City of Barrie Comprehensive Stormwater Management Master Plan INTERIM Draft Report
APPENDIX A : Notice of Study Commencement Public Information Centre (PIC) Mail-outs and Display Material
Aquafor Beech Limited
03 November, 2015
P.O. BOX 400 BARRIE, ONTARIO L4M 4T5
CITY HALL 70 COLLIER STREET TEL. (705) 739-4207 FAX. (705) 739-4247 THE CORPORATION OF THE CITY OF BARRIE Engineering Department “Committed to Total Service Excellence”
June 16, 2015
File: D03-CO2
To All Area Residents / Business Owners / Tenants / Agencies: Re:
Comprehensive Stormwater Management Master Plan Municipal Class Environmental Assessment (Class EA) Presentation of Alternative Solutions
The Corporation of the City of Barrie (City) has retained the consulting firm Aquafor Beech Ltd. to complete a Comprehensive Stormwater Management Master Plan (CSWM-MP) as required by Policy 4.5 of the Lake Simcoe Protection Plan (LSPP). The LSPP required the completion of this study for each settlement area that drains to Lake Simcoe, thus the portion of the City that drains to Lake Simcoe is included in this study (see attached Study Area map). This CSWM-MP is being prepared in accordance with the Lake Simcoe Conservation Authority (LSRCA) guidance document following Phases 1 and 2 of the Municipal Class Environmental Assessment (Class EA) process pursuant to the approved procedures, as defined in the Municipal Class Environmental Assessment dated October 2000, and as amended in 2007 and 2011. The Notice of Study Commencement was advertised on January 30, 2014 and April 11, 2014. This letter is to advise you of the upcoming activities for this Class EA. A PIC is scheduled for Thursday, June 25th, 2015, 4:00pm to 7:00pm, at the Dorian Parker Centre, 227 Sunnidale Road. The public is invited to attend the PIC to view project information panels and provide comments regarding proposed alternative stormwater management strategies to address the effects of urbanization. City staff will be available to discuss issues and concerns with members of the public. Thereafter, input and comments will be accepted by the City until July 9, 2015. Comments and responses received from the PIC will be considered in the development of the preferred alternative solutions. Traditional stormwater management consists of conveyance systems (storm sewers) and end-of-pipe facilities (stormwater management ponds). This approach focuses on moving stormwater as quickly as possible from where it was generated to a stormwater management pond for water quality treatment as well as flood and erosion protection prior to being discharged to the receiving watercourse. Studies of functioning stormwater management systems using this approach are not providing the desired water quality treatment level and are not sufficiently attenuating stormwater to prevent watercourse erosion. This approach, although beneficial, is showing some limitations and does not adequately address the hydrologic cycle or take advantage of natural processes to better manage stormwater. The alternative approach to stormwater management incorporates natural processes by using low impact development (LID) techniques. LID employs natural techniques to mimic natural hydrology; focusing on treating stormwater where it is generated using a combination of source, conveyance and end-of-pipe LID practices. Numerous LID techniques can be implemented to help address deficiencies with traditional stormwater management including increased water quality treatment efficiency, improve water balance and erosion protection. Examples include: x x x
Source controls – Implementation of rainwater harvesting, downspout redirection to rain gardens/infiltration trenches, green roofs, porous pavement on private property typically by property owners; Conveyance controls – Implementation of LID practices including shallow turf swales, bioswales, infiltration/filtration trenches and perforated pipe systems typically within the public right-of-way; and End-of-Pipe – Implementing alternative end-of-pipe facilities focusing on infiltration techniques (including retrofitting public spaces as identified in this letter).
The development and implementation of the CSWM-MP for settlement areas within the Lake Simcoe Watershed is seen as a key vehicle for meeting the vision and objectives of the LSPP. The CSWM-MP will provide direction to the City of Barrie on how the LSPP objectives will be achieved through the effective management of stormwater within existing and expanding settlement areas. The CSWM-MP includes:
ENGINEERING DEPARTMENT
File: D03-CO2 -2-
Comprehensive Stormwater Management Master Plan (CSWM-MP) x x x x x x x
June 16, 2015
Characterization of existing environmental conditions; Evaluation of cumulative environmental impact from existing and planned development including phosphorus loadings, stormwater quality and quantity control; Consideration of the effects of climate change on stormwater management infrastructure; Examination of stormwater retrofit opportunities including implementation of low impact development (LID) practices; Identification of a recommended stormwater management strategy; Identification of potential funding sources for the recommended stormwater management strategy including the maintenance and renewal of existing stormwater infrastructure, capital improvements and infrastructure upgrades to address climate change; and Implementation plan for the recommended stormwater management strategy.
