HomeMy WebLinkAboutINS-16-047 - Stormwater Management Master Plan Final Report
REPORT TO: Community and Infrastructure Services Committee
DATE OF MEETING: May 30, 2016
SUBMITTED BY: Hans Gross, P.Eng., Director of Engineering
519-741-2200 ext. 7410
PREPARED BY: Nick Gollan, C.E.T., Manager, Stormwater Utility
519-741-2200 ext. 7422
WARD(S) INVOLVED: All
DATE OF REPORT: May 19, 2016
REPORT NO.: INS-16-047
SUBJECT: Stormwater Management Master Plan Final Report
________________________________________________________________
RECOMMENDATION:
THAT Council approve the City of Kitchener Integrated Stormwater
(ISWM-MP) Municipal Class Environmental Assessment Report prepared by
Aquafor Beech Ltd. and dated May 19, 2016 together with the reco
and
THAT staff be directed to file the report for the 30 day public review period as requi
Environmental Assessment Act; and further
THAT staff be directed to develop an Implementation Plan, with a
maintenance strategy, resource requirements, and supporting poli
in staff report INS-16-047.
EXECUTIVE SUMMARY:
-MP) continues
-of-the-
Stormwater Utility and Credit Program. The ISWM-MP updates the 2
decision support tool, providing direction for the prioritizatio
completed as a Master Plan, an approved process under the Ontario Environmental Assessment
Act. The various alternatives, evaluation criteria and recommended ap
stormwater management program elements in the ISWM-MP as laid ou16-046
were endorsed by Environmental Committee on May 19, 2016.
*** This information is available in accessible formats upon request. ***
Please call 519-741-2345 or TTY 1-866-969-9994 for assistance.
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A consultation plan developed early in the study process focused
obtain enhanced public input and improve citizen participation. It was th
MP to move citizen engagement beyond a process of simply present
community visioning opportunity and a chance to create excitemen
and ideas as well as encourage public support and critique of th
Public Open Houses ss
opportunity for the comm
improved in their neighbourhood, on their property and in their
received as part of the second open house relating to the study
approach as
Local stakeholders, agencies and the
broader development community were also invited to participate ay
Overall, the six elements of the ISWM-MP have been developed wit
integration. The identified projects are planned to be complete
planned City initiatives to better serve the residents of Kitche
this way, the City goals to increase urban tree canopy, construc
improve transit, rehabilitate parks and reconstruct City roads c
stormwater management leveraging economies of scale. At its core
for the City to better allocate existing funding to projects and
stand to show the greatest improvement.
1.What are the main reasons for undertaking the study?
Develop an inventory of the existing conditions of the subwaters
Being able to prioritize improvements to the infrastructure with
separate environmental assessments; and
Developing new practices to manage climate change as it affects
urban areas.
To understand the existing conditions of the subwatersheds and i
needed to be collected to inform the approach going forward. Eve
for stream health, water quality, aquatic ecology, terrestrial e
management. Overall approximately 25% of the urban area is treated by stormwater
infrastructure such as ponds or oil grit separators to control f
75% of the area flowing uncontrolled into local creeks and the Gra
with the detailed design and construction of individual elements
completion of the 30 day review. Further citizen engagement will
elements of the work to help shape and refine the detailed desig
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approach to stormwater management focuses on runoff prevention,
and acknowledges the benefits provided by natural systems, recog
ion
with conventional SWM approaches to better and more efficiently
improve the environment.
Through the use of rain gardens, permeable pavements, rainwater
perforated pipes and tree clusters among others, the City will i
into everyday urban forms and into the very fabric of the commun
and healthy community is formed whereby the very features which
inhabitants (roads, parks, grassed areas, sidewalks) become the
local creeks, maintain our groundwater supplies, create habitat
livable.
In this approach conventional sidewalk becomes a permeable sidew
bioswale, a road becomes a stormwater filter, a parking lot beco
ponds and a front yard becomes an oasis.
2.What environmental concerns are addressed by the study?
Degraded surface water and groundwater quality;
Warming of local creeks which can affect fish;
Increased sediment being delivered to local creeks;
Negative effects on human and animal health;
Loss of fish and wildlife habitat, and natural features;
Increased flooding and creek erosion;
Reduced groundwater recharge (our drinking water source); and
Overwhelming of the municipal storm sewer system resulting in fl
The study was started with the basic recognition that urban area
many ways, as a result of both new development and existing deve
land uses within the City can impact the natural environment, as
life which depends upon it. When we build cities, we change the
that land reacts to rainfall. Rainfall that previously contribut
now causes flow to occur and consequently, the amount of water d
significantly increases.
At its core, t-MP looks to address these concerns. This plan reflects the
change in the way in which the public and policy makers regard t
change, embodied within the principles of Low Impact Development
considerable changes in the planning, design and construction of
infrastructure necessary to sustain them.
