Sciurus carolinensis Grey Squirrel S5 x x x Synaptomys cooperi Southern Bog Lemming S4 x Tamiasstriatus Eastern Chipmunk S5 x x x Tomiasciurus hudsonicus Red Squirrel S5 x x x Zapus hudsonius Meadow Jumping Mouse SS x Soricomorpha Blarina brevicauda Northern Short -tailed Shrew S5 x x Condylura cristato Star -nosed Mole S5 x Parascalops breweri Hairy -tailed Mole S4 x Sorex cinereus Masked Shrew S5 x Sorex hoyi Pygmy Shrew 54 r x 42 10 24 Sources: 1 Ontario Ministry of Natural Resources and Forestry (MNRF). 2023. Make a Map: Natural Heritage Areas. Mapping application. Accessed MAY 2023. https://www.lioapplications.Irc.gov.on.ca/Natura[_Heritage/index. htmPviewer=Natural_Heritage.Natural_Heritage&locale=en-CA 2 Naturalist. 2023. Ontario Mammals. Accessed MAY 2023. https://www.inaturalist.org/guides/1327?view=card 3 Naturalist. 2023. Observations. Accessed MAY 2023. https://www.inaturalist.org/observations 4 Hidden Valley Draft Characterization Report. Comprehensive Environmental Impact Study for the City of Kitchener (LGL, 2023. Draft) 5 Schedule B Class Environmental Assessment. Upper Hidden Valley Sanitary Pump Station and Forcemain (MTE Consultants Inc., 2022) 6 Stage 2 ION LRT from Kitchener to Cambridge Transit Project Assessment Process (WSP, 2021) Ma&&Sofutionslnc. 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U o y — 3 E " — - E 3 o �, c v E 3, E g 2 3 a c E v E E=_ v ` c o d_ a m g q j — c v i m x 49 39 3 6E so z 6E32 " E a w w 6 a Izw z s E vn - E vE qac qac qac qac E q N 3 c v E E a 3 a 3 a 3 a 3 N au E Ea Ea Ea Ea E v 3 E v 3 E v E y v y v 2 v 2 v E a c E a c E a c E a E EN Er Er Er Er Eq E o E = = = = m E m E m Es Es Es Es z n � _ E E - 3 EE z�`-� a - q G ` - ` - - mer vE E o E E€ E E 3 E E N im c C E olo 2 3 m .o' - -_ E c 3 u r s 3 3-- E E E E E a a c c c E E E E E ill APPENDIX D Species of Conservation Concern (SCC) Habitat Screening Page 809 of 2162 0 a o m o m o o m Ev v v o 3 co o mti E w v- O u w E o v m c m ^ 3 n O 0 v v O v > v = o E ° v -O NID O Q L m O.�0 'O N u0 Y � � a+ o ° c - N =oo m m -o E o 0 0 -�m a QL. -° _ -° r 3 0 v v ,.n v o n x v in o o o -° v m am a m n o v o 9 - v E vv 3 y v E m " .. - v O - o in °u w a u " a n a a m w >a v a o o w " a cNw Q x m o a °- o v v x a v E E o� m@�o oQ o v v O 0 i V m Q O? 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E v c ® w 0 3- E o v - v w v _v i E '° NQ o n m v m v v E o i O z E v o -� E m m E h o E 3 N a p y0 m O! @ p bfl w N x O N m m-0 i+ m O E N T N pp at+ _ " `-° E N o N U I o `° ` a °° v c °_ -M �'i E m o v -p Y n °' m Y _ C o .o c E v m b E °' c Y o f 0 u 'o u E o¢ m u �' o m._ N v v c o o o m N a` 10 15 0 rm+ 30 0 ° O Ol l7 s N m u ro -p o @ w V m u E v u -M muoo T v -p �O m 0, uN -O N 'a+ N .O N N 000 Y L T O j m0 o m� N 3 Q H L E_ E o f C U m m0 ro o 'c E v a° n a Y o o r a° o S r _ 3 a U m 3° - s b c N n @ v ,_. .m. v 3 Y @ a z o w o O z" O m N n O � � T m o a oi O v- `3 3 `o_ v o =`E uo om@mo °pvE V1 m U U 'O m -p 9 O o v O L