The City has developed alternative stormwater management strategies and identified specific additional end-of-pipe stormwater management opportunities. The additional opportunities are focused on utilizing existing public parks and playing fields to implement underground infiltration systems that provide water quality treatment. The intent would be to implement the additional opportunities as part of renewal projects; subject to available funds. The table listed below and the attached map identifies each proposed site. The Drainage and Stormwater Management Master Plan prepared as part of the Infrastructure Master Plans prepared for the Annexation Lands and intensification areas within the former City boundary identified End-of-Pipe Techniques (Traditional Stormwater Management) with Low Impact Development (LID) Practices as the Preferred Alternative. This Master Plan included a retrofit assessment at existing stormwater management facilities, primarily focusing on converting dry ponds to wet ponds, new ponds at outfalls and developing online ponds. That assessment identified 28 stormwater management pond retrofits within the City of Barrie. This study can be found at www.barrie.ca by navigating to City Hall>Growth Management>Documents & Resources>Drainage and Stormwater Management>Assessment of Stormwater Management Facilities to Reduce Phosphorus Discharges. The end-ofpipe stormwater management opportunities identified as part of this study are in addition to the existing 28 retrofits identified in the Drainage and Stormwater Management Master Plan. The City has developed additional alternative solutions to address the requirements of the CSWM-MP: Alternative 1 – Traditional Stormwater Management (Do Nothing) This alternative allows for the consideration of maintaining traditional stormwater management systems consisting of storm sewers and wet ponds providing water quality treatment as well as quantity (flood protection) and erosion control. Alternative 2 – Stormwater Management using LID Practices This alternative consists of implementing low impact development practices to utilize natural processes to provide water quality treatment. LID does not provide quantity control (flood protection) for major storm events. As part of this alternative, the implementation of private property LID source controls is encouraged to reduce stormwater runoff and reduce municipal capital and operating costs. Additional LID end-of-pipe stormwater management opportunities have been identified; the three types are: Type City Parks/School Playing Field Storm Outfalls to Kempenfelt Bay (Lake Simcoe) City Road Reconstruction Projects
Technology
Objective
Underground Infiltration System
Water Quality Treatment, Erosion Control and Water Balance
Mechanical Treatment Devices (Oil Grit Separators)
Water Quality Treatment
Perforated Pipe System, Turf Bioswale/Infiltration Trench (or equivalent)
Water Quality Treatment, Erosion Control and Water Balance
The additional end-of-pipe stormwater management opportunities are primarily located in City parks, with one site located on a school playing field. The specific locations are as follows:
ENGINEERING DEPARTMENT
File: D03-CO2 -3-
Comprehensive Stormwater Management Master Plan (CSWM-MP) Site ID 1 4 6 7 10 13 14 16 24 25 26 26a 29
Location Victoria Woods Park Scott Park Leacock Park Queen’s Park Patterson Place Park Golden Meadow Park Lennox Park Mapleton Park Elizabeth Place Park Cedar Grove Park Bayshore Park Walnut Crescent Open Space Johnson Street Public School
June 16, 2015
Description
Construct underground infiltration galleries during future park/school renewal projects. As the infrastructure is located underground; park/school use would not be impacted (after construction is completed). The infiltration galleries will provide water quality treatment, erosion control and improve water balance.
Alternative 3 - Combination of Traditional Stormwater Management with LID Practices This alternative is a combination of Alternative 1 (Traditional Stormwater Management) and Alternative 2 (LID Practices). This alternative provides maximum flexibility and allows full utilization of best practices for water quality treatment, erosion control, quantity control (flood protection) and water balance. This alternative includes the additional end-of-pipe stormwater management opportunities as identified in Alternative 2. The City is hosting a Public Information Centre (PIC) to solicit feedback from the public on the alternative stormwater management strategies listed above and to solicit additional background information related to stormwater management within the City of Barrie. Following the completion of the PIC and in consideration of all comments received from the review agencies and public consultation, the Preferred Alternative Solutions will be incorporated in the CSWM-MP. The final report and accompanying recommendations will then be presented to City Council for ratification. Those individuals and parties that requested to be kept informed of the Class EA process will be notified of the date that General Committee will be presented with the CSWM-MP so that deputations can be coordinated at the next scheduled Council session if required. A PDF version of the draft Phases 1 and 2 Report is available online and can be found by doing a keyword search on the City of Barrie web page (www.barrie.ca/EAStudies) and then scrolling down to the Comprehensive Stormwater Management Master Plan section. A paper copy of the Draft Class EA will be available for review at the following locations: City of Barrie Clerk’s Office st City Hall, 1 Floor 70 Collier Street Barrie, ON L4M 4T5
City of Barrie Engineering City Hall, 6th Floor 70 Collier Street Barrie, ON L4M 4T5
Barrie Public Library Downtown Information Desk 60 Worsley Street Barrie, ON L4M 1L6
Barrie Public Library Painswick Branch Information Desk 48 Dean Avenue Barrie, ON L4N 0C2
If you have any questions and/or concerns, please feel free to contact Mr. Brett Gratrix at (705) 739-4220, extension 5117, or e-mail