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Recognizing this evolution in stormwater management, the ISWM-MP
to reducing runoff by managing rainwater where it falls at is source, along with capturing and
filtering runoff as it flows over the land surface and treating
before it reaches the local watercourse.
3.What are the six main elements of the study that will be integra
urban form?
Municipal Pollution Prevention, Operations & Maintenance Practic
Market Based Strategies for Private Property (source controls);
Stormwater for the Capital Roads Program (conveyance controls);
Stormwater Management Facilities;
Watercourse and Erosion Restoration; and
Urban Flood Management & Stormwater Infrastructure.
The ISWM-MP has six elements which are detailed in a series of t
make up the core of the plan. The first element focuses on pollu
practices that can help to prevent impacts before they occur. Th
-neighbourhoods, homes and
businesses while managing stormwater at the same time. This includes selec
tested on a pilot project basis in collaboration with REEP Green
approved 3-two neighbourhoods in
need within the City.
Other elements include improving the way local roads and laneway
constructing Low Impact Development controls like bioswales or p
routine road works; maintaining and improving existing as well a
management facilities as part of park rehabilitations; restoring
managing urban flooding particularly with the threat of Climate
4.accommodate
future climate change?
As part of the ISWM-MP, a storm trunk sewer network model was developed for all pipes
600mm and larger (approximately 6,000 pipe segments which repres
storm sewer network) in order to assess and identify the capacit
network and associated stormwater management ponds. The impact o
increases the number of pipes that flood from 6.2% to 8.8%
Following the development of the storm trunk sewer network model
assessment of the capacity of the existing stormwater management
Approach includes expansion of the existing sewer network model
for future study as part of the Implementation Plan.
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5.What information will the Implementation Plan provide?
Prioritized list of works based on priority subwatersheds;
The market based approaches designed to increase participation i
Stormwater Credit Policy; and
Final staffing recommendations in order to implement the recomme
approach.
The Implementation Plan (under separate cover, anticipated Fall
works based on priority subwatersheds as well as recommend fundi
development. Prioritization will be based on the subwatersheds i
there are opportunities to improve conditions through the elemen
approach. Projects within subwatersheds will be prioritized base
need.
BACKGROUND:
In 2001, the City of Kitchener completed the Stormwater Manageme
Study to develop a Stormwater Management Master Plan that was in
location, design and implementation of stormwater management mea
City. The resulting City of Kitchener Stormwater Management Poli
-of-the-
However, since that time, the approach to stormwater management
As a component of the 2013 City of Kitchener Stormwater Manageme
background and industry practices review was completed which conthe 2001 SWM
Policy did not adequately capture or represent key Federal, Prov
policies, guidelines, and regulations, as well as the City of Ki
law and Credit Policy (2010-113, as amended by 2011-153, as amen
report recommended that the City complete an Integrated Stormwat
following a Master Planning approach in accordance with the Envi
(MEA), October 2000, as amended in 2007 and 2011.
Problem Statement, Opportunity and Constraints:
Urban areas may degrade the environment in many ways, as a resul
and existing development. Pollutants from a variety of residenti
sources impact the environment, as well as terrestrial and aquat
receiving bodies of water. Urban development can also result in
hydrologic characteristics within subwatersheds, where rainfall
contributed little or no runoff to streams now cause flow to occ
amount of water draining to streams significantly increases in v
land uses, together with proposed land use changes, a number of
problems have been identified. These include:
Degraded surface water and groundwater quality;
Thermal enrichment of surface water;
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Increased sediment loads to surface water;
Adverse effects on human and animal health;
Loss and degradation of fish and wildlife habitat, natural featu
Increased flooding and erosion;
Disruption of the pre-development hydrologic process (reduction
recharge and stream baseflow); and
Urban flooding (overwhelming of the municipal storm sewer system
Study Purpose:
The purpose of the ISWM-MP study is to update the City of Kitche
(#I-1135) and serve as a decision support tool as well as a methodo
works. The ISWM-MP also serves as a transparent citizen engagement process by which the City
can establish stormwater management guidelines and policies for
approved, the ISWM-MP will provide direction for resource requirements and identified
relating to the following six (6) stormwater management program elements:
1) Pollution Prevention, Municipal Management & Operational Prac
2) Market Based Strategies for Private Property (source controls
3) Stormwater for the Capital Roads Program (conveyance controls
4) Stormwater Management Facilities,
5) Watercourse and Erosion Restoration, and
6) Urban Flood Management & Stormwater Infrastructure.
Study Goals and Objectives:
The City of Kitchener ISWM-MP considers flood and erosion contro
water quality management, natural heritage, environmental management and infrastructure,
all in an integrated manner as part of an overall plan. In addition, the ISWM-MP integrates
existing policies, regulations, acts and guidelines. The objectives of the City of Kitchener ISWM-
MP include twenty (20) objectives for: water quality (4), water quantity (3), erosion control (2),
natural environment (3), water resource sustainability (2), infr
implementation (3).
