Stormwater Charge and Credit Program Multi-Residential Credit Program Seminar December 7th, 2015

Dr. Victoria Kramkowski Stormwater Charge Program Coordinator Transportation & Works Department

Stormwater in Mississauga Why is the City introducing a Stormwater Charge?

Mississauga's stormwater infrastructure has a current

replacement value of $1.9 billion

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200km of waterways

2000km of storm sewers

Photo Credit: Aaron Volkening

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1000 outlets

57 SWM ponds

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250km of ditches and swales

51,000 catch basins

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Increased investment is needed to maintain level of service and

state of good repair

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Flood mitigation

Erosion control 8

Replace aging pipes

SWM pond clean-outs 9

Water quality control

By-law enforcement and spill response

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Changing climate, changing storms 11

User fees are a fair and dedicated way to fund this essential service

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Stormwater Charges How are charges assessed and applied?

Stormwater Charge Calculation

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Stormwater Charge

Assessment (billing units)

Stormwater Rate

($/billing unit)

Stormwater Charge

($)

Assessment: Residential Properties

Tier Billing Units

Smallest 0.5

Small 0.7

Medium 1.0

Large 1.2

Largest 1.7

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REPLACE

Assessment: Multi-Residential and Non- Residential Properties

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• Impervious (hard) surface area of property individually assessed

• 1.0 Billing Unit per 267m2 (2,874 sq. ft.) of hard surface area

• Charge will appear on Peel water bill or storm-water only bill

Stormwater Estimator Look up your property at www.stormwatercharge.ca

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Stormwater Credits How are on-site stormwater works considered?

Established Principles • Credits will reward

stormwater Best Management Practices (BMPs) providing direct City-wide benefits

• Credit amounts will be proportional to the benefit received by City’s stormwater program

Usually on Private

Property

May occur on Private Property or

Public System

Usually in Public System

Original Public System

Low Impact Development and

Emerging Practices

Traditional Infrastructure and

Watercourses

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Image Credit: Grand Valley State Univresity (www.gvsu.edu/stormwater)

Permeable Not Permeable

Permeable Pavement

Bioswales

Underground Detention Facility

Green Roofs

Program Basics • Multi-Residential and Non-Residential properties

are eligible

• Maximum credit is 50%

• Credits effective for 5-year, renewable terms

• Applications are accepted for existing or proposed stormwater BMPs

• Program provides flexibility to property owners in the BMP types they implement

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Application Package

• All application packages to consist of: – Completed application form – Supporting documentation, certified by

qualified P.Eng.

• May submit online, by mail, or in person

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Application Form and Manual available at www.stormwatercharge.ca

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Application Types

• New Credit – First time credit for existing or

proposed works

• Credit Update – Update credit amount to reflect

changes to stormwater BMPs

• Credit Renewal – Approved credit about to be or

recently expired

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Focused on how BMPs meet credit criteria

Focused on how BMPs remain in state of good repair

Review Process (Existing BMP)

• Step 1: Screen application for completeness • Step 2: Technical review

– Response to Applicant within 30 days – Site visit may be required – Reviewer may have comments for Applicant to

address

• Step 3: Decision on credit approval • Step 4: Credit made effective on account

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Review Process (Proposed BMP)

• Step 1: Screen application for completeness • Step 2: Technical review • Step 3: Decision on pre-approval • Step 4: Applicant submits certification that

BMPs are constructed and operational • Step 5: Review and decision • Step 6: Credit made effective on account

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Credit Schedule

Category Evaluation Criteria Weighting

Peak Flow Reduction

Percent reduction of the 100-year post-development flow to pre-development conditions of the site

Up to 40%

Total No M

ore than 50%

Water Quality

Treatment

Consistent with Provincial criteria for enhanced treatment Up to 10%

Runoff Volume

Reduction

Percent capture of first 15 mm of rainfall during a single rainfall event Up to 15%

Pollution Prevention

Develop and implement a pollution prevention plan Up to 5%

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Peak Flow Reduction (up to 40%)

• For full credit: Control 100-year post-development flow to 100-year pre-development rate from entire impervious surface area(s) of site

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Fraction of Target

Met 40% Credit

Amount

Water Quality Treatment (up to 10%)

• For full credit: Direct all impervious areas of site to an on-site BMP meeting criteria for water quality

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Fraction of Impervious

Areas Serviced

10% Credit Amount

Runoff Volume Reduction (up to 15%)

• For full credit: First 15mm of rainfall landing on all impervious areas of site during a single rainfall event is captured

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Each mm of rainfall captured

1% Credit Amount

Pollution Prevention Plan (up to 5%)

• For full credit: Pollution Prevention Plan satisfies criteria set out in Schedule ‘A’ of the City’s Storm Sewer By-law 259-05 and is fully implemented

Percent of Pollution Prevention Plan Implemented

Credit Amount

40% 2%

60% 3%

80% 4%

100% 5% 31

Terms and Conditions

• Standard terms and conditions of approval – May also be site specific

• Expectations for operation, inspection and maintenance of BMPs – Logs to be kept by Applicant/Owner for

compliance inspection and/or credit renewal

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Effective Dates for Approved Credits

• Applications received in 2016 will be retroactive to January 1st, 2016 or when BMP measures were implemented, whichever is later

• Applications received from 2017 onwards will be retroactive to date application is deemed complete or when BMP measures were implemented, whichever is later

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Thank You Visit www.stormwatercharge.ca • Charge Estimator • Reports and Policies • Request for Review of Stormwater Charge Assessment • Credit Program • More Information

Contact us at stormwater@mississauga.ca