E L Ol u �4 N m a vt i0 y i+ m u E p f0 O N m N O �y m H H in vNi 3 �i ,y °u "> a a a a a a a a a 3 3 3 o m uvuvvv aas ����������n�nin V o `v s 3 @ 0 = v v c O N i O UW O 'O w G O N Q N O c v v vn, 0 v r E -p m 4000 o o, u v n z E -O v 00 oL t-Tpv U j UL=m p opa EO o — m ;o o°o v > o 2 m m O m o0 v c � N n '^ m -- °3 m v -p s ,v, u v to @ o 2 m m>°m - O Q71 \y mo~_c.o� U� v ns •. c o m T y `° v o v Z m4a 0o` W La cm am v 2 O Q E 0 a V 0 E a t E L a �LLm 0 ry 0 � N tp N o L 0 a a a J m v . % v E Y@ o> u 3 o 0 3 .3 n o13 z 2 @ a a 3 ° 0 a � z w y L oo o 3 3 `p. c u _ N Ol y„ O m E O o N O d O N 0) 'a+ Lp V O Q E Ul m =O v .r i v o- m o c .0 3 c L ,., r -Oo @ o v co @ 3 o v .' v _ o v .• .3 v o o f _ L m a m oo 0 O. 5m > a vv yo va _ 0 y >' >o00Ocva E c@ '3 3 o v ° y a p w v L N L No o c m o 3 o n OE a 0 vYi u Q .. m m y -O - V @ > " -6 v m m O v' > o m m :° m xt ° N ° X vi L 0 0 t >, N N Ul -p $ E _p a L .3 L v -gyp Ol v -p m �O 3 .. o v E° L v o o o o c E o U ° 000 O ° O� o o, E L u• 01 Y L L a c0 T O w o w 6 o J Y 1} L w r 'a+ Op 3w_ `-6 v °L �.�. ai 00N o_o m_`op -Opo o E S v -o %a ° E E o v@ 3 v 3 .n v o w ° @ a a oo a in v 3 v E> $ vi m ° o o v - E 9 N Q p Q o N a 2 O O a E p 3 v 3 v® m a Q E ac 0 v 3 v o 5 o m a V c a z i O V y o ry ia 0 3 o o i vv a L 0 v �v z � Z � z C yE L„ Z � m " E °m E -o v 01 ° 1 n ` > -p wa V L S r O _ V a ° °' L 'C Q O N O o a -`c 01 O 00 o 3 E�E '^ o $ o a `o f v oE o E wia r o° o u o c a v c 3 a E a .. v v U 0 L 0 3 v 2 �- v �' .. v v V N '> L 0o u o z -m o ._ 3 p- u u oo o G o c v.�3 �=mY � ?�'a� � }T c m av' vcl �=cY 0- v v p @ r z 3 L c @ 0- v E v n c o E r z .Y, .m. a z p o a > s= E z z- `o > w v N f m a. ac p oo a °u ¢ L.. m t i ovo E z z ii `o v E o n o Lm u v - 8 N `3 a s Q O p p w �Oa c o W v v o o u v v „ 3 -mu o v v - v 3 Va �w Uw Q�n u N a 0o0 E p o u` i p v E u 0 m o o 00 p a v O oo v o o ay. 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CO O y 7 vi 3 v$ c E a v n' C c .v c +_T j = w T f6 L .O C U bD fY6 f6 N E_° a 6 j O c a, (U O m U C L p E c a O U N N o@ Q C C o 3 0 O O a, E u ' > fa E Y Y E I> O K N c N -0 0 ^° O Y a, L— c 3 vd'i N p O H YO 3 w o3 E v 3 v=on T O. c c a m = u N e '.n M fa fa CIO t= -0 fa y O O_ fa on T m= C O c c N V on - c X m N '^ on u s c c O m c o a '6 N Q Y O Q, a O O 7 V bn 7 .0 �n x V 7 N > C N N i Y N f6 CL C •3 = = N O � 4, 00 N Y 0 f6 LL c °° o ('W^ in° (U c-4- v = +a �n w N N m N C— `° :3a C _6 76 N u o :03a Y E Y c v E f6 c > on nn 0 ° 3 Q a, on O v c c Q E E c Y O O O N L 7 @ f6 0 35< a L '6N (>u-(uc c 3 L 3 N -O O- C c Y C C m C O C vo E0 o cc O c T (U 3 - j (U _ C YO N Y o fu Y� TLO s u c u fa o(U o '^ (U u v v CCL O I v u> y Ov -0 v u a L O a, O s Oc N LO Y •� Q. O' a X >, •� C O' O fC O f6 N Y Y Y N • E V1 = �C6 C = 4, >� __ E >, f6 o v o 3 �, a, or L v Y i 3 o c c°i a > > Y L C c v v ° _ a s a 0 Y fl. CL L x L Y 4, � Q Q/ a, L = N Y 3 v v v N N CL E O v T v Q, Y C w c v T N 3 Q, D O = Q, f6 � L L � c o C > C i T p O c 0 O = T T E O