Class EA Process:
The ISWM-MP was conducted in accordance with the requirements for Master Plans u
Section 4, Approach #2 of the Municipal Engineers Association Municipal Class Environme
Assessment Act (October 2000, as amended in 2007 & 2011), which ed process
under the Ontario Environmental Assessment Act. As part of the Class EA process evaluation of
alternatives, assessment of the potential environmental effects
measures for potential adverse impacts has been conducted and presented through public and
agency consultations.
The ISWM-MP fulfills all of the Class EA requirements for Schedu
can then proceed directly to detailed design subject to completi
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resolution of any Part II orders, if received. It further identi
future studies.
Study Process:
The Master Plan itself has been completed in two (2) stages as d Figure 1 below. A
separate Implementation Plan (anticipated in Fall 2016) will be
mandatory 30-day public review of the Class EA document. The Imp
allocate funding, prioritize works and inform the development of
policies and by-laws to permit the implementation of the recomme
Project
Commencement:
October 8, 2014
Public Open House
No. 1:
June 14, 2015
Public Open House
No. 2:
April 28, 2016
Figure 1- Integrated Stormwater Master Plan Study Process
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MASTER PLAN REPORT:
Integrated Stormwater Management Master Plan (ISWM-MP) Municipal Class
Environmental Assessment (May 2016)
of stormwater and environmental resources within the City of Kit
including the various alternatives, evaluation criteria and the recommended approaches for the
six (6) stormwater management program elements of:
1)Municipal Pollution Prevention, Operations & Maintenance Practic
2)Market Based Strategies for Private Property (source controls);
3) Stormwater for the Capital Roads Program (conveyance controls);
4)Stormwater Management (SWM) Facilities;
5)Watercourse and Erosion Restoration; and
6)Urban Flood Management & Stormwater Infrastructure.
Separate detailed reports were also prepared for each of the pro
and are included as technical appendices to the ISWM-MP Class EA
the six (6) stormwater management program elements which make up Recommended
Approaches are provided below.
RECOMMENDED APPROACHES:
1)Municipal Pollution Prevention, Operations & Maintenance Practic
Pollution Prevention, Municipal Management and Operational Pract
ensure pollutants are prevented from impacting the environment a
stormwater infrastructure maintain their effectiveness. The ISWM
the most cost effective manner. The study and resulting recommen
completed following Schedule A/A+ of the Municipal Class EA proc
approved.
Catch Basin Clean-out, Street Sweeping and Leaf Pick-up Program
The ISWM-MP reviewed existing street sweeping and leaf collectio
completed a detailed assessment of catch-basin sediment quality
(4) representative areas of the City corresponding to a new subd
subdivision (minimum of 10 years and 30 years since development
industrial/ commercial area. Recommendations included:
That the existing street sweeping and leaf collecting programs b
assess the potential to integrate catch-basin cleaning to increa
cost.
Sediment removal from catch-basins within uncontrolled areas (ar
stormwater ponds or OGS units) be completed within priority subw
detailed in the Implementation Plan.
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Oil and Grit Separator (OGS) Cleanouts
OGS units are designed to capture sediment and oils from the storm sewer network prior
stormwater being discharged. The City of Kitchener is currently responsible for the operation
and maintenance of sixty-five (65) OGS units in the City, with n
road reconstruction projects where technically feasible. Mainten
fourteen (14) of the most critical units and the remainder have
operational status or recommended for additional study within th
evaluated thirty-two (32) units with available information and q
maintenance requirements and concluded that sixteen (16) OGS uni
maintenance, six (6) OGS units were classified as high priority
classified as moderate and low priority. Ultimately, all of the
service at some point as a condition of the Environmental Compli
installation.
2)Market Based Strategies for Private Property (source controls)
In 2011, the City established a stormwater utility fee and credi
of the fee to encourage private landowners to implement on-site
pollution prevention measures. To support landowners implementin
measures such as rain gardens, bioswales, redirecting downspouts
partnership with Residential Energy Efficiency Project (REEP Gre
information, resources and direct expert guidance to residential
institutional (ICI) property owners.
However, the number of applications by residents and businesses received for participating in
the Stormwater Utility Credit Policy has decreased in volume rec
program was introduced in 2012. Overall uptake sits at approxima
non-residential properties. To increase uptake of SWM and pollut
market-based research was undertaken to develop enhancements to
programming. The City of Kitchener undertook an extensive market
explore and understand the "wants and needs" of residents and bu
and service those interested in improving stormwater management
research included a comprehensive review of leading jurisdiction
development of a demographic profile of the residents of the Cit
Interviews with business property owners/managers, builders/deve
providers (in the fields of landscape design and installation, r
sciences, and porous/permeable surfacing).
