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HomeMy WebLinkAboutINS-2022-102 - Environmental Assessment Addendum to the Integrated Stormwater Management Master PlanStaffeeport IST` � Ni,R Infrastructure Services Department www.kitchener.ca REPORT TO: Community and Infrastructure Services Committee DATE OF MEETING: March 7, 2022 SUBMITTED BY: Bu Lam, Director, Sanitary and Stormwater Utilities, 519-741-2600 ext. 4212 PREPARED BY: Nick Gollan, Manager, Sanitary and Stormwater Utilities, 519-741-2600 Ext. 7422 WARD(S) INVOLVED: Ward 4 DATE OF REPORT: February 7, 2022 REPORT NO.: INS -2022-102 SUBJECT: Environmental Assessment Addendum to the Integrated Stormwater Management Master Plan Project File RECOMMENDATION: That Staff be directed to post the Revised Notice of Study Completion Addendum to the Integrated Stormwater Management Master Plan Schedule `B' Environmental Assessment Project File for the mandatory 30 -day review period. REPORT HIGHLIGHTS: • Per the Integrated Stormwater Management Master Plan, "Second Priority" erosion sites are to be considered for integration with other City projects as they arise. • "Second Priority" erosion sites have been identified to be included in the detailed design and construction of a section of Schneider Creek between Pioneer Drive and the confluence of Schneider Creek with the Grand River. • An Environmental Assessment addendum must be published to comply with the Environmental Assessment Act, R.S.O. 1990. • This report supports Environmental Leadership. BACKGROUND: On July 10, 2016, the City of Kitchener formally completed the Integrated Stormwater Management Master Plan (ISWM-MP) Schedule `B' Municipal Class Environmental Assessment Report, including the mandatory 30 -day public review period. The ISWM-MP included the prioritization and detailed design of projects, thereby removing the need to complete project - specific Environmental Assessments. These projects are pre -approved to move directly into the implementation phase (final design and construction) of the Municipal Class Environmental Assessment Planning and Design Process. City Staff is preparing to retain professional services for the creek restoration design for reach SC -213, Schneider Creek at Old Carriage Road; however, there are "secondary" priority erosions sites that can be included in the scope of work identified, not pre -approved in the ISWM-MP. *** This information is available in accessible formats upon request. *** Please call 519-741-2345 or TTY 1-866-969-9994 for assistance. Page 8 of 132 Stream erosion assessments were completed through the ISWM-MP to document the health of Kitchener's watercourses; an inventory of erosions sites and risks was developed. The inventory was then used to identify erosion site and restoration reach opportunities, i.e. projects. The erosion inventory classified sites as either "primary" or "secondary" priority based on their level - of -risk and environmental opportunity. Erosion sites given a "primary" priority were provided with a preferred alternative solution; they could be implemented immediately following the completion of the ISWM-MP. The "secondary" priority sites were not provided with a preferred solution. The direction provided in the ISWM-MP was that these "secondary" priority sites be considered for integration with other City projects as they arose and that monitoring be completed on these sites to confirm that no change in condition had been observed. REPORT: Per the requirements of the ISWM-MP, City Staff has monitored the erosion sites for change in condition. In 2019, City staff completed creek walks through Lower Schneider Creek from Schneider Creek at Homer Watson Blvd (near the Ken Seiling Waterloo Region Museum) to the mouth of Schneider Creek (confluence with the Grand River); a change in conditions was noted at SC -1A — Schneider Creek at Grand River confluence (Erosion Site ES -40), SC -113 — Schneider Creek upstream of Old Mill Road (Erosion Site ES -14), SC -313 — Schneider Creek in the Southwest Optimists Sports Fields (Erosion Sites ES -17 and ES -18). These erosion sites are near reach SC -213, Schneider Creek at Old Carriage Road, a high priority creek restoration scheduled for detailed design in 2023. Figure 1 below shows the approximate study limit. �C9GP %' �- DOON VILLAGE RD ojLJ, e p tJ 1:JII o w . Figure 1: Approximate Study Limit To include the "secondary" priority sites and satisfy the Municipal Class Environmental Assessment planning and design process, an addendum to the ISWMP-MP must be filed through a "Revised Notice of Completion". The revised notice of completion must be made available to the public and agencies for a 30 -day review period. Staff are prepared to file an Addendum to the ISWM-MP to include the "secondary" priority sites before scoping and hiring Page 9 of 132 professional services for the detailed design of reach SC -213. A report has been prepared by Aquafor Beech Ltd. titled "Schneider Creek — EA Addendum to ISWM-MP Environmental Assessment Project File" to present the alternative solutions and preferred design for the "secondary" priority sites. STRATEGIC PLAN ALIGNMENT: This report supports Environmental Leadership. FINANCIAL IMPLICATIONS: Capital Budget — The recommendation has no impact on the Capital Budget. Operating Budget — The recommendation has no impact on the Operating Budget. COMMUNITY ENGAGEMENT: INFORM — The EA Addendum will be posted to the City's website for a 30 -day public review period if the recommendation of this report is ratified by Council. The completed addendum report titled, "Schneider Creek - EA Addendum to ISWM-MP Environmental Assessment Project File" is located here and a hardcopy is available for review at the Office of the Mayor and Council. If you require this document in an accessible format, please contact Nick Gollan, nick.gollan(a-)kitchener.ca, 519-742-2600 x7422. Following Council's approval of INS -2022-102, staff will post the Notice of Completion per the requirements of the Environmental Assessment Act, R.S.O 1990. PREVIOUS REPORTS/AUTHORITIES: • INS -16-080 Implementation Plan — Integrated Stormwater Management Master Plan ATTACHMENT: Schneider Creek — EA Addendum to ISWM-MP Environmental Assessment Project File APPROVED BY: Denise McGoldrick, General Manager INS Page 10 of 132 Prepared for: City of Kitchener Attention: Samantha Brickman, CET, Design & Construction Project Manager, Utility Planning and Programs 131 Goodrich Dr., Kitchener, Ontario Schneider Creek - EA Addendum to ISWM-MP Environmental Assessment Project File A report submitted by: =- Aquafor Beech Ltd. August 11th, 2020 2600 Skymark Avenue Building 6, Unit 202 Mississauga, ON L4W 5B2 T. 905.629.0099 Aquafor Beech Reference: 66685 Schneider Creek August 11th, 2020 City of Kitchener TABLE OF CONTENTS 1. Introduction......................................................................................... 