[email protected] Yours truly,
B. Gratrix, P. Eng. Infrastructure Planning Engineer BG/lh
ENGINEERING DEPARTMENT
File: D03-CO2 -4-
Comprehensive Stormwater Management Master Plan (CSWM-MP)
June 16, 2015
Figure 1 – Map of Study Area and Additional End-of-Pipe Stormwater Management Opportunities
COMPREHENSIVE STORMWATER MANAGEMENT MASTER PLAN MUNICIPAL CLASS ENVIRONMENTAL ASSESSMENT (CLASS EA) Public Information Centre Thursday, June 25, 2015 4:00 p.m. to 7:00 p.m. Dorian Parker Centre (227 Sunnidale Road) COMMENT SHEET Personal information on this form is collected under the authority of the Environmental Assessment Act, Chap. E18, Section 7, and will be used in the development of a Municipal Class Environmental Assessment. Questions about this collection should be directed to the Director of Engineering, P.O. Box 400, 70 Collier Street, Barrie, Ontario, L4M 4T5, (705) 726-4242. Please print all responses. NAME OF RESPONDENT:
REPRESENTING (Agency, Municipality, Property Owner, Tenant, etc.):
ADDRESS (Including Postal Code & Telephone Number): Street Address:
Unit/Apt:
Postal Code:
Telephone Number:
Email: The Corporation of the City of Barrie (City) is undertaking a Comprehensive Stormwater Management Master Plan under Phases 1 and 2 of the Municipal Class Environmental Assessment (Class EA) to consider alternative stormwater management strategies to address urbanization in existing and planned development areas pursuant to the approved procedures, as defined in the Municipal Class Environmental Assessment dated June 2000, as amended in 2007 and 2011. A copy of the draft Class EA document outlining the planning, approval, problem identification and preliminary impact assessments of the various alternatives is available for review at www.barrie.ca/EAStudies and at the following locations: City of Barrie Clerk’s Office City Hall, 1st Floor 70 Collier Street Barrie, ON L4M 4T5
City of Barrie Engineering City Hall, 6th Floor 70 Collier Street Barrie, ON L4M 4T5
Barrie Public Library Downtown Information Desk 60 Worsley Street Barrie, ON L4M 1L6
Barrie Public Library Painswick Branch Information Desk 48 Dean Avenue Barrie, ON L4N 0C2
Which of the following stormwater management alternative strategies do you feel best addresses the deficiencies of the current approach to stormwater management and mitigates the impact of urbanization on stormwater quality, flood protection, erosion control and water balance? Please rank the following Alternatives from 1 to 3 with 1 being the most preferred. Stormwater Management Alternative Strategies:
Ƒ Alternative 1 - Traditional Stormwater Management (Do Nothing) This alternative allows for the consideration of maintaining traditional stormwater management systems consisting of storm sewers and wet ponds providing water quality treatment as well as quantity (flood protection) and erosion control.
Ƒ Alternative 2 – Stormwater Management using LID Practices This alternative consists of implementing low impact development practices to utilize natural processes to provide water quality treatment and improved water balance. LID does not provide quantity control (flood protection). As part of this alternative, the implementation of private property LID source controls will need to be
ENGINEERING DEPARTMENT
-2-
File: D03-CO2
Comprehensive Stormwater Management Master Plan
June 16, 2015
encouraged to reduce stormwater runoff and reduce municipal capital and operating costs. Additional LID endof-pipe retrofit opportunities have been identified (see attached letter) for City parks and playing fields as well as storm sewer outfalls and road reconstruction projects. The specific retrofit locations in City Parks and school playing field are as follows: Retrofit ID 1 4 6 7 10 13 14 16 24 25 26 26a 29
Location
Retrofit Description
Victoria Woods Park Scott Park Leacock Park Queen’s Park Patterson Place Park Golden Meadow Park Lennox Park Mapleton Park Elizabeth Place Park Cedar Grove Park Bayshore Park Walnut Crescent Open Space Johnson Street Public School
Construct underground infiltration galleries during future park/school renewal projects. As the infrastructure is located underground; park/school use would not be impacted (after construction is completed) The infiltration galleries will provide water quality treatment, erosion control and improve water balance.
Ƒ Alternative 3 – Combination of Traditional Stormwater Management with LID Practices This alternative is a combination of Alternative 1 (Traditional Stormwater Management) and Alternative 2 (LID Practices). This alternative provides maximum flexibility and allows full utilization of best practices for water quality treatment, erosion control, quantity control (flood protection) and water balance. This alternative includes the additional end-of-pipe stormwater management opportunities as identified in Alternative 2. Please list below any specific concerns you have with the alternatives (please reference specific Retrofit ID number if applicable, feel free to add an additional page if more room is required):
Do you wish to continue to be informed of the staff recommendations for the Preferred Alternative Solution that will be presented to General Committee, as well as the publication of the Notice of Completion?
Ƒ Yes Signature:
Ƒ No Date:
Are you satisfied with the detail of the information presented herein, at the Public Information Centre, and provided on the City website (www.barrie.ca)?
Ƒ
Ƒ
Ƒ
Ƒ
Ƒ
Poor (Much Improvement Required)
Marginal (Some Improvement Required)
Good
Very Good
Excellent
Please add a comment in support of your level of satisfaction below:
______________________________________________________________________________________________________ Please submit this comment sheet by Thursday, July 9, 2015 to: Mr. Brett Gratrix, P. Eng. City of Barrie Engineering Department 70 Collier Street, P.O. Box 400 Barrie, ON L4M 4T5
Tel: Fax:
(705) 739-4220, Ext. 5117 (705) 739-4247
E-mail:
[email protected] Thank you for your comments.