A research session (March 11, 2015) with a demographically repre
single-family homeowners in the City.
Based on the results of the market-based research, the recommend
that in addition to the existing residential credit program, the
opportunity to determine the appropriateness of a variety of inc
support and service those interested in improving stormwater man
residential properties. Approaches such as various financing opt
8 - 9
review enhancements, and service charge reductions will be evalu
methods will be detailed as part of the implementation plan to b
months. It is proposed that the City try a few selected methods
focus on priority watersheds in collaboration with REEP Green So
approved 3-year ($439,500)
Kitchener.
The goal of this element of the Recommended Approach for source
twenty percent (20%) uptake over a five year period, allowing th
SWM measures at just over 25% of non-residential properties by 2
3)Stormwater for the Capital Roads Program (conveyance controls)
As an element of the Recommended Approach, the City has identifi
treatment options (conveyance controls) that can be incorporated
Forecast for road right-of-way (ROW) reconstruction (resurfacing) and full reconstruction
projects until 2024 for local, minor and major roads as well as
are linear stormwater transport systems that are generally locat
roadways. They encourage infiltration of water into the ground,
reduce runoff. They can include traditional curb and gutter syst
bioswales, grassed channels and subsurface perforated pipe syste
The incorporation of a cost-effective ROW retrofit approach usin
SWM controls (i.e. Oil and Grit Separator (OGS) and other treatm
Development (LID) approaches as part of planned road reconstruct
presents a significant opportunity to improve SWM control (water
erosion mitigation and water balance) in a cost effective manner
the City built prior to the implementation of modern stormwater
addition, ROW retrofits have the added benefit of providing an o
aesthetics, mitigate and adapt to climate change conditions and
effects.
The ISWM-MP evaluated through desktop and field investigations,
laneways identified within the 10-year Capital Forecast and deve
alternatives for one-hundred seven (107) roadway projects and tw
projects.
To direct the implementation of the Recommended Approach, a deci
select the appropriate SWM treatment options for all Capital ROW
and in consultation with the Region of Waterloo Hydrogeology and
staff, a document has been developed which defines where and how
runoff can safely occur in the context of the approved source pr
The above has been completed following Schedule A/A+ of the Muni
therefore, all recommended works are considered pre-approved.
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4)Stormwater Management (SWM) Facilities
The Recommended Approach for Stormwater Management Facilities is
individual elements of:
1.Sediment Removals from Existing SWM Facilities
2.Planned SWM Retrofits
3.Park Rehabilitation and SWM Enhancements
Sediment Removals from Existing SWM Facilities
The City of Kitchener inventory includes one hundred and thirty-
require regular maintenance (not including natural ponds). The IMP determined the
effect of sediment accumulation on existing SWM facilities and d
those requiring maintenance based on the amount of sediment with
effect of this accumulation in terms of loss in storage or decre
facilities were grouped according to the facility type (i.e Dry
Dry facilities (only have water in them during certain storm eve
and were assessed based on the loss in storage capacity. Wet Fac
quality control via a permanent water pool to allow the accumula
stormwater. Wet facility sizing is based on the level of protect
Total Suspended Solid Removal (TSS). A decrease in performance w
efficiency/level of protection due to sediment accumulation. Mai
clean-outs) were prioritized accordingly. The ISWM-MP recommenda
Of the thirty-one (31) Dry facilities identified:
Seven (7) were assessed as High Priority (>20% Loss)
o
Two (2) were assessed as Moderate Priority (11-20% Loss)
o
Seven (7) were assessed as Low Priority (6 -10% Loss)
o
Of the sixty-two (62) Wet facilities that were analyzed:
Twenty-Two (22) were assessed as High Priority
o
Three (3) were assessed as Moderate Priority
o
Two (4) were assessed as Low Priority
o
The above has been completed following Schedule A/A+ of the Muni
therefore all the recommended works as detailed above are consid
the maintenance of SWM facilities is a legislated requirement as
Environmental Compliance Approval issued for their construction.ed
SWM facilities on a planned basis since 2014.
Planned SWM Retrofits
As part of previous Class Environmental Assessments (EAs) comple
eighteen (18) existing ponds were identified as feasible retrofi
enhance the water quality, quantity and erosion control performa
management facilities and bring them in-line with current standa
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The City has already completed retrofits at eight (8) facilities
remaining planned retrofits awaiting implementation include Pond
part of Kolb Creek project), 66, 10, 16, 65, 61, 21, 7, 62, and 11.
Park Rehabilitation and SWM Enhancements
To identify locations where new stormwater management facilities
combination with park rehabilitations to increase the proportion
areas in the City to improve: water quality and quantity control
four (4) phase assessment was conducted.
