Stormwater Management Using State Revolving Funds
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Transcript of Stormwater Management Using State Revolving Funds
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Vicki M. Putala, P.E.Environmental and Water Resources Director
ohmohm--advisors.com advisors.com 888.522.6711888.522.6711
Using SRF Loans for Stormwater BMP Improvements
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• Value of Stormwater BMPs
• Common Types of Stormwater BMPs
• Example Nonpoint Source SRF Projects• Allens Creek Pioneer High School• Auburn Hills City Retrofit • Auburn Hills Galloway Creek
• Maintenance Considerations
• Funding Stormwater BMPs
• Tips for Moving Forward
PresentationOverview
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A BMP is a technique, process, activity or structure used to reduce the pollutant content of a stormwater discharge.
BMPs include structural modifications, such as the installation of bioretention. BMPs are most effective when used in combination with each other, and customized to meet specific needs.
BMPs may also include simple nonstructural methods, such as good housekeeping and preventive maintenance.
EPA’s Definition of a Stormwater BMP
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• Reduces nonpoint source pollution
• Helps permittees comply with National Pollution Discharge Elimination System (NPDES) requirements
• Helps Meet Total Maximum Daily Load (TMDL) Objectives in Streams
• Improves Base Flow in Streams and Reduces Flashy Hydrology
Value of Stormwater BMPs
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VegetatedBioretention (aka rain gardens)BioswalesBioinfiltration trenchNaturalized stormwater areasPlanter boxes
Structural Underground detentionHydrodynamic separation (aka grit chamber)
Water ReuseCisternsRain barrels
Porous SurfacesPorous paversPorous asphaltPorous concrete
Common Types of BMPs
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Bioretention/Rain Garden
Bio
swal
e
Vegetated BMPs
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Vegetated BMPs
Planter Box
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Und
ergr
ound
Det
entio
n
Hyd
rody
nam
ic