WELCOME TO THE PUBLIC OPEN HOUSE for the Comprehensive Stormwater Management Master Plan
Public Open House Thursday June 25, 2015 Dorian Parker Centre 227 Sunnidale Road 4:00pm to 7:00pm
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WELCOME TO THE PUBLIC OPEN HOUSE for the Comprehensive Stormwater Management Master Plan The City of Barrie has initiated the development of a Comprehensive Stormwater Management Master Plan (CSWM-MP) in accordance with the Lake Simcoe Protection Plan, Lake Simcoe Region Conservation Authority (LSRCA) Guidelines, and the Municipal Class Environmental Assessment Process for Master Plans. The long range planning approach that is undertaken within the process will enable the City of Barrie to identify opportunities and be proactive in addressing stormwater quality/ erosion/ flooding issues before they become a problem. It will also allow the City to implement individual works which, over time, collectively become part of the stormwater management system.
Purpose of Tonight’s Meeting Tonight’s Open House will provide an opportunity for the public to review stormwater management practices and provide input on the proposed alternative stormwater management strategies and additional stormwater management opportunities within the City, the criteria for evaluation, and the selection process. The staff of the City of Barrie and the members of the Project Team are available to answer any questions that you may have about the overall study and how the project may impact you. The input from this Open House will then be used to refine the recommendations of the City of Barrie Comprehensive
Public Open House Thursday June 25, 2015 Dorian Parker Centre 227 Sunnidale Road 4:00pm to 7:00pm 2
Comprehensive Stormwater Management Master Plan
- Study Objective & Process Objective
Study Objective:
Target
Reduce phosphorus loadings to Lake Simcoe to
As per the polices of the Lake Simcoe Protection Plan, which aim to protect and revitalize the Lake Simcoe basin, municipalities are required to prepare and implement comprehensive stormwater management master plans for each settlement area in the Lake Simcoe Watershed.
44 tonnes per year, in order to achieve a target for dissolved oxygen of 7 mg/L in the lake. Water Quality
The City of Barrie is a settlement area located on the western shores of the Lake Simcoe watershed, and as such is required to prepare a Comprehensive Stormwater Management Master Plan (CSWM-MP). The development of a Comprehensive Stormwater Master Plan for the City of Barrie is an important step to meet the objectives of the Lake Simcoe Protection Plan (LSPP), specifically:
PWQO Standards
Reduce contaminants to levels that achieve Provincial Water Quality Objectives or better
Water Balance
Preserve and re -establish natural hydrologic cycle Maintain groundwater levels and baseflows
Water Quantity
Reducing loading of phosphorus and other nutrients of concern to Lake
Reduce pathogen loading to eliminate beach closures
Lake Simcoe Protection Plan Targets and
Minimize risk of flooding Reduce stream erosion impacts
prevent Infiltration deficit control 2-yr to 100-yr outflows to predevelopment rates
Simcoe and its tributaries Reducing discharge of pollutants to Lake Simcoe and its tributaries
Study Process: The study process followed the ten (10) steps presented within the LSPP and (LSRCA) Guidelines for the Development and Implementation of CSWM-MP in the Lake Simcoe Watershed.
1. Scoping 2. Determine Study Area 3. Characterization of the Study Area 4. Divide into Management Units 5. Evaluate Environmental Impacts 6. Determine Effectiveness of SWM Systems 7. Identify and Evaluate SWM Opportunities 8. Establish Recommended Approach 9. Develop Implementation Plan 10. Develop Inspection and Maintenance Programs
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Comprehensive Stormwater Management Master Plan
- Problem / Opportunity Identification -
(STEP 1)
Significant future growth and development is expected within the City of Barrie. Land use changes can have significant impacts on stormwater quantity and quality, and on the ecological health of Lake Simcoe and the Lake Simcoe Watershed. Effective management of stormwater in existing and planned settlement areas will help to protect and restore the health of Lake Simcoe and its watershed. This study provides an opportunity to identify, prioritize and implement Stormwater Management improvements to reduce nutrient and other pollutant loads in Lake Simcoe, mitigate reductions in groundwater recharge and maintain surface runoff to pre-development conditions.
What is Stormwater? Stormwater is water that flows across the land surfaces and is routed into drainage systems which ends up in our natural areas such as creeks, lakes, and wetlands.
Stormwater in Urban Areas As towns and cities expand over our undeveloped, natural areas, the amount of “permeable” or “porous” areas are reduced and replaced by hard surfaces which do not absorb stormwater. With less “porous” areas available, risks of flooding and erosion may increase.
Residential Runoff * Oil & Gas * Antifreeze * Fertilizers * Pesticides * Nutrients & Bacteria * Heavy Metals
Industrial Runoff * Oil & Gas * Industrial Waste * Cleaning Products * Paints and Solvents * Nutrients & Bacteria * Heavy Metals
Graphic Courtesy of www.scipeeps.com
How does this effect Water Quality? Untreated runoff carries oils and grease, pesticides, fertilizers, and other chemicals off roads, lawns, and buildings which go directly into our natural areas, such as creeks, lakes, and wetlands.