Phase 1 - GIS/Land Assessment: identified potential locations within the study area. Six
(6) screening level assessment criteria were utilized to determi
Phase 2 - Field Reconnaissance/ Impact Assessment: consisted of a much more detailed
and thorough assessment of each potential location. This phase used a combination of
a field reconnaissance and as well as the assessment of each feasible location for
impacts and/or opportunities related to the technical, environme
considerations.
Phase 3- Performance Assessment: evaluated the performance capabilities of each site
carried forward using primary and secondary criteria per the Sto
Planning and Design Manual, MOE (2003). This step also identifi
facility alternatives for each location (surface or subsurface s
Phase 4 Consultation with City Staff: Each potential location was reviewed and (5)
sites were eliminated based on identified issues such as high groundwater, soil
conditions and future development (i.e. future school site and highway expansions by
MTO).
A total of thirty (30) potential sites were screened, of which twelve (12) were deemed feasible
as either a surface facility (SWM Pond, wetland etc.) or subsurf
storage facility) following the four (4) phase process. Preferre
were evaluated in fulfilment of Schedule B Class EA requirements
primary categories of:
Physical & Natural Environment Criteria - Water Quality, Stream Geomorphology,
Aquatic Habitat, Fisheries, Wildlife and Groundwater Resources
Social & Cultural Criteria - Visual Aesthetics, Recreational Opportunities,
Cultural/Heritage Resources and Health & Safety
Technical & Engineering Criteria - Flood Control, Erosion Control, Ease of
Implementation and Operations & Maintenance
Economic Criteria - Capital Costs, Operations & Maintenance Cost, Lifecycle Costs an
Ability to coordinate with other projects
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Alternatives, with higher scores represented the greater fulfilm
The preferred solutions for each of the twelve (12) opportunities were then selected based on
highest total score from all of the evaluation criteria across e
The twelve (12) sites included within the Recommended Approach f
SWM Enhancements are listed in Table 1 below.
Table 1 Twelve (12) Sites Included in the Recommended Approach for Park
and SWM Enhancements
Map & Site ID Location Name Preferred Alternative
2-1 Victoria Park Subsurface Storage Facility
2-2 Cameron Heights Pool & Kaufman Park Subsurface Storage Facility
Subsurface Storage Facility with Wet
2-3 Cherry Park
Pond
3-4 Roseburg Park Subsurface Storage Facility
4-2 Idlewood Greenway Subsurface Storage Facility
4-5 Prospect Park Wet Pond
5-2 Sandrock Hydro-Corridor Wet Pond
Wet Pond
5-5A Country Side Park
5-5B Country Side Park Wet Pond
6-1 Country Hill Park Subsurface Storage Facility
Wet Pond
6-3B Millwood Park
7-2 Biehn Park Subsurface Storage Facility
The above has been completed following Schedule B of the Municip
therefore, may proceed directly to detailed design subject to th
review. As this work would be done in collaboration with park improvemen
these projects will be somewhat budget dependent and will be loo
during the development of the Implementation Plan anticipated in
5)Watercourse and Erosion Restoration
The purpose of the stream erosion assessment component of the IS
tand to create an inventory of erosion sites that
could potentially be addressed through creek-based restoration w
methodology was used to assess the levels of risk and environmen
classify the erosion sites (primary and secondary). Stream rest
the identified erosion site and restoration reach opportunities,
Official Plan
and the recently Council approved Fish Habitat Banking Arrangeme
Fisheries and Oceans Canada. The primary sites are listed in Table 2.
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Table 2: Primary Stream Restoration Opportunities in Alphabetica
Watercourse, Location Reach ID Risk Preferred Solution
Borden Creek at Concordia Park BD-1A Sanitary Sewer Local Works
Borden Creek at Concordia Park BD-1A Water Main Removal of Risk
Borden Creek downstream of BD-1B Sanitary Sewer Removal of Risk
Conestoga Pkwy
Lower Laurel Creek LC-1A-B, 2A Sanitary Sewer, Building Reach Based
1
Works
Montgomery Creek at Vanier MG-1E-F Water Main, Culvert Removal of Risk 2
Sandrock Creek at Westheights SR-2B Trail, Storm Sewer Outfalls Local Works
Schneider Creek at Manitou SC-4L-5A Water Main (Abandoned) Removal of Risk 2
Schneider Creek at Old Carriage SC-2B-3A Trails, Private Property Local Works 1
Shoemaker Creek SM-2B-E Sanitary and Storm Reach Based Works
Sewers
Stonegate (Hofstetter) Creek ES-GRT6-1 Storm Sewer Removal of Risk
Strasburg Creek Downstream of Old SB-13A Culvert, Sanitary Sewer Local Works 1
Huron
Voisin Creek at Greenbrook VS-1A Road, Sidewalk, Utilities Reach Based Works
1 Requires land rights (i.e., acquisition and/or easements) and a
2 Optional works to expand the scope and length of stream restora
Alternative solutions were assessed for each of the primary stre
recommend a preferred solution. Four preliminary alternative sol
case, including:
Do Nothing No creek-based works to address existing erosion or to mitigate
risks
Local Works Selective creek-based works to address local erosion issues and
to improve stream habitat
Reach Based Works Extensive creek-based works to address erosion issues and risks
and to improve or fully rehabilitate stream habitat
Removal of Risk Elimination or reduction of the erosion risk within the creek c
by removing, realigning, or redesigning the associated infrastru
addressing land rights for properties within the stream corridor
zone.