N O N O 6 bn -O C N U N N -0 O N CL v> E -O N 0 o a M v o v E E 72 a O N = C T , OU i N T O N O N N 3 N U O C N O N N = fC L L 6 Q Y Y = N f6 3 � f6 H a, E O 7 - - f6 = ` O 7 O = C � N - � y 3 > N U O N N Y m Co Cc: c O � •= O Q 4 6 N � v E � x 3 °a E >M v N > O n C a C � O — � Y c O � a N v1 >, v = (U :3 N '> O v O � � m C >• 7 bn J N O c E v =a N OT E N v O w � v O L Q 11:11 24 _ - �%01 r _ W 2 C4 y. 4A Z- 3 3 7 k + 2 C4 y. 4A Z- 3 3 7 � µ © y I- CL c C: E O U C v 3 V) C: X Q a) Y a) L E n O > Q cr E 06W yZ 3 m L 3 bD -o 2 - O N Y K c T t N 3 c C N L a m U K N Q (u T > 3 Y O C y m 4 m m O. 01 oE o � v L c c E O. _O a) N a v 3 D 0 c c 7 bD a VD A) O a bD v a a c a, O 15 v a 0 a O N a, L 3 � E -- N M 4 V1 N M m vi O Q O a a) U_ L a) a a) E O 3 m c m v m N d, vi a) U_ Y L C a O N > > U c c xX O N V m � a) v E T O N O a N > O N O C' a = N 2 O O t N 0 2 0 _0W O O L bA N 3 mmm O O L N O N 3 U bD C zc on c i O -2 Q m a Q. bO 4H E a) N c .n O E N L t w Q v 3 s o > z v T C m > a m v N a v m m c as C O > m :6 O U O UO a a m a c o c c c c E a v O bO + Q mc Y QLt a 3 o E C c E O. a) m m O N on v a) Y > D v O �6 Y c m � 0 � c a Y(U :e c 0 E o. Q O > a s T E L m Y Q O O m 6 O c c w U = a a -i N M 4 u7 l6 a) a) M 7tE a E o CL o m U — N M C O O Q• o _T -O C O 00 a) U Y � N � 00 � T Q CL L '6 x as f6 (U c i f6 c Y O N c U C 6 x X f6 a) N � Y 0 O N h0 U > c K O as L p U Y C N C 6 a/ a) E OO t on -O C t6 f6 � 3 L O (U U U � U 2O 3 c , c = O Y c -a o Y 8 O C U a) t a) E y bO a) U a) m +L = c C o a) C -M C O m U U C O C � N C O U � Y E a)O a) i L U -C - T c �N a C f67 > C on C O a Y a) J f6 0 a v w O m O N O C L v 6 U J v+ N :3 (u C ppO v _T = o U N N L (U E— N •X 6 E 0 O (o U v Q D v -a CL U N7 � v E _ O > o bn U 3 C NY Y a) C a3 y U_ E 6N C > 'O bCa C :2 n d v D c 6 O L N 3 C E x Y a i U O y C m C L O U w O (U v - a H O -1 N O zi, a) 0 +L+ a) j Q � as — U fl - N v 0 v a) O C- OO. . N a) X� Y 0 nCn o 6 = b0 v K> n () a) _C 3 3 Y a) o C T y N •3 -1 N 0 0 CL LL's m sm J � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N N N C p) EJ N C 0< c1 N ` N � N m p .P1 r W po N .p U o N C C N p N N CD �,} o NC N N c1 u C Q} i mEamy`ua.G�o � E x E u m V E E _ N N U1lV Q o E N N [6 c x p 0 N N CD 7 4 — N 6 a� �°� u �a t E tE v .� •L' L N P- - 2 7 y O E ai S Z3 C p -❑ 7 — E N �_ 6 _ C (� — E ie [[5 LL u V p p 0.�+ p - C u L rn v 2 V] D p LL m C r v - �oE - W v t8 _ - C 0u �) L t6 t C E 05 3 p C p � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N N N C p) EJ N C 0< c1 N ` N � N m p .P1 r W po N .p U o N N N a C C E o �,} o NC N N c1 u C Q} i mEamy`ua.G�o � E x E u m V E E _ � � N C O C CLp C ❑ Q 4-P N [6 c x p 0 N N CD 7 4 C a� �°� u LLJ t N 0 o .� •L' P !6 of N P- y m[� C 0 LL C ai � � N C Z3 C p -❑ 7 — C L D P H p u f2 2 ie N -E 2 u N p F — i r v - �oE - N E p o E -pU] z v t8 _ - C 0u �) L t6 t C E 05 3 p C p I� T;C �Q q1�� LL Cil � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N N L N � O C p) EJ N C 0< c1 N ` N � N m p .P1 r W po N .p , O=Dco°'Evo Em � N N N a C C E o �,} N p rcn i mEamy`ua.G�o � E CP C1 0 0 J � � N C O l=E V N u L— L p c1 Q Q 4-P C' E p 0 N N CD 7 4 C N a r"ii W N E LLJ EM I o � N W46 � � o � � N C =i u N t� N ?