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Comprehensive Stormwater Management Master Plan
- Study Area / Management Units -
(STEP 2,4)
Barrie Creeks Watersheds These watersheds are located within the former City limits and are, for the most part, fully urbanized. The Barrie Creeks Watersheds unit includes: Sophia Creek, Kidd's Creek; Bunkers Creek, Dyments Creek, Hotchkiss Creek, and Whiskey Creek; and nine smaller drainage areas which flow directly to Lake Simcoe.
Annexation Lands Watersheds These watersheds are located within the newly annexed lands, where the majority of the future urban growth within the City is planned. The Annexation Lands Watersheds unit includes: Lovers Creek, Hewitts Creek, Sandy Cove Watershed; and three smaller drainage areas which flow directly to Lake Simcoe.
Existing urban development in many of these areas pre-dates modern stormwater management, and therefore stormwater runoff from these lands drains to Lake Simcoe untreated. Opportunities exist to implement new treatment practices and mechanical devices on private and public property.
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Comprehensive Stormwater Management Master Plan
- Study Area Characterization -
(STEP 3)
Characterization of Existing Conditions:
Characterization & Key Findings: In order to develop a recommended stormwater management strategy and implementation plan for the City of Barrie, the existing environmental conditions of the study area were characterized. Special focus was given to the environmental features and functions that are relevant to stormwater quantity and quality and the effectiveness of existing stormwater infrastructure.
Water Quality: Typical pollutants of Concern: Phosphorus, Chlorides, Total Suspended Solids, Metals and Bacteria. Groundwater: Much of the City is underlain by coarse sandy soils which provide an important function in infiltrating and replenishing groundwater for municipal supply. Many of the Barrie Creeks fall within Wellhead Protection Areas. Surface Water and Flood Hazards: Flood and erosion hazard lands were mapped. These areas could be impacted by changes to stormwater runoff. Natural Heritage: Significant woodlots, wetlands and streams requiring protection were mapped. Climate Change: The City is proactively addressing climate change, specifically the increasing frequency of more intense rainfall events through a 15% increase to the rainfall intensity-duration-frequency (IDF) curves used for sizing stormwater infrastructure.
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Comprehensive Stormwater Management Master Plan
- Study Area Characterization -
(STEP 3)
Drinking Water Supply Protection The City of Barrie relies on a combination of surface water from Lake Simcoe and groundwater aquifers below the City for drinking water supply. These water supplies are vulnerable to contamination by activities within the surrounding area. The vulnerable areas have been mapped as part of the Lake Simcoe and Couchiching-Black River Source Protection Area Plan, including: Wellhead protection areas (WHPA's) identify the
vulnerable areas that could lead to the contamination of the domestic water supply wells within the wells capture zone. Intake protection zones (IPZ) identify the vulnerable areas that could lead to the contamination of the surface water intake. Development or landuse changes within WHPA's or IPZ's are subject to approval by the City, LSRCA and MOE. To prevent groundwater contamination, the application of some forms of stormwater management may also be restricted within these areas.
Natural Heritage Areas The natural heritage features identified in the city of Barrie study area include significant woodlots, wetlands, and streams which need to be protected in order to maintain the ecological function and natural processes of the watershed, improve air and water quality, and provide a better quality of life for Barrie residents. The City's Natural Heritage Strategy was developed in coordination with the LSRCA. A four tiered policy approach was developed as part of the Strategy for the preservation of the natural heritage features. The city's natural heritage features were designated as: provincially significant (Policy Level 1 and 2); watershed significant (Policy Level 3); and supporting (Policy Level 4)
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Comprehensive Stormwater Management Master Plan - Environmental Impacts and Effectiveness of Existing SWM system (STEP 5 & 6)
As cities expand, the amount of “permeable” areas are reduced and replaced by hard surfaces which do not absorb rainfall. Without stormwater management, this can result in: increased runoff volumes increased pollutants to the receiving streams and lakes increased flooding and erosion decreased groundwater levels
Stormwater Quality Control in Barrie Urban Area
Rural Watershed
Total Area
&
Urban Area
(ha)
Environmental
(ha)
Area (ha) Barrie Creeks Watersheds* Annexation Lands Watersheds*
Total Study Area
Urban Area
Served by Water Without Water Quality Control
Quality
SWM Facilities**
Control**
(%)
(%)
3482.4
209.3
3273.1
8%
92%
3619.3
1763.0
1856.3
49%
51%
7101.8
1972.4
5129.4
23%
77%
* Portion of watershed within City Boundary ** Data of 2005. Does not include private facilities. A significant portion of the City of Barrie was developed prior to stormwater management regulations.