Preliminary alternatives for each of the primary stream restorat
evaluated in fulfilment of Schedule B Class EA requirements base
summarized below:
Physical/Natural Environment - Potential Aquatic Habitat Benefit (Water Temperature),
Potential Aquatic Habitat Benefit (Fish Passage), Potential to R
Lands, Potential to Reduce Erosion of Private Lands, Potential t
and Stream bed Erosion, Potential to Enhance Groundwater Regime, Potential to
Reduce Flooding, Potential to Improve Terrestrial Habitat, Integration with Existing
Infrastructure and Integration with Existing Environment.
8 - 14
Social/Cultural - Aesthetic / Recreation, Compatibility with Adjacent Land Use,
Community Disruption and Public Health and Safety
Economic - Construction Costs, Operation Maintenance and Infrastructure Pro
Technical/Engineering - Ease of Implementation, Agency Acceptance, Policy/Bylaw
Requirements, Technical Feasibility
Alternatives, with higher scores represented the greater fulfilm
The preferred solutions for each of the primary stream restorati
selected based on highest total score from all of the evaluation
alternative solutions.
The prioritization of the stream restoration opportunities (Table 2) will be integrated within a
system-wide evaluation of stormwater management priorities and s
the context of other City projects as part of the Implementation
6)Urban Flood Management & Stormwater Infrastructure
As part of the ISWM-MP, a storm trunk sewer network model was developed for all pipes
600mm and larger (approximately 6,000 pipe segments which repres
storm sewer network) in order to assess and identify the capacit
network and associated stormwater management ponds under five (5
Scenario 1 - Existing Conditions: Calibrated trunk sewer model based on one-year of
monitoring data completed as part of the ISWM-MP. Known flooding locations as
reported by the City of Kitchener staff demonstrate good agreeme
model.
Scenario 2 - Climate Change on Existing Conditions: The 5 year storm was increased by
20% to reflect climate change impacts per the recommendations of
Climate Projections for Waterloo Region (September 2015).
Scenario 3 - LID Volume Control on Existing Conditions: Reflects the application of a
12.5mm volume control target (city wide) to reflect the benefits
existing conditions.
Scenario 4 - Climate Change & LID Volume Control: is a combination of Scenarios 2 and
3, and reflects the benefits of the 12.5mm volume control target (city wide) and the
impacts of the predicted climate change conditions.
Scenario 5 Intensification on Existing Conditions: Reflects the impact of
intensification within Priority A and B areas per the City of Kitchener Growth
Management Plan on the existing trunk sewer system.
The completed Climate Change assessments of the stormwater trunk
keeping with Strategic Priority of Sustainable Environment and I
-
assets so that they are affordable, dependable and sustainable i
Change scenario was developed based on the Localized Climate Pro
Region (September 2015) developed by the Interdisciplinary Cente
and the University of Waterloo.
8 - 15
Table 3 summarizes the modelling results of the five (5) scenarios and l
pipe at capacity and the total length of pipe which is surcharge
capacity which can result in flooded roads and property).