� N C L �_ P H p u f2 2 ie C C C 5 � � -E 2 r r v - �oE - 0 v t8 - 0u �) L t6 t N [[5 T;C N C L1 p C .0 CC�p mE- 48 C a% lCV CO p C u E .N E L E ��J li p n E N n N E E x E x 3 G C LL O � _ G71 C S D❑ G u E N M " ❑ N}O N p LL N [�4 5 � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N L N C d]- N L N � O C p) EJ N C 0< c1 N ` N � N m p .P1 r W po N .p , O=Dco°'Evo Em � � LN a C C E o �,} p pyp i mEamy`ua.G�o � E CP C1 0 N O '0_ l=E V N u L— L p c1 Q Q 4-P C' E N C N a r"ii W N E LLJ EM [C6 o � N W46 � � o � � N C =i u N t� N ?� N N L �_ P H p u f2 2 ca ❑ N a C [6 -O C N} d N p N C6 E N C t6 O N [6 L Q 9 LL C�1 N N E t8 - o w t6 t N [[5 .� p t o m L1 E L2] Lf] r L CC�p mE- N E 0 N m 'fi N N A m [o L V1 z3� y a [o L N N G71 C D❑ G u E N M " ❑ N}O N p LL N [�4 5 Q] o � 7+ 0 C o � C .0 E u E E N 3 5 C+i CI) a O C [C6 n E m E E E E x x 6 :a To S ME � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N L N C d]- E C p) EJ N C 0< c1 N ` N � N m p .P1 r W po N .p , O=Dco°'Evo Em � � LN a C C E o �,} p pyp i mEamy`ua.G�o � E CP C1 0 N O '0_ l=E V N u L— L p c1 Q Q N 0 L_[6 N N C N N N E p N C' E _p [6 ❑ E C N a r"ii W N E LLJ �OL Ou L>LL [C6 � � Ui C p � E � � � ❑ � � � N C =i u N t� N ?� N N o �_ P H p u f2 2 ca ❑ N a C [6 -O C N} d N p N C6 E N C t6 O N [6 L Q 9 LL C�1 N N 6 o p L ., C [ C] Q1 O In N - O N C o t6 t N [[5 .� p t o m � E- E C o E a CC�p mE- C) -a Yo N o u M eVi o LL z3� y V0..0 aiCL p D❑ G u E N M " ❑ N 9] p LL N [�4 _-Q p_ C.m CL Q% o [6 N 9 _ol N _ [C ocD E o C .0 u LI'1 U V. s N 3 5 C+i CI) a O C [C6 � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N L N C d]- E C p) EJ N C 0< c1 N ` N � N m p .P1 r W po N .p , O=Dco°'Evo Em � N L1 � Q] Y ❑ C u� C E N �,} C N p 0 O m p �] N p c} V L V L Ul 47 C i i mEamy`ua.G�o � E E[Ci N O 0 U)N U [� W C] N o t1 y:N l=E V N u L— L p c1 Q Q N 0 L_[6 N N C N N N E p N C' E _p [6 ❑ E C N a r"ii W N E LLJ �OL Ou L>LL m o 0 u E �� a p Q7 a o�S ad m/u CAp p.m, 0 -[Ci E C � N =i u N t� N ?� N En V p C T a p © P H p u f2 2 ca W N N � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . CL V � [4 a' v C p N L N C d]- E p O — y t� E p .P1 r W po N .p N N [6 C N u N D N N C G No C om nE pw n u ' r N aL 0 U)N U [� W C] N o t1 y:N .=1.x L E V T p N ¢ cu N N EO—N Zy E C' E {w C VNiLLQ aL �OL Ou L>LL m o 0 u E �� a p Q7 C v C N ad m/u CAp p.m, 0 -[Ci E C � N =i u N t� N ?� N En V p C T a p © P H p u f2 2 W N N N I N U C u m m a N N T `o � N L1 p t[SS�55 •�V1 2 vsN C o � W ,�-, � .. N O1❑ E [4 1 ❑ .*_' NLD f - [o 0 [a IS y _ %®O Vi _p N _ - = u p'CN u 2 Y m 'u,umQ LL 0 -0 p1 —• � f6 � C s} C o 3 s C l d I C N ren y o u ea ,o }o N coLL U 0 E! N _ _ O V ' U O f6 p L E E w p C v L N m } Q] N � � .z'.i7E � o Lu E O p1 v 6 E C [6 0 M N . 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