Water Quantity & Balance: Annual Infiltration Imperviousness Proposed Landuse
(mm/yr) Soil
Existing / PreDevelopment
Post-
Type
Existing / PreDevelopment
Development
PostDevelopment
Infiltration Deficit (mm/ yr)
Parkland
0%
25%
coarse AB
202
152
50
Residential
0%
50%
coarse AB
202
101
101
Institutional
0%
70%
coarse AB
202
67
141
Business
0%
80%
202
40
162
Intensification
40%
70%
121
61
62
coarse AB coarse AB
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Comprehensive Stormwater Management Master Plan - Environmental Assessment Process and Alternative Solutions -
(STEP 7)
This study is being undertaken as a Master Plan (Approach 1) project under the Municipal Class Environmental Assessment (EA) process. The flow chart illustrates the key steps in the EA process.
Identify Problem or Opportunity
Identify Alternative Solutions
Evaluate Alternative Solutions
Consult on Recommended Solution(s)
Select Preferred Solution(s)
Complete Final Report (30 Day Review Period)
We Are Here
EA Project Schedules Projects undertaken by municipalities are assigned to various project schedules according to their anticipated level of environmental impact: Schedule A projects are limited in scale and have minimal adverse environmental effects. These projects are pre
approved and include a number of municipal maintenance and operational activities. Schedule A+ projects are pre-approved, however, the public is to be advised prior to project implementation. Schedule B projects have the potential for some adverse environmental effects and require public consultation.
These projects generally include improvements and minor expansions to existing facilities. Schedule C projects have the potential for significant environmental effects and require public consultation. These
projects generally include the construction of new facilities and major expansions to existing facilities.
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Comprehensive Stormwater Management Master Plan
- Alternative Solutions -
(STEP 7)
Alternative 1: Traditional Stormwater Management (Do Nothing) This alternative allows for the consideration of maintaining traditional stormwater management systems, consisting of conventional storm sewers and stormwater detention ponds to provide water quality treatment as well as flood and erosion control applications.
Stormwater Conveyance Traditional stormwater systems use conventional underground sewer pipes to convey stormwater runoff. This approach focuses on moving stormwater as quickly as possible from where it was generated to a traditional end-of-pipe treatment area, such as a detention pond, before being discharged to the receiving streams and lakes.
Traditional End-of-Pipe Stormwater Facilities Traditional end-of-pipe treatment typically consists of a detention pond where stormwater is collected. The ponds are constructed with sufficient capacity to settle many pollutants and to hold back the runoff for flooding and erosion control. For instances where stormwater treatment is achieved through other mechanical devices or upstream treatment methods, the pond may be constructed such that it is dry between storm events.
Alternative 2: Low Impact Development (LID) Stormwater Measures This alternative consists of using LID practices to encourage the infiltration of water into the ground and reduce stormwater runoff. These natural processes improve the hydrologic water balance, and provide water quality treatment. LID does not typically provide flood protection for major storm events. As part of this alternative, the implementation of source controls is encouraged to reduce stormwater runoff and reduce municipal operating costs. Additional non-traditional end-of-pipe stormwater opportunities have also been identified. LID measures, for the purposes of this study, have been divided into the following categories:
Pollution Prevention Measures These are methods that have the intent to improve operation and maintenance of privately and publicly owned land, buildings, and infrastructure that will reduce pollution generation. Certain municipal programs such as road salt management, street sweeping and storm sewer cleaning can affect water quality. Pollution prevention measures are classified as Schedule A projects.
Source Control Measures Source controls are physical measures that encourage the infiltration of water into the ground and reduce stormwater runoff and can included LID techniques such as green roofs, permeable pavement, soakaway pits, bioretention, rainwater harvesting and downspout disconnection etc. Source control measures are classified as Schedule A projects.
Conveyance Control Measures Conveyance controls are linear stormwater transport systems that are generally located within the road right-of-way and encourage infiltration of water into ground, improve water quality and reduce runoff. They can include traditional curb and gutter systems and low impact development (LID) techniques such as, bio-swales, grassed channels and subsurface perforated pipe systems. Conveyance control measures are typically undertaken as part of roads improvement works and are therefore classified according to the EA Schedule for the roads project.
End-of-Pipe Measures Additional opportunities to construct end-of-pipe treatment measures in areas of the city which currently have no stormwater controls were investigated. This assessment focussed on opportunities to construct non-traditional underground infiltration galleries within public lands, as well as additional opportunities to provide mechanical treatment at uncontrolled outfalls to Lake Simcoe. End-of-pipe controls are classified as Schedule A+ or B projects. SEE INFORMATION PANELS AFTER EVALUATION TABLE FOR FURTHER INFORMATION
Alternative 3: Traditional Stormwater Management and LID Stormwater Measures This alternative is a combination of Alternative 1 (Traditional Stormwater Management) and Alternative 2 (LID Stormwater Measures).