Table 3 - Summary of Trunk Sewer Model Results: Scenarios 1-5
Total Length of % Length of Pipe Total Length of % Total Length
Scenarios ID Scenarios Name Pipe at Full at Full Capacity Surcharged Pipes of Surcharged
Capacity (m) (%) (m) Pipes (%)
1 Existing Conditions 10,723 4.8% 13,763 6.2%
Climate Change on
13,934 6.3% 19,566 8.8%
2
Existing Conditions
LID Volume Control
on Existing 4,585 2.1% 5,842 2.6%
3
Conditions:
Climate Change &
10,685 4.8% 14,691 6.6%
4
LID Volume Control
Intensification on
12,427 5.6% 14,671 6.6%
5
Existing Conditions
Following the development of the storm trunk sewer network model
assessment of the capacity of the existing stormwater management
Approach includes expansion of the existing sewer network model to areas to be identified
for future study as part of the Implementation Plan. The model e
to evaluate and select the preferred remedial approaches to impr
THE IMPLEMENTATION PLAN
The Implementation Plan (under separate cover, anticipated Fall
works based on priority subwatershed as well as recommend fundin
development. Prioritization will be based on the watersheds in t
are opportunities to improve conditions through the elements of
The implementation plan will detail:
The market based approaches designed to increase participation i
Credit Policy taking into consideration all costs and resource r
staffing, overhead expenses, consulting services, advertising an
miscellaneous program related expenses;
How identified works
Department of Fisheries and Oceans (DFO) through the additional
enhancement projects as completed through City projects and the
approach. Furthermore, the plan will explore the development of
potential future stormwater funding source;
Various incentives for property owners who implement private sto
part of the Stormwater Utility Credit Program within prioritized
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and
multi-residential land uses within the City;
Strategic alignments in regards to the operation and maintenance
stormwater management facilities, specifically, the development
mechanism and service level agreement between the Stormwater Uti
to better track allocated O&M funds and direct the allocation of
will consider the creation of an operations unit funded by the S
priority focus on the completion of stormwater related operation
tasks and associated projects as identified through the recommen
Final staffing recommendations in order to implement the recomme
Market-based approach implementation, conveyance and SWM facilit,
InfoSWMM model expansion, monitoring and operations and maintena
Two (2) supporting documents which have been prepared in draft a
process in collaboration with City staff, the Region of Waterloo
Environment and Climate Change, will be finalized as part of the
form the basis for the development of the future stormwater poli
defines where and how infiltration of runoff can safely
occur in the context of the approved source protection planning Stormwater
s the proposed minimum stormwater volume criteria and
targets for intensification as
well as linear projects.
In order to ensure the goals and objectives of the Master Plan a
monitoring program will also be established as part of the Imple
address the need for resources required to:
Stay current in the review of monitoring reports and data as req
subwatershed plans and other policies;
The creation of a shared water quality data base (currently unde
with the GRCA);
Analyze and complete Phase 4 of the adaptive environmental manag
feedback loop of subwatershed plans, environmental studies and o
four (4) phase AEM approach requires Characterization (Phase 1),
Assessment (Phase 2), Implementation (Phase 3) as well as Monito
Refinement of the management strategy (Phase 4). The analyzed d
follow-up monitoring is used to test the assumptions made during
phases to evaluate the performance of the selected management st
make necessary adjustments. When all four (4) phases of the AEM
completed the process cannot ensure project goals and objectives
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ALIGNMENT WITH CITY OF KITCHENER STRATEGIC PLAN:
Strategic Priority: Sustainable Environment and Infrastructure
Strategy: SE2 Stormwater Master Plan
Strategic Action: 4.2 Develop measures to manage stormwater and
the
FINANCIAL IMPLICATIONS:
The Implementation Plan that will be developed for the Fall of 2
existing 9.2% projected annual stormwater rate increase over the
infrastructure funding from other levels of government. Costs id
dollars.
1)Municipal Pollution Prevention, Operations & Maintenance Practic
Sixteen (16) OGS units require maintenance, six (6) OGS units we
priority (Estimated Cost: $130,000) and ten (10) OGS units were
and low priority (Estimate Cost: $65,000)
2)Market Based Strategies for Private Property (source controls)
The 5-year program costs including all resource requirements, including staffing,
overhead expenses, consulting services, advertising and promotion, and mis
program related expenses (Estimated 5-year cost: $3.5 million).
3)Stormwater for the Capital Roads Program (conveyance controls)
Implementation of the preferred approach would utilize the exist
contribution to the AIRP projects, and require an additional $1.
funding up to 2024 for turf versus highly vegetated aestheticall
options, respectively. Laneway implementation would require an
in funding or result in a savings of $330,000 for permeable pave
pipe, respectively.
4)Stormwater Management (SWM) Facilities
Sediment Removals from Existing SWM Facilities (See Table 4)
Of the Thirty-one (31) Dry facilities that were analyzed:
a.Seven (7) High Priority
b.Two (2) Moderate Priority
c.Seven (7) Low Priority)
Of the Sixty-two (62) wet facilities that were analyzed:
d.Twenty-Two (22) High Priority
e.Three (3) Moderate Priority
f.Four (4) Low Priority
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The completion of sediment removal from existing facilities is
Planned SWM Retrofits
The ten (10) remaining planned retrofits awaiting implementation
(currently underway), 66, 10, 16, 65, 61, 21, 7, 62, and 111. Co
part of the previous Class EAs, estimate the implementation cost
Park Rehabilitation and SWM Enhancements
The implementation of the proposed SWM facility opportunities is
$32.1 $41.2 million with an additional $4.3 $8.1 million required for park
rehabilitation.
5)Watercourse and Erosion Restoration
Based on the primary list of erosion sites and restoration reach.0
$15.0 million in stream restoration projects have been considered wit
Stormwater Master Plan. An additional $4.0 $5.0 million in secondary projects have
been identified that the City may consider when opportunities ar
projects, not including any associated costs for addressing land
property. Stream restoration projects already within existing s
excluded from these cost estimates.
