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Maine Stormwater Conference
November 17, 2015
Ken Moraff
EPA New England
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Milwaukee, WI
• Stormwater park – recreation
• Mitigates flooding up to 100 year storm
• Reclaimed brownfield
Menomonee River Stormwater Park
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Roof on EPA Narragansett Lab
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Rain gardens
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Burnsville, MNNeighborhood Rain Garden Project
10
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Results of Burnsville Rain Gardens
Barr Engineering
Blue: Runoff from control neighborhood
Red: Runoff from neighborhood retrofitted with rain gardens
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5 MPH reduction in average traffic speed
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Kansas City, MO
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What Do We Do About Stormwater?
Goal: Incremental progress
• Tight budgets• Uncertainty about GI• Big changes are expensive – public won’t support
Strategy:• Stick with 6 minimum controls – proven practices• Steps toward LID – but don’t rush to retrofit
• We can have clean water• We can reduce flood risk• Water can improve our communities
Strategy: • Start planning for a truly “green” stormwater system
• Long schedules, adaptive management
Goal: Clean water, green communities
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Extreme storms: 1947 - 2011
NEW HAMPSHIRE 115%
RHODE ISLAND 90%
VERMONT 84%
MASSACHUSETTS 81%
MAINE 74%
CONNECTICUT 73%
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What Do We Do About Stormwater?
Goal: Incremental progress
• Tight budgets• Uncertainty about GI• Big changes are expensive – public won’t support
Strategy:• Stick with 6 minimum controls – proven practices• Steps toward LID – but don’t rush to retrofit
• We can have clean water• We can reduce flood risk• Water can improve our communities
Strategy: • Start planning for a truly “green” stormwater system
• Long schedules, adaptive management
Goal: Clean water, green communities
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Stormwater Public Outreach
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Soak Up the Rain
WebsiteToolsSocial mediaGrantsWorkshopsEventsCollaboration
Boston Living Roof Bus Shelter Initiative
Boston Flower & Garden Show
Rain Garden TrainingHartford, CT
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Region 1 - GI Technical Assistance Projects
• Cape Cod ($75k) to identify GI projects to reduce nitrogen loading
• Franklin, MA ($55k) to develop a Green Stormwater Infrastructure Implementation Strategy
• Sanford, ME($40k) to redesign former mill using green infrastructure to revitalize the Mousam River as a recreational, ecological and economic asset
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Series of Municipal Handbooks
• Funding Options• Retrofit Policies • Green Streets • Rainwater Harvesting
Policies• Incentive Mechanisms
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Email to: [email protected]
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EXISTING RESOURCES: THE NATIONAL STORMWATER CALCULATOR
Available at:http://www.epa.gov/research/gems/stormwater.htm
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Application: Redevelopment Plan for Spartanburg, SC
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Conceptual Design of Green Streets:
Spartanburg, SC (EPA Green Infrastructure Technical Assistance)
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Spartanburg, SC:Typical Section view of green street concept plan with street planters
Project Documentation:http://water.epa.gov/infrastructure/greeninfrastructure/upload/Spartanburg_Tech_Assistance1.pdf
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Spartanburg, SC Green Street Design
Scenario
Runoff Infiltration EvapotranspirationBaseline 84% 5% 11%
Scenario 1
(Street Planters)
18% 67% 15%
Scenario 2
(Pervious Pavement)
17% 75% 8%
Hydrologic results from EPA Stormwater Calculator
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GIWiz Structure• Quick Links • Explore
44
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GITARGreen Infrastructure Tools & Resources Database
FIND WHAT YOU NEED TO MAKE THE RIGHT DECISION
PlannerJustify Budget
Economic Benefits: $
Value
Microsoft Excel
Maine
Who are you?
What do you need?
How do you need it?
What do you know?
Where are you?
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Resilience and Adaptation in New EnglandRAINE Database
• 100 New England towns, regions, states
• 300 documents• Search impacts, plan or
product, funding, partners
• Available December 2015
Example: Search on Sea Level Rise
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47
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Year 0-5
Year 6-10
Year 11-15
Year 16-20
Plan Phase 2
Plan Phase 3
Implement Phase 3
Implement Phase 2
Plan Phase 1
Implement Phase 1 25% complete
50% complete
100% complete
Charles River implementation plan
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Optimizing BMP Locations Saves a Lot of Money
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MAINE’S SWUs• Lewiston• S. Portland/Long
Creek• Bangor• Augusta
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“Residual Designation” of new permittees
EPA or state with approved NPDES program can designation new categories of dischargers needing stormwater permits
• If needed to meet TMDL allocations
• If discharges contribute to water quality violation
• If discharges are a “significant contributor” of pollutants
CWA § 402(p)(2)(E), 40 CFR 122.26
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Impervious Cover Treated: 11 acresProject Cost: $700,818
2010 – 2011 Long Creek Update – Cumberland County Soil & Water Conservation District
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“To be effective in having the greatest benefit on the watershed, the proposed NPDESprogram must treat all of the causes of the stress equally, and not result in one sector ortype of Owner in having to bear an inordinate amount of the responsibility or cost in the long term improvements. Whether the impervious cover is related to a shopping center, a public or Private roadway, or a municipal complex, all of the responsible parties must bear a proportional share of the costs…”
General Growth Properties - Maine Mall, LLC comments on Long Creek residual designation
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1. https://www.flickr.com/photos/boston_public_library/2381275695/in/album-72157604353954230/2. https://www.flickr.com/photos/foodchic/4343640583/in/photolist-7BQi1T-6aTqru-bzuzxw-7KYgsY-
3Ppx6E-ovzEMN-2msQEm-7M9CCC-8rWd3p-8GrFkP-6iEjQC-7A68de-gUQJEe-9sP3WW-2Mina-rFiLWJ-r7rVZL-wyEr42-qim216-x6b6Ut-roUcRk-xuxhzF-3yn439-5D6F1E-xWpVZF-vRBrsk-rUjJbK-xcS3aq-ryZYn4-rsCViW-vVWehh-xh9m5j-dFeBaW-8GX1ZF-i6yPvN-ry9qTv-rp2cCK-rpXDBC-xnzvxZ-7dRqww-3gFkX8-ryfkqZ-x2fv99-roYEVr-bqMDYC-wtoWKQ-rqA2Le-6Ar2Uj-avSjNh-6TKX3j/
3. http://www.flickr.com/photos/chefmattrock/4780312471/4. https://www.flickr.com/photos/boston_public_library/2381277247/in/album-72157604353954230/