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Comprehensive Stormwater Management Master Plan
- Evaluation of Alternative Solutions -
(STEP 7)
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Comprehensive Stormwater Management Master Plan - Alternatives - Cost Estimates and Present Funding Stormwater Management Alternatives
Components
Present Funding Sources and Costs (if applicable)
(STEP 7)
Additional Cost as Compared to Traditional SWM (Draft)
Stormwater Management for New Roads/Road Widenings Annexed Lands – 85% DC, 15% Taxes Former City Boundary – 65% DC, 35% Taxes
Alternative 1 – Traditional Stormwater Management
City Stormwater Management Infrastructure
Stormwater Management for Road Renewal 100% Taxes Stormwater Conveyance System and End -of-Pipe Facility Maintenance 100% taxes
28 Identified Stormwater Facility Pond Retrofit 1 $14.0 Million
Stormwater Management Facility Pond Retrofits 1 100% DC - $14 Million
Public Outreach/Education/Marketing: $0.2 Million Source Control Measures Costs borne by property owner
Pilot Projects: $0.2 Million The provided implementation costs are estimates only. Actual costs can vary depending on the complexity and/or available/suitable land available for implementation.
LID Retrofits for New Roads/Road Widenings Annexed Lands – 85% DC, 15% Taxes Former City Boundary – 65% DC, 35% Taxes The additional cost increase for LID is not included in the 2014 DC By-Law. Proposed to be added as part of next DC By -Law update. Alternative 2 – Low Impact Development (LID) Stormwater Measures
City Stormwater Management Infrastructure
$13.0 Million (approx $400/m of roadway)
Potential funding opportunities include: Phosphorus Offsetting Programs
LID Retrofits for Road Renewal 100% Taxes Potential funding opportunities include: Phosphorus Offsetting Programs Additional Stormwater Management Opportunities (Infiltration Galleries in Parks, OGS at Lake outfalls) Additional costs are not included in the 2014 DC By -Law. Potential funding opportunities include: Taxes Development Charges Phosphorus Offsetting Programs Federal/Provincial/LSRCA Grants
Alternative 3 – Traditional Stormwater Management with LID Measures
Stream Restoration
See Alternatives 1 and 2 above
City Stormwater Management Infrastructure
See Alternatives 1 and 2 above
Costs will vary dependent on type of LID implemented.
Infiltration Galleries in Parks = $7.6 Million OGS’s at Lake outfalls = $10.1 Million
Total = $17.7 Million
Total of Alternatives 1 and 2 above = $45.1 Million
Stream Rehabilitation 100% Taxes (DC eligible for specific projects affected by development) Potential funding opportunities include: Taxes Development Charges Phosphorus Offsetting Programs Federal/Provincial/LSRCA Grants
$14.4 Million
1As
identified in the Infrastructure Master Plans (AMEC, 2013) DC = development charges LSRCA = Lake Simcoe Region Conservation Authority ICI = Industrial, Commercial and Institutional Phosphorus Offsetting Programs are in the development stage with the Lake Simcoe Region Conservation Authority. This program
is proposing to establish a fund that the City can use to implement phosphorus reducing projects within the Lake Simcoe Watershe d.
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 1: Traditional Stormwater Management -(STEP 7) The City, as part of the Intensification and Annexation Land Background Studies, identified opportunities to provide water quality control by retrofitting the existing stormwater network with a series of traditional stormwater ponds The previous study identified 74 potential existing SWM pond and storm outfall sites. Of these (located within the Lake Simcoe watershed): -11 existing SWM ponds are recommended to be retrofitted -17 existing storm sewer outfall sites were identified where new SWM ponds are recommended.
The retrofit of a dry stormwater detention facility (left) to a wet stormwater management facility (right). The pond on the right provides additional water quality and erosion control benefits. (City of Barrie,LV14)
The addition of new SWM ponds at existing uncontrolled storm sewer outfalls
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 1: Traditional Stormwater Management Existing Pond Retrofit Opportunities (STEP 8) The following retrofit opportunities were identified as part of the Infrastructure Master Plans and have been approved by Council. The retrofits identified on this map focused on the following opportunities: ? converting dry ponds to wet ponds (provides stormwater quality treatment) ? constructing ponds at storm outfalls (where land is available) ? developing online opportunites (converting stream channels into ponds)
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 2: Low Impact Development (LID) Stormwater Measures Pollution Prevention Measures (STEP 7) Pollution Prevention Current City Practices include: Reduced road salt application through Salt Management Measures and Operator training Catch basin and storm sewer cleaning Source Water Protection (Public Outreach/Education and Re-evaluation of Industrial, Commercial and Institutional Activities Hazardous Product Management at City Facilities Septic System Maintenance Sewer Use By-Laws Installations of Mechanical stormwater treatment devices where feasible Street sweeping free household hazardous waste dropoff
Additional measures which are proposed to augment current City practices may include: Requirement for Salt Management Plans and Training for ICI properites Public Education, and business awareness (Yellowfish Road Program) Reduced lot grading Lawn Care Education Programs (Proper Fertilizer Use)
Spills Controls / Hazardous Product
Public Education/Awareness
Awareness
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 2: Low Impact Development (LID) Stormwater Measures Source Control (STEP 7) Examples / Opportunities Source control measures are generally implemented on private properties. Typical stormwater techniques that are currently throughout the city were reviewed, with an emphasis on single-family residential lots. Example practices and opportunities are illustrated below.