6)Urban Flood Management & Stormwater Infrastructure
The replacement of the 14,961m of surcharging pipe identified as
an estimated cost of $17 million. To address pipe capacity issue
trunk sewer system (i.e. <600mm) modelled as part of the ISWM-MP
recommended that the City allocate an additional $23.0 million.
Estimated capital costs estimates for each element of the Recomm
in Table 4 below.
Table 4 - Recommended Approach -
Capital Cost Estimate
Recommended Approach Element
($ millions)*
1)Municipal Pollution Prevention, Operations & Maintenance
Practices
a.OGS Maintenance (High, Moderate & Low Priority) $0.2
2)Market Based Strategies for Private Property (source controls):
$3.5
5 year program costs
3)Stormwater for the Capital Roads Program (conveyance controls)
$1.9 to $11.1
a.Roadways
$-0.3 to $1.7
b.Laneways
4)Stormwater Management (SWM) Facilities $3.2
a.Sediment Removals (High, Moderate & Low Priority) $6.0
b.Planned Retrofits $32.1 to $41.2
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c.Park Rehabilitation and SWM Enhancements (new SWM
Facilities including park rehabilitation)
5)Watercourse and Erosion Restoration $14.0 to $20.0
6)Urban Flood Management & Stormwater Infrastructure
(includes estimated costs for pipes smaller than 600mm which $40.0
were not modelled)
TOTAL $100.6M to $126.9M
* Rounded to the nearest $100,000
COMMUNITY ENGAGEMENT:
A Consultation Plan was developed in co-operation with City and Recognizing the
mandatory requirements for Public Consultation under the Municip
Consultation Plan ensured all mandatory requirements were met wh
innovative approach that provides for enhanced public input and
for improved participation of residents to secure feedback. It w
move public consultation beyond a process of presentation and fe
visioning opportunity and a chance to create excitement, secure
encourage public support.
CONSULT - The public consultation completed for the ISWM-MP incl
Notice of Study Commencement (The Record, October 3, 2014)
Public Open House No. 1 (June 14, 2015)
Wonders of Nature Stormwater Display at Huron Natural Area (Augu
included a survey for participants to fill out.
Public Open House No. 2 (April 28, 2016) which included the dist
3,000 letters to residents who lived in neighbourhoods where a s
was identified as part of the Recommended Approach.
Public Advisory Committee Cyber Newsletters with response forms
stakeholder, municipalities, agencies, Provincial and Federal Mi
Newsletter No. 1 January 16, 2015
o
Newsletter No. 2 June 9, 2015
o
Newsletter No. 3 October 9, 2015
o
Newsletter No. 4 & Comment Response to date April 1, 2016
o
Waterloo Region Homebuilder Association (WRHBA)
November 20, 2015
o
March 18, 2016
o
Public Advisory Committee Workshop April 21, 2015
Environmental Committee (EC)
November 19, 2015
o
March 17, 2016
o
May 19, 2016
o
EC endorsed the six ISWM-MP program elements as outlined in INS-16-046.
o
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COLLABORATE -
ere offered which provided an opportunity for participants to sh
neighbourhood, on their
property and in their community. Comments received as part of Op
the direction of ISWM-MP described the approach as
No. 2 were excited
and supportive of the concept and appreciative to be able to par
meaningful way.
Thirteen (13) questionnaires (from the total of 55 registered in
following Open House No. 2. In summary:
85% of respondents agreed with the evaluation criteria presented
69% of respondents agreed with the recommended approach for Mark
Strategies for Private Property (source controls)
92% of respondents agreed with the recommended approach for Pollon Prevention,
Municipal Management and Operation Practices & Stormwater for the Capital Roads
Program (conveyance controls)
69% of respondents agreed with the recommended approach for Park Rehabilitation
and SWM Enhancements
86% of respondents agreed with the recommended approach for Wate
Erosion Restoration
77% of respondents agreed with the recommended approach for Urban Flood
Management & Stormwater Infrastructure
Note: The vast majority of respondents, who did not agree with t
entered a response of No-opinion.
92% of respondents found that the project team was helpful in an
keeping them informed and that the information provided was help
85% of respondents heard about the Public Open House by letter
INFORM -
council / committee meeting.
PREVIOUS CONSIDERATION OF THIS MATTER:
INS-14-037
Stormwater Policy Review and Proposed Master Plan
Staff were directed to proceed with the development of an Integr
o
Stormwater Management Master Plan to replace Stormwater Manageme
Policy #I-1135.
INS-15-076 Stormwater Management Master Plan Status Update
Staff provided a progress update to Council on the development o
o
ACKNOWLEDGED BY: Justin Readman, Interim Executive Director of Infrastructure Ser
8 - 21