1 2. Existing Conditions................................................................................ 1 2.1 Primary Site - Schneider Creek at Old Carriage (SC -2B -C) ...................... 2 2.2 Additional Secondary Sites................................................................. 2 2.2.1 Schneider Creek at Grand River Confluence (SC -IA) ...................... 2 2.2.2 Schneider Creek Upstream of Old Mill Road (SC -IB) ....................... 2 2.2.3 Schneider Creek in the Southwest Optimists Sports Fields (SC -3B)... 3 3 Description of Restoration Alternatives...................................................... 3 3.1 Preliminary Alternative 1 - Do Nothing ................................................. 4 3.2 Preliminary Alternative 2 - Local Works ................................................ 4 3.3 Preliminary Alternative 3 - Reach Based Works ..................................... 4 3.4 Preliminary Alternative 4 - Removal of Risk .......................................... 5 4 Evaluation of Alternatives....................................................................... 6 4.1 Description of Evaluation Criteria........................................................ 6 4.2 Evaluation and Selection of Preferred Alternatives .................................. 7 4.2.1 Schneider Creek at Grand River Confluence (SC -IA) ...................... 7 4.2.2 Schneider Creek upstream of Old Mill Road (SC -IB) ....................... 9 4.2.3 Schneider Creek in the Southwest Optimists Sports Fields (SC -3B). 10 5 Summary........................................................................................... 12 List of Appendices Appendix A ISWM-MP EA Erosion Site Figures and Concept Drawings for Primary Erosion Site SC -2A -C Appendix B March 26th, 2020 Existing Conditions Report with Photographs (Presented to City Staff May 4th, 2020) Appendix C 2020 Existing Conditions Drawings for Addendum Reaches (SC -1A, SC -1B, SC -3B) Appendix D Detailed Evaluation of Alternative Results Appendix E Concept Design Drawings for Addendum Reaches (SC -1A, SC -1B, SC -3B) Aquafor Beech Limited 66685 i Page 12 of 132 Schneider Creek August 11th, 2020 City of Kitchener 1. Introduction The current study is being completed as an addendum to the 2016 City of Kitchener Integrated Stormwater Management Master Plan (ISWP-MP). The City has identified a change in conditions for three (3) additional reaches (4 erosion sites) located near to a high priority site for Schneider Creek at Old Carriage Road (SC -2B). As stated in the ISWM-MP, amendments to the projects identified as part of the preferred alternatives can be made using the addendum procedures outlined in the Municipal Engineers Association Municipal Class Environmental Assessment Act (October 2000, as amended in 2007 & 2011) document and shall be posted for the required 30 day review period. As such, this addendum study to the ISWM-MP is to update the preferred alternative for Schneider Creek at Old Carriage Road (SC -2B) to permit the simultaneous advancement of three (3) additional smaller projects located adjacent to the immediate work area, specifically: • SC -1A - Schneider Creek at Grand River confluence (bank erosion around decommissioned forced sanitary sewer manhole, ES -40) • SC -1113 - Schneider Creek upstream of Old Mill Road (bank erosion and trail management risks, ES -14) • SC -3113 - Schneider Creek in the Southwest Optimists Sports Fields (bank erosion and trail management risk at two locations): o SC -3113-A - Schneider Creek at Pioneer Drive (ES -17) o SC -3113-113 - Schneider Creek at Homer Watson Boulevard (ES -18) As presented in Appendix A, Schneider Creek at Old Carriage Road (SC -2B -C) was identified in the ISWM-MP as a primary opportunity site located in reaches SC -2B to 3A (labelled SC -2B -3A). The additional reaches assessed in this addendum study were identified as secondary sites. The preferred alternative for site SC -2B -C as recommended in 2016 is also provided in Appendix A for reference. The purpose of this report is to summarize an assessment of existing conditions for these erosion sites and to provide the evaluation of alternative solutions for the three additional reaches. 2. Existing Conditions Existing conditions for the addendum study area were assessed March 26th, 2020 for comparison with the 2015 conditions as presented in the 2016 ISWM-MP. The results of the current assessment, including photographs, were discussed with City staff in a meeting on May 4th, 2020 as documented in Appendix B. A short description for the existing conditions in each reach is provide below, starting with the primary site in Reach SC -2B and followed by the three (3) additional reaches. Aquafor Beech Limited 66685 1 Page 13 of 132 Schneider Creek August 11th, 2020 City of Kitchener 2.1 Primary Site — Schneider Creek at Old Carriage (SC -2B -C) The primary site recommended for Reach Based Works within the ISWM-MP was initially identified by a series of seven (7) local erosion issues documented as erosion sites 15a -f and 16. These erosion issues included risks to private property due to bank erosion and channel instability, as well as deterioration of older erosion control structures such as gabion baskets, cribwalls, boulders, armourstone, rip - rap, and interlocking concrete bricks. The existing conditions for Reach SC -2B were similar in 2020 as compared to 2015, but with some evidence of continued bank erosion (e.g., ES -15 c and e) and further deterioration of erosion control structures. Specifically, additional undercutting and slumping was observed for the cribwalls at ES -15c and the gabion baskets and ES - 15d and ES -16. The most significant new issue noted was floodplain scour along the gravel trail immediately upstream of ES -15d (see pages 5 and 6 in Appendix B). 