Downspout Disconnection
Rain Barrel
Residential Downspout Disconnection Opportunities Rain Garden / Enhanced Yard Vegetation
Permeable Pavement
Soakaway Pit/ French Drain Retrofit - During and After (L to R)
GreenRoof
The City and the Lake Simcoe Region Conservation Authority (LSRCA)’s Role The City's role in implementing stormwater source controls is to improve uptake rates of its residents and industry through social marketing programs and strategies. Existing Programs include: Barrie's Rain Barrel program LSRCA RainScaping RAIN Stormwater Management Program LSRCA LEAP (Landowner Environmental Assistance Program) TRCA Greening Your Grounds – A Homeowners Guide to Stormwater Landscaping Projects Special Events such as CVC's “Ask A Designer Night”
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 2: Low Impact Development (LID) Stormwater Measures Conveyance Control (STEP 7) Conveyance controls are measures that are designed to treat stormwater as it travels overland or through pipes to the downstream outlet. Low Impact Development (LID) conveyance control methods include: Exfiltration trenches / perforated pipe systems; Grassed swales; Bioretention / bioswales; Permeable pavements and Mechanical treatment devices.
The LSPP recommends that municipalities “make stormwater retrofits and the use of LID solutions a priority, due to their significant potential to reduce phosphorus loadings”. The City plans to promote their use in new development areas and within existing development areas (retrofits). Roads improvement projects represent the most efficient way to implement these controls into existing areas. Opportunities to include these controls as part of future City roads improvement projects were reviewed: The City's 5-year Capital Budget for Road infrastructure Roads within wellhead protection areas (WHPAs) A-C were excluded General alternatives for rural (ditched) and urban (curb and gutter) road sections were reviewed Estimated pollutant loadings reductions were calculated
Example Low Impact Development (LID) Retrofit Techniques
Existing Condition “Rural” Road Retrofit Example (Royal Oak Drive Neighbourhood)
Existing Condition “Urban” Road Retrofit Example (Toronto St.)
LID Retrofit Option Granular Infiltration Trench (Mississauga, ON)
LID Retrofit Option Perforated Pipe System (Lower pipe is perforated allowing stormwater to exfiltrate into soils)
Finished Project and Appearance Turf Bioswale on Top of Granular Infiltration Trench
Finished Project and Appearance (Toronto, ON)
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 2: Low Impact Development (LID) Stormwater Measures Additional Stormwater Management Opportunities -(STEP 7) Additional opportunities were reviewed as part of the CSWMMP to implement underground water
quality treatment in existing parks and municipally-owned lands. A typical example is shown below.
Typical areas suitable for underground Once constructed, the playing field is restored infiltration systems. After construction, the to its previous use. Source: Google Maps areas are restored to their original use. Construction can be scheduled to minimize impacts to playing field activities (i.e. This image illustrates a typical installation of an underground winter/early spring construction). infiltration gallery. The yellow arch structures are connected to the Source: Google Maps storm sewer and provide storage in addition to the clear stone backfill allowing for further storage of stormwater in the voids between the stone. As stormwater enters this system it naturally infiltrates into the ground helping to replenish groundwater and reduce runoff to receiving streams. Source: www.Corix.com, Photo of ADS Stormtech Chamber (Alberta)
Additional Opportunities to add mechanical treatment devices, called oil-grit separators (OGSs)
were reviewed as part of this CSWM-MP study. These devices could be added to uncontrolled outfalls to Lake Simcoe or as part of future road re-construction projects.
Outfall to Kempenfelt Bay
Oil-Grit Separator
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Comprehensive Stormwater Management Master Plan Alternative Details - Alternative 2: Low Impact Development (LID) Stormwater Measures Additional Stormwater Management Opportunities -(STEP 7)
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Comprehensive Stormwater Management Master Plan - Alternative 3: Traditional Stormwater Management and LID Stormwater Measures (STEP 8)
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Comprehensive Stormwater Management Master Plan
- Stream Restoration Works -
(STEP 7)
Stream Restoration Measures The City of Barrie and LSRCA have mapped known erosion sites within the Study Area. 48 erosion sites have been documented. Stream erosion and problem site restoration measures are recommended to be addressed through the completion of a future City Wide Stream Restoration Master Plan. The city-wide study would be undertaken following the Municipal Class EA process and would result in a prioritized plan for undertaking future stream works.
Future City Wide Stream Restoration Master Plan.
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Comprehensive Stormwater Management Master Plan
- Next Steps & Contact Information Next Steps The following next steps will be undertaken to complete the City of Barrie Comprehensive Stormwater Management Master Plan: Review Public Consultation Feedback and Comments Finalize Evaluation of Proposed Alternatives (STEP 7) ? Refinement of Study Recommendations (STEP 8) ? Develop an Implementation Plan (STEP 9) Draft Final Report Public who wish to be kept informred of the preferred alternative will be mailed a notice including identification of the preferred alternative and timing of the Staff Report that will be submitted to General Committee and City Council. Pending approval, a Notice of Completion will be advertised providing a 30-day review period as per the Municipal Class Environmental Assessment Process
Brett Gratrix, P.Eng. Infrastructure Planning Engineer The City of Barrie Tel: 705-739-4220 ext. 5117 Email:
[email protected]
Thank You for Participating
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