2.2 Additional Secondary Sites As secondary sites identified within the ISWM-MP, all three additional reaches were previously recommended for monitoring. The March 2020 assessment of existing conditions for each of the four secondary erosion sites is summarized below with photos presented in Appendix B and drawings presented in Appendix C. L'�PO'irieiGer �.teeK aC W di'1e Aver LUM'WetiCe (SC- ,J Site ES -40 within Reach SC -1A was identified for monitoring in 2015 due to a manhole being exposed along the bank of Schneider Creek immediately upstream of the Grand River confluence (see Figure 1-A in Appendix C). Angular rock was previously placed along the bank around the manhole. Inspection of the site in 2020 confirmed that the bank has continued to scour around this decommissioned, forced sanitary sewer manhole, including movement of the angular rock along the bank. However, other than the continued bank erosion immediately around the manhole, no other erosion or scour issues were noted to be a problem within the confluence area of Schneider Creek and the Grand River. .2.2 Schneider Creek Upstream of Old Mill Road (SC -1B) Site ES -14 within Reach SC -1B was identified for monitoring in 2015 due to active bank erosion into the adjacent gravel trail (see Figure 1-113 in Appendix C). Following the 2015 assessment the trail was realigned approximately 5 metres setback from the eroding channel bank. Evidence of continued bank erosion in Schneider Creek at this site was confirmed in 2020 (which is a natural process that may be accelerated by additional runoff from upstream urban land uses). Aquafor Beech Limited 66685 2 Page 14 of 132 Schneider Creek August 11th, 2020 City of Kitchener Ongoing future risks to the trail system are expected as the bank continues to erode. Although the trail was recently realigned, there was a upstream location within the site with a buffer of less than 2 m between the channel and the trail. Schneirf - r -eek in the SouthvtfAicf- Optimfct� ';nn► -t. Ffe/ds (SC -3B) Sites ES -17 and ES -18 within Reach SC -3B were identified for monitoring in 2015 due to bank erosion adjacent to the gravel trail within the Southwest Optimists Sports Fields (which has since been upgraded to a group four new baseball diamonds). Evidence of continued erosion at both sites was confirmed in 2020 (see Figure 1-C and 1-D in Appendix C). Continued erosion at the downstream location ES -17 (Schneider Creek at Pioneer Drive, SC -3B -A) has resulted in the local decommissioning of the trail, and future risks to the adjacent parking lot remain. Evidence of continued erosion at the upstream location ES -18 (Schneider Creek at Homer Watson Boulevard, SC -3B -B) was also observed in 2020 due to the oversteepened and unvegetated slope, however the trail has been realigned since 2015 with the upgraded sports fields. New drainage conditions were also noted for the upstream site from the new sports fields, with storm water designed to discharge (and thus infiltrate) into top of the already unstable and eroding slope. Evidence of the additional infiltration was observed within the local soil moisture conditions of the embankment aligned with the storm water discharge point. 3 Description of Restoration Alternatives Following the EA procedure as outlined in the ISWM-MP, each of the primary erosion sites was evaluated for different preliminary restoration alternatives. For this report, the same four (4) preliminary alternatives were used to evaluate the secondary erosion sites on Schneider Creek reaches SC -1A, SC -1B, and SC -3B: • Preliminary Alternative 1 - Do Nothing • Preliminary Alternative 2 - Local Works • Preliminary Alternative 3 - Reach Based Works • Preliminary Alternative 4 - Removal of Risk Each of the alternatives was evaluated and ranked using a list of relevant environmental, social, economic, and technical criteria, considering how the project will affect the environment and the surrounding community. The following subsections provide general descriptions for each of these preliminary alternatives, followed by the evaluation of alternatives for each of the addendum reaches. Note the following alternative descriptions have been shortened and full descriptions can be found in the ISWM-MP report. Aquafor Beech Limited 66685 3 Page 15 of 132 Schneider Creek August 11th, 2020 City of Kitchener 3.1 Preliminary Alternative 1 — Do Nothing The Do Nothing option is a mandatory concept that must be considered in the Class EA process, as it helps to justify the need to undertake remedial flood or erosion control projects. It forms the basis of comparison against all other alternatives to determine whether the solutions provide better outcomes than just leaving the sites alone, by identifying the existing and long-term risks associated with the current conditions. The environmental effects of a Do Nothing approach relate to the potential long- term effects of erosion on the terrestrial, cultural, aquatic and economic environments, as well as engineering components. Ultimately, all the existing hazard sites associated with noted erosion sites (e.g., eroding stream banks, deterioration of previous treatments, or degradation of habitat conditions) would remain. 3.2 Preliminary Alternative 2 — Local Works Local Works would involve undertaking stream restoration works at strategic locations in order to limit the impact of existing erosion. Local works would reduce the level of risk by applying local bank or slope stabilization treatments using either hardened (engineered) type treatments, or more natural (vegetation and biotechnical engineered) type treatments. A key consideration for undertaking selective local works is the understanding that the observed instability and risks are locally focused within a reach, and that the decision to apply local treatments to address the observed instability is not anticipated to initiate instability at other locations, thus resulting in increased erosion risk elsewhere within the reach. The intent of these works would be to protect the adjacent features at risk (i.e., residential properties and infrastructure), both now, and in the future by anticipating channel activity that may occur in the vicinity of the at -risk areas. 3.3 Preliminary Alternative 3 — Reach Based Works Reach based channel restoration would involve a combination of Natural Channel Design (NCD) techniques and Geomorphic Referenced River Engineering (GRRE) generally referred to as a hybrid type design. Hybrid designs are most often found where project constraints dictate that the channel cannot be allowed to evolve or migrate naturally, or if the urbanization of the upstream watershed has created a regime that cannot be maintained under natural conditions. This alternative would ultimately be selected for a reach if it is determined that the "Do Nothing" or "Local Works" would not address, or in fact would exacerbate, Aquafor Beech Limited 66685 4 Page 16 of 132 Schneider Creek August 11th, 2020 City of Kitchener erosion risk at its current location or transfer those effects of erosion up and/or downstream within the reach. For these sites, it is understood that there is systematic instability within the watercourse requiring a larger -scale and systematic approach to address the risk. Reach based works would include restoration of the stream to a naturalized form, maintaining a fixed alignment where property and/or infrastructure constraints dictate, and grade control where necessary to prevent channel down cutting and to reintroduce hydraulic floodplain access. Moreover, this alternative would involve complete remedial works throughout the length of the reach(es) containing the erosion site(s), recreating the channel bed and banks using a combination of Natural Channel Design techniques, as well as more traditional river engineering and bioengineering methods. During construction, this option would involve a high level of disruption to property owners, local residents, and habitat (including existing vegetation). Once completed however, it would provide improved long-term conditions in terms of the natural function and processes of the watercourse. All disrupted areas would be restored within the site, including appropriate plantings and seed mixes designed to provide stability and sustainability, with a long-term management plan to restore the riparian and terrestrial habitat functions. 3.4 Preliminary Alternative 4 — Removal of Risk The removal of risk alternative would involve the realignment of risk (i.e., infrastructure) away from the channel. This alternative addresses the reoccurring issues associated with infrastructure and watercourse interactions, and looks at possible approaches of removing the interaction to provide the creek with sufficient space to naturally adjust and migrate without posing risks to municipal infrastructure or private property. Many of the Removal of Risk alternatives will also include channel restoration works (be it GRRE or NCD) to address the existing erosional issues identified, or to restore areas where excavation works will be required. Removal of risk works could include such works as realignment of sections of sewers away from the channel, removal of abandoned infrastructure, or purchasing of private property to provide a larger meander belt and erodible corridor for the channel to adjust. This alternative could include minor or major infrastructure changes, but will typically include localized remedial works within the channel (i.e., recreating the channel bed and banks using a combination of natural channel design techniques, as well as more traditional engineering and bioengineering methods). During construction, this option would have varying levels of disruption to property owners, local residents, and habitat (including existing vegetation). This will Aquafor Beech Limited 66685 5 Page 17 of 132 Schneider Creek August 11th, 2020 City of Kitchener depend on the scope of the works associated with the infrastructure realignment. However, once complete, not only will the existing erosional issues be addressed, but also the threat of future erosion risks will be greatly reduced. All disrupted areas would be restored within the site, including appropriate plantings and seed mixes designed to provide stability and sustainability, with a long-term management plan to restore the riparian and terrestrial habitat functions. 4 Evaluation of Alternatives Evaluation of alternatives involves establishing alternative solutions based on the study objectives, technical considerations and relevant evaluation criteria. The evaluation criteria include the four main categories of Physical/Natural Environment, Social/Cultural, Economic, and Technical/Engineering. 4.1 Description of Evaluation Criteria The evaluation criteria considered in assessing each alternative solution are shown in Table 1 below. A score was established through a multidisciplinary evaluation process for each alternative design, for each criterion listed. The score for each alternative solution ranged from 1 to 10. A score of 1 indicates that the alternative solution scored low in relation to the criteria. Alternatively, a score of 10 indicated that the alternative solution scored high in satisfying the respective design criteria. The overall preferred design was then based on an aggregate score from all the design criteria, normalized such that each category represented 25% of the total possible score. The intent was to identify the preferred retrofit design options. Further details of the evaluation process, including methods used in assigning scores for each criterion, can be found in the 2016 ISWM-MP report. Aquafor Beech Limited 66685 6 Page 18 of 132 Schneider Creek August 11th, 2020 City of Kitchener Table 1: Criteria used in Evaluation Process for selecting the Preferred Alternatives Environmental Criteria Assessment Categories Physical/Natural . Potential Aquatic Habitat Benefit (Water Temperature) Environment • Potential Aquatic Habitat Benefit (Fish Passage) Potential to Reduce Erosion of Public Lands Potential to Reduce Erosion of Private Lands Potential to Reduce Stream bank and Stream bed Erosion Potential to Enhance Groundwater Regime Potential to Reduce Flooding Potential to Improve Terrestrial Habitat Integration with Existing Infrastructure Integration with Existing Environment Social/Cultural . Aesthetic / Recreation • Compatibility with Adjacent Land Use • Community Disruption Public Health and Safety Economic • Construction Costs • Operation Maintenance Infrastructure Protection Technical/Engineering . Ease of Implementation Agency Acceptance Policy/Bylaw Requirements Technical Feasibility 4.2 Evaluation and Selection of Preferred Alternatives The above evaluation process was completed for each of the three addendum reaches, containing the four secondary erosion site opportunities. The following includes brief descriptions of the alternatives for each of the sites, as well as the selected preferred alternatives as summarized below in Table 2 and detailed in Appendix D. Concept designs are provided in Appendix E. 4.2.1 Schneider Creek at Grand River Confluence (SC -IA) Do Nothing (SC -1A) The Do Nothing alternative for the erosion site in Reach SC -1A would be to allow bank erosion and scour around the manhole to continue, increasing the risk of an uncontrolled breakage during a flooding event. Leaving the manhole in the channel would continue to put additional hydraulic stress along the bank, risking failure of the decommissioned manhole structure and forcemain sewer pipe, as well as possibly putting the new forcemain sewer and adjacent manholes at risk. Aquafor Beech Limited 66685 7 Page 19 of 132 Schneider Creek August 11th, 2020 City of Kitchener Local Works (SC -1A) Under the Local Works alternative for Reach SC -1A, the former rip -rap or boulder bank protection would be replaced and repaired around the decommissioned manhole, continuing upstream and downstream about 15 metres. The total length of the bank protection works would be about 30 metres. This alternative would not include removal of the manhole structure from the channel. Reach Based Works (SC -1A) The Reach Based Works alternative for Reach SC -1A would involve channel restoration and stabilization works for about 120 m of Schneider Creek from Old Mill Road down to the confluence with the Grand River. A retrofit solution for the hydraulic drop and downstream scour conditions for the concrete drop structure under Old Mill Road would also be considered in the design. Some minor channel realignment, bioengineering of the banks, and cobble- boulder- riffle structures on the bed would be proposed to increase overall channel stability in the reach and lower the risk to the decommissioned and active forcemain sewers within the valley. Removal or Risk (SC -1A) The Removal of Risk alternative for Reach SC -1A recommends removing the decommissioned manhole structure from the channel, including: 1. Remove and dispose existing maintenance hole riser section to below elevation of approx. 274.50 - 275.00 in addition to the removal of existing gate valve stem sections. 2. Abandon remaining riser sections and gate valve in place. Abandoned risers sections shall be completed per City/OPS Standards. Manhole removal works would also include about 30 metres of bank restoration using bioengineering approaches of regrading and vegetating the banks with topsoil and native plantings, as well as native -sized cobble stone at the bank toe. Future risks to the old forcemain pipe associated with the removed manhole are considered to be low based on the relative elevations of downstream scour pool and riffle crest in the Grand River (see Figure 1-A in Appendix C). Selected Preferred Alternative (SC -1A) Removal of Risk was the selected preferred alternative for the Reach SC -1A erosion site. Evaluation results are summarized in Table 2 and detailed in Appendix D. The conceptual design is presented in Figure 2-A of Appendix E. Aquafor Beech Limited 66685 8 Page 20 of 132 Schneider Creek August 11th, 2020 City of Kitchener �cnneider Creek upstream of O/d Mil/ Road (SC -1B) Do Nothing (SC -1B) The Do Nothing alternative for the erosion site in Reach SC -1B would be to allow bank erosion to continue toward the gravel trail, eventually allowing the channel to come into contact with the trail again. Although the trail was recently realigned, there is location at the upstream end of the site where the buffer is less than 2 m between the channel and the trail. The erosion rate would continue to be monitored by the City and the trail would either need to be successively setback from the channel bank by 5-10 metres every 10-20 years (assuming a 0.5 m/yr erosion rate) or the trail could be realigned a greater distance from the channel to be outside a 50 - 100 year erosion hazard limit (i.e., future consideration of the Removal of Risk alternative). Local Works (SC -1B) Under the Local Works alternative for Reach SC -1B, erosion protection measures would be proposed for the eroding bank along about 150 metres, likely including some combination of stone -toe protection (boulder or rip -rap toe, rock deflectors) and bioengineering using native plantings and/or wood structures (e.g., cribwalls, log deflectors). More substantive armourstone retaining wall structures could also be considered. The life expectance for softer stone -toe and bioengineering measures that are more environmentally sensitive would be about 10-20 years. Harder amourstone retaining wall structures might last 20-40 years depending on the design factor of safety and City maintenance schedule with respect to the horizontal and vertical tie-ins of the wall into the bank and bed of the channel. Reach Based Works (SC -1B) The Reach Based Works alternative for Reach SC -1B would involve channel restoration and stabilization works for at least 350 metres of Schneider Creek upstream of Old Mill Road, and possibly including a total of 500 metres to address additional upstream erosion along the -900-metre-long reach. A retrofit solution for the hydraulic drop and downstream scour conditions for the concrete drop structure under Old Mill Road would also be considered in the design. Channel realignment, bioengineering of the banks, and cobble- boulder- riffle structures on the bed would be proposed to increase overall channel stability in the reach and lower the risk to the adjacent recreational trails and park space. Removal or Risk (SC -1B) The Removal of Risk alternative for Reach SC -1B recommends that about 200 metres of recreational trail be realigned a greater distance from the channel to be Aquafor Beech Limited 66685 9 Page 21 of 132 Schneider Creek August 11th, 2020 City of Kitchener outside a 50 - 100 year erosion hazard limit, which will also require some impacts to the terrestrial environment and trees. Same as the Do Nothing alternative, this option allows the channel bank to continue eroding and for natural fluvial process to continue within the creek corridor. If keeping the trail alignment adjacent to the channel achieves other priority recreational objectives, the trail could be successively realigned and setback from the channel bank by 5-10 metres every 10-20 years (assuming a 0.5 m/yr erosion rate). Selected Preferred Alternative (SC -1113) Do Nothing was the selected preferred alternative for the Reach SC -1B erosion site. Evaluation results are summarized in Table 2 and detailed in Appendix D. The conceptual design is presented in Figure 2-113 of Appendix E. 4.2.3 Schneider Creek in the Southwest Optimists Sports Fields (SC -3B) Do Nothing (SC -3113) The Do Nothing alternative for the erosion sites in Reach SC -3B would be to allow bank erosion to continue toward the gravel trail, parking lot, and storm water outlet. The erosion rate would continue to be monitored by the City and the infrastructure at risk may eventually be undermined and damaged by erosion and flooding around the creek channel. It is expected that the erosion risk will likely require some mitigation in the future by some combination of either implementing erosion controls (i.e., Local Works) and/or moving the infrastructure away from the channel (i.e., Removal of Risk). Local Works (SC -3113) Under the Local Works alternative for Reach SC -3B, bank restoration and erosion protection measures are recommended for the eroding banks along about 160 metres of the channel, roughly split evenly between the downstream site at Pioneer Drive (SC -3B -A) and the upstream site at Homer Watson Blvd (SC -3B -B). The recommended approach includes minor channel realignment with stone -toe protection (native -sized cobble) and bioengineering by regrading the banks and stabilizing the slopes with native plantings. In the case of the downstream site SC -3B -A, a buried armourstone retaining wall structure (or equivalent) is recommended to protect the parking lot from future channel migration. Future parking lot reconfiguration is to be completed based on a parking needs assessment prior to completion of hard surfacing (traditional asphalt, permeable asphalt, permeable pavers, porous concrete, etc.) and formalization with curbing. The recreational trail may be realigned through the grass median within the parking lot. Aquafor Beech Limited 66685 10 Page 22 of 132 Schneider Creek August 11th, 2020 City of Kitchener For the upstream site SC -3B -B, the drainage issue is to be addressed by installing a formalized outfall with headwall setback from the channel. The new outfall elevation is to be connected with the existing pipe using a combination of a conventional drop structure and a soakaway pit. Possible retrofit of the adjacent Region of Waterloo SWMF 174 on the north side of the channel, and repair of the connecting rip -rap lined outfall channel, may be assessed as part of the project. Reach Based Works (SC -3B) The Reach Based Works alternative for Reach SC -3B would involve channel restoration and stabilization works for at least 400 metres of the 850 m long reach on Schneider Creek between Pioneer Drive and Homer Watson Blvd. A series of local channel realignments, bioengineering of the banks, and cobble- boulder- riffle structures on the bed would be proposed to increase the overall channel stability in the reach and lower the risk to the adjacent recreational trails and park space. Removal or Risk (SC -3B) The Removal of Risk alternative for Reach SC -1B would involve reducing the size and footprint of the existing parking lot by about one third to provide an additional setback of 25 metres from the channel. Same as the other alternatives for the downstream site SC -3B -A, the recreational trail may be realigned through the grass median within the parking lot. Trail realignment for the upstream site SC -3B -B should also be considered to move it outside of the 50 - 100 year erosion hazard limit. Risks to the storm sewer outlet would still need to be addressed by formalizing the outfall. Selected Preferred Alternative (SC -3B) Local Works was the selected preferred alternative for the Reach SC -3B erosion sites. Evaluation results are summarized in Table 2 and detailed in Appendix D. The conceptual designs are presented in Figures 2-C and 2D of Appendix E. Aquafor Beech Limited 66685 11 Page 23 of 132 Schneider Creek August 11th, 2020 City of Kitchener Table 2: Evaluation of Alternatives Summary of Results Site Category Do Nothing Local Works Reach Based Works Removal of Risk SC -1A Physical/Natural Environment 8 12 10 14 Social/Cultural 7 14 11 13 Economic 13 13 12 13 Technical/Engineering 16 15 8 15 Total 44 54 41 55 SC -1B Physical/Natural Environment 12 11 10 10 Social/Cultural 7 14 11 12 Economic 14 11 12 14 Technical/Engineering 22 14 8 18 Total 55 50 41 54 SC -3B Physical/Natural Environment 8 14 10 14 Social/Cultural 6 14 11 5 Economic 13 13 12 8 Technical/Engineering 16 14 8 9 Total 43 55 41 36 5 Summary This addendum study to the 2016 City of Kitchener Integrated Stormwater Management Master Plan is to update the preferred alternative for Schneider Creek at Old Carriage Road (SC -2B) to permit the simultaneous advancement of three (3) additional smaller projects located adjacent to the immediate work area, including four (4) erosion sites. Due to changes in conditions identified by the City, three addendum reaches were reassessed in 2020 for comparison with the 2015 conditions. The selected preferred alternatives for the three addendum reaches SC - 1A, SC -1B, and SC -3B are Removal of Risk, Do Nothing, and Local Works, respectively. Considering the change in conditions at two of the three addendum reaches, along with the proximity of these sites to the primary erosion site SC -3A - C, it is proposed that the EA recommendations be updated to implement the selected risk mitigation works at the three secondary erosion sites as identified in reaches SC -1A and SC -3B. Aquafor Beech Limited 66685 12 Page 24 of 132 Schneider Creek August 10th, 2020 City of Kitchener Appendix A ISWM-MP EA Erosion Site Figures and Concept Drawings for Primary Erosion Site SC -2A -C Aquafor Beech Limited 66685 Page 25 of 132 �gSPt oapO S � �2U SHPN �a z @ z o� O _ U y 3 Q � h �' .Y� 1 SSIEMEN� RO W ci 1 01GK\E SE Z O W �_ w m C031 m ID Z U vG e'v J U 7" y C I Np W (n G i br y C7 p -- 7.. �✓ 9 cn ¢9 t O _ H a N M JS 2i i1 VONVI In "ES MA01) N11E Of O � G N � O � O Y N ' U v.E N N E� L i n y m � 0) S = Z) Baa 7 No Q ff w O L Q Q N L� U+1 4- N O oQ c O N O m m w o t% O N ¢ 2- $ ami m o c 05 O N w N m g y _ r C N I o J �gSPt oapO S � �2U SHPN �a z @ z o� O _ U y 3 Q � h �' .Y� 1 SSIEMEN� RO W ci 1 01GK\E SE Z O W �_ w m C031 m ID Z U vG e'v J U 7" y C I Np W (n G i br y C7 p -- 7.. �✓ 9 cn ¢9 t O _ H a N M JS 2i i1 VONVI In "ES MA01) N11E Of O � G N � O � O a � / ��`. 5 (f 6 s E U o m O W PtN gtN U G FOUN Z U � OLV_ W 1 p1GKtE St, Q U) U a > > w Gy��, c U CO p U w w ; m C L L o N N U O d1 1 a N Q 6 O C7 Ur' D cD q � CJ U t D w w Z m v of 0] r r. 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OI SLI w� j� Q LU LLI S? v f W .� w IL eun Aueawd .. 1 iL mm > ° a06 Lu y .I_ v� U Z00 N w ccc I„ i -l�LD J i;fC-1N4 F O oi 24 C,4 LLm 3 a O LL �l O CLLJ 7 LLJ w J M U m �LLQ y J = N m Lr Q ry: O l w in �0 eu �Ryedad ``\ 9�/ 1 YN U w o ;� o _ 6° t7 is W c< oco E� m U `m w`i I nr �` TTW a" _57 U W C5 j•, r I i I� X Gull Apedwd 1 ui e 1 a W w f i , m I $ U / °{I � cv v m \\ \ �I � a x I) _ V Im it I• I = A mo Q 01 x i' W a � �� w y W LL \\ >> m" ? v mo > ' _ �` I m o' a 1 I$ !z yr e W a LLJ °I� ° — a. 3 3 �� euilRNeaad X 1- 00.1 �4 • eeuiI,tueaad10 o I$ a i. i !a LU W F cr �cr U W oO O = m 2.10 / e c� av �� I E i Schneider Creek August 11th, 2020 City of Kitchener Appendix B March 26th, 2020 Existing Conditions Report with Photographs (Presented to City Staff May 4th, 2020) Aquafor Beech Limited 66685 Page 30 of 132 City of Kitchener _ Schneider Creek EA Addendum Integrated Stormwater Management Master Plan May 4th, 2020 SC -313 Trail Management SC -1A: Manhole & Creek Realignment SC -1 B: Trail Management & Fish Barrier Removal �.* SC -2B -C ISWM-MP i Preferred Alternative (Attachment Ay ISWM-MP Erosion Assessment Primary Opportunities 08/06/2020 Page 31 of 132 E, Watercw�A Ip Fied IDI Date g and LmKim Reach Ler th Rrsk RescaraamlieenYl 11pParwrilks S drwJper at Old Carriage Sr -25-C 16 &4O9 -AA -15 SOD m � 0p erh' - Ye: - - 53 M 72 abtat Er0*W$ftM6WLdtiAt Sdrxider Creek 5016 18 09-JW�15 - Trail mwagettem _ Yrs - - 46 15 61 near viwwcovrw S dwJdc Creel 3036 18 O9 -Jails - Trail rn&+aWfterR 141 - - 41 20 51 near wetereoursr $ dnndder Crttk 3036 17 09 -M -Is - Trail raanagernem 141 40 70 60 r yr Ymterewrse idwmder at Grand River S01A 40 09-jul-15 - FarCed �cary Abd - - - 38 10 +. maihple 08/06/2020 Page 31 of 132 ISWM-MP Erosion Assessment Primary Opportunities Coy If M+Yr ha++9 r Sto—..Wr Management M -w Plan Ap�+3lb de•_-i�� Schneider Creek at Old Carriage (SC -213-C) s . \ '.. ,+9•y ��i• �.+au,.r.,.. Y+Rv*-omro�e rw.sutir+c+. s .... �, .-• °."""'."s'a as s� rte...... 47 ... .--_.- Isczamlex.r,rnnc+...rr. FIWRE A cneexaro�o cnA�aae- EXISTING CONDITIONS MY OF KITCHENER 12A.15 08/06/2020 Page 32 of 132 2 Schneider Creek at Old Carriage (SC -213-C) List of Alternatives MitigationLong — Erosion h 1. Do Nothing ; Examples of Local Works • Must be considered as part of the Municipal Class EA process _ : A Armourstone Wall ®Vegetated Rack Buttress • May be preferred where, for example, other alternatives have extensive environmental impacts or are economically not feasible - J M�� —.--------- - -- --_ -- —.. ---- ----- --- - .-•- —: ------------------ 2. Local Worksa' SCNNEIDEFCREEKATatDC RaFl - ntr.M-w 4ee laczacl PREFERRED ALTERNATIVE CONCEPT • REACH BASED WORKS FlWRE Gftr or KITCHENER 12,9.76 • Localized erosion mitigation to address critical erosion — risks over years to decades • Does not address future long-term erosion issues or : Riffle -pool Sequence �. BioangineaAng maintenance casts son >. Reach -Based Works 4. Removal of Risk • Channel design over longer distances • Balance between"hard" control and "soft" restoration approaches Remove infrastructure or property from hazard zone Remove trails or future trail relocations within corridor Easements or land acquisition • Higher costs and within hazard zones disturbance of habitat Schneider Creek at Old Carriage (SC -213-C) J M�� —.--------- - -- --_ -- —.. ---- ----- --- - .-•- —: ------------------ SCNNEIDEFCREEKATatDC RaFl - ntr.M-w 4ee laczacl PREFERRED ALTERNATIVE CONCEPT • REACH BASED WORKS FlWRE Gftr or KITCHENER 12,9.76 08/06/2020 Page 33 of 132 SC -213-C: Schneider at Old Carriage March 2612020 a 'w 08/06/2020 Page 34 of 132 4 SC -213-C: Schneider at Old Carriage March 261 2020 z vt� 08/06/2020 Page 35 of 132 5 SC -213-C: Schneider at Old Carriage March 26, 2020 zk 7 -Ji FFF 08/06/2020 Page 35 of 132 5 SC -213-C: Schneider at Old Carriage March 261 2020 A�74 { Ads SC -213-C: Schneider at Old Carriage March 26, 2020 N1 0� 0,77 f pq 08/06/2020 Page 36 of 132 6 SC -213-C: Schneider at Old Carriage z.k° March 26 2020 - _ Y� r . z n.r i City of Kitchener Aquafw aQech J Schneider Creek EA Addendum Integrated Stormwater Management Master Plan May 4t", 2020 SC-3B:Trail ManagemenS SC -1 A: Manhole & Creek Realignment �. SC -1 B: Trail Management & Fish Barrier Removal SC -2B -C: ISWM-MP Preferred Alternative (Attachment A) 08/06/2020 Page 37 of 132 7 SC -1A: Manhole March 261 2020 an 4, r A 4yrac'} y 4 41 08/06/2020 Page 38 of 132 08/06/2020 Page 39 of 132 SC -1A: Manhole March 2612020 v 08/06/2020 Page 40 of 132 10 SC -1A: Manhole March 261 2020 Wit, r N11 SC -IA: Manhole March 26, 2020 08/06/2020 Page 41 of 132 SC -1A: Manhole March 261 2020; -� 08/06/2020 Page 42 of 132 12 Schneider Creek (SC -1A) Manhole -0/ A XS -1 CREEK PROFILE A' 00' 1 27 Y.5.2 • GREEK THALWEG KITCHENER W.W.T.P. - OLD MILL P.S. 'r Aq I naF- �iiiiiiiiiiii NFE X6,3 CREEK PROFILE 2 v --j Schneider Creek (SC -1A) Manhole 08/06/2020 Page 43 of 132 13 -0/ KITCHENER W.W.T.P. - OLD MILL P.S. 'r Aq I �iiiiiiiiiiii NFE 08/06/2020 Page 43 of 132 13 08/06/2020 Page 44 of 132 14 SC -113: Trail Management March 26, 2020 08/06/2020 Page 45 of 132 15 08/06/2020 Page 46 of 132 16 SC -313: Trail Management March 2612020 4�} --.1 W1�rwyle�l a� 08/06/2020 Page 47 of 132 17 SC -313: Trail Management March 261 2020 SC -313: Trail Management March 2612020 08/06/2020 Page 48 of 132 a SC -313: Trail Management March 2612020 08/06/2020 Page 49 of 132 19 Schneider Creek (SC -313) Trail Management xnrea aH ea .ev. r,, ( Stantec Ar Mid PI !t r N- 1 k f HtM1f Schneider Creek EA Addendum Alternatives Alternatives: 1. Do nothing - monitor erosion 2. Local works - regrade, bioengineering - or hard bank protection? 3. Reach -based works - SB -2B -C 4. Removal of risk - trail realignment - drainage management SC -3A: Manhole - cut and remove manhole - pipe not at risk - bioengineering of bank r, SC -1B: Trail Management - Continue monitoring erosion rate - Future trail realignment SC -36: Trail Management (south) - regrade bank, bioengineering - buried armour layer, retaining wall SC -IA: Trail Management (north) - control field drainage to watercourse - regrade slope, bioengineering 08/06/2020 Page 50 of 132 20 Schneider Creek August 11th, 2020 City of Kitchener Appendix C 2020 Existing Conditions Drawings for Addendum Reaches (SC -1A, SC-lB, SC -3B) Aquafor Beech Limited 66685 Page 51 of 132 O CD X11= X11-- N � L (D; � h Q d 1111, 1111=11111 all X11= ill x Ill P a W c m ai f6 � D C) C7 LL c7 L 0 3�Y I�o ) � 11111=III�II�II=11$ W N X > C' v a N Y � m c� w m o d 7 � I ° LL E 1` � Q T G o80L I G G a� m � II (n c O — I I� ISI I I I I s I I IEII I=Ill Hall I W Elllall=lI SIIVIIIry aN N I I WCL \� � j ry �ll�ll�lll�ll�llllo n � ---�aa��aapiauy�S �llf ry I A Will l ll I 111- ry ry ry ry ry ry ����mil I I I� 11=111 I I� 11=110 X11= X11-- N � L ; W h Q d 1111, 1111=11111 all X11= ill x Ill P E C N - U f6 O...p O - U) C7 LL c7 L 0 3�Y I�o ) � 11111=III�II�II=11$ W -� LL 5,154: > C' v a N (0 N 2 m c� w m o d ° E a l m � ° LL E e rn III I 11=11 Q T G o80L N n ow II Illi$ rll Ill�a G G a� m � II II Ill I� ISI I I I I s I I IEII I=Ill Hall I �llf ry I A Will l ll I 111- ry ry ry ry ry ry ����mil I I I� 11=111 I I� 11=110 X11= X11-- ,�� Hill — . 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Doe CO LL. j Tp��p�����771k7�fF��IIp If�III�II�IIP7fF-17frI IIPII 7III�I'IIII.--.�I�I--III . • Ljj lfo"71C"•~iF'S-'I•Cr'r 17fo71Cnri'H~' .. Schneider Creek City of Kitchener Appendix D Detailed Evaluation of Alternative Results August 11L1, 2020 Aquafor Beech Limited 66685 Page 56 of 132 SC -1A Reach SC -1A Evaluation Criteria DO NOTHING LOCAL WORKS REACH BASED WORKS REMOVAL OF RISK 1. Physical/Natural Environment (Score out of 25%) 8 12 10 14 Potential Aquatic Habitat Benefit (Water Temperature) 5 3 2 6 Potential Aquatic Habitat Benefit (Fish Passage) 5 3 2 6 Potential to Reduce Erosion of Public Lands 1 6 6 6 Potential to Reduce Erosion of Private Lands 5 5 5 5 Potential to Reduce Stream bank and Stream bed Erosion 1 6 7 6 Potential to Enhance Groundwater Regime 5 5 5 5 Potential to Reduce Flooding 5 6 6 6 Potential to Improve Terrestrial Habitat 2 6 3 6 Integration with Existing Infrastructure 2 4 3 3 Integration with Existing Environment 2 4 2 6 2. Social/Cultural Environment (Score out of 25%) 7 14 11 13 Aesthetic/ Recreation 4 5 6 5 Compatibility with Adjacent Land Use 2 6 5 6 Community Disruption 3 6 1 5 Public Health and Safety 2 6 6 5 3. Economic Environment (Score out of 25%) 13 13 12 13 Construction Costs 10 5 1 4 Operation and Maintenance Costs 5 5 6 6 Infrastructure Protection 1 6 7 5 4. Technical/Engineering Considerations (Score out of 25%) 16 15 8 15 Ease of Implementation 9 7 2 7 Agency Acceptance 4 4 2 4 Policy/Bylaw Requirements 4 6 6 6 Technical Feasibility 9 7 2 7 Total Normalized Score (1+2+3+4: Score out of 100%) 44 54 41 55 10 = indicated that the retrofit design alternative score high in satisfying the respective design criteria 1 = indicated the retrofit design option scored low in relation to the criteria Page 57 of 132 SC -1B Reach SC -113 Evaluation Criteria DO NOTHING LOCAL WORKS REACH BASED WORKS REMOVAL OF RISK 1. Physical/Natural Environment (Score out of 25%) 12 11 10 10 Potential Aquatic Habitat Benefit (Water Temperature) 8 2 2 5 Potential Aquatic Habitat Benefit (Fish Passage) 8 2 2 5 Potential to Reduce Erosion of Public Lands 2 6 6 5 Potential to Reduce Erosion of Private Lands 5 5 5 5 Potential to Reduce Stream bank and Stream bed Erosion 2 6 7 5 Potential to Enhance Groundwater Regime 5 5 5 5 Potential to Reduce Flooding 5 5 6 5 Potential to Improve Terrestrial Habitat 4 6 3 1 Integration with Existing Infrastructure 3 4 3 1 Integration with Existing Environment 4 3 2 1 2. Social/Cultural Environment (Score out of 25%) 7 14 11 12 Aesthetic/ Recreation 4 5 6 4 Compatibility with Adjacent Land Use 2 6 5 6 Community Disruption 3 6 1 4 Public Health and Safety 2 6 6 5 3. Economic Environment (Score out of 25%) 14 11 12 14 Construction Costs 10 4 1 5 Operation and Maintenance Costs 5 3 6 6 Infrastructure Protection 2 6 7 6 4. Technical/Engineering Considerations (Score out of 25%) 22 14 8 18 Ease of Implementation 10 7 2 10 Agency Acceptance 9 3 2 4 Policy/Bylaw Requirements 6 6 6 6 Technical Feasibility 10 7 2 8 Total Normalized Score (1+2+3+4: Score out of 100%) 55 50 41 54 10 = indicated that the retrofit design alternative score high in satisfying the respective design criteria 1 = indicated the retrofit design option scored low in relation to the criteria Page 58 of 132 SC -313 Reach SC -313 Evaluation Criteria DO NOTHING LOCAL WORKS REACH BASED WORKS REMOVAL OF RISK 1. Physical/Natural Environment (Score out of 25%) 8 14 10 14 Potential Aquatic Habitat Benefit (Water Temperature) 5 4 2 6 Potential Aquatic Habitat Benefit (Fish Passage) 5 4 2 6 Potential to Reduce Erosion of Public Lands 1 7 6 6 Potential to Reduce Erosion of Private Lands 5 5 5 5 Potential to Reduce Stream bank and Stream bed Erosion 1 7 7 6 Potential to Enhance Groundwater Regime 5 6 5 5 Potential to Reduce Flooding 5 6 6 6 Potential to Improve Terrestrial Habitat 2 7 3 6 Integration with Existing Infrastructure 2 6 3 2 Integration with Existing Environment 2 5 2 6 2. Social/Cultural Environment (Score out of 25%) 6 14 11 5 Aesthetic/ Recreation 4 6 6 2 Compatibility with Adjacent Land Use 2 6 5 2 Community Disruption 2 5 1 1 Public Health and Safety 2 6 6 3 3. Economic Environment (Score out of 25%) 13 13 12 8 Construction Costs 10 4 1 2 Operation and Maintenance Costs 5 5 6 4 Infrastructure Protection 1 7 7 3 4. Technical/Engineering Considerations (Score out of 25%) 16 14 8 9 Ease of Implementation 9 6 2 4 Agency Acceptance 4 4 2 4 Policy/Bylaw Requirements 4 6 6 3 Technical Feasibility 9 7 2 3 Total Normalized Score (1+2+3+4: Score out of 100%) 43 55 41 36 10 = indicated that the retrofit design alternative score high in satisfying the respective design criteria 1 = indicated the retrofit design option scored low in relation to the criteria Page 59 of 132 Schneider Creek August 11th, 2020 City of Kitchener Appendix E Concept Design Drawings for Addendum Reaches (SC -1A, SC-lB, SC -3B) Aquafor Beech Limited 66685 Page 60 of 132 N a> Y 6 N U O Z LE 0 O m X Cl) N � O S L W -0 a� 0 N Q W x W i i i \ Q) c co C of I a0 I 00 i I lapiauyjs 4 N M ry ry ry ry ry ry ������llf ry I A 11-111 l Ial11- I I I� 11=111 I I� 11=110 Hill — X11= X11=- ,�� . —1II11 Ill I I II1=11I� I I� I1=11 all1111, I� — II =G, W Ill�l�ll�ll�l�lm z III 11—I I 11—El I I U �IIIll111 11 cn ° 11- I l- 2 W X11=III�II�II—II $ i oo� m t— m Q W w —I—I �ll z O 1101,�I I1 1111ll W J X11=III�II�II—II LL] Q llts a O C W � a � II II I I II Illi ° w LL - o Illi II Illl� - U W z n II I" lll r o o W -.0,0 11—I c'~z >N 6 ., > m�`mz E rll 11 1111a II Illi _ w N v > I1 N —111 z Oil In _ ll< 0 cn Z I�IIll" - - < _W III�II-11 X11111 Q ¢ W II 11 11 11 11 HE EN° wcnF ll- ems Uwe —1I I� I1=1I—I - O {L lll ll _ o w lllll v _ c Z w lll ll� c = z �v OOCi 111 I I—I I� I I I w o a U U II�II�_�II�II�=ry o llllllllll z N a��m lll ry ry ry ry ry ry ry rv� ry ry ry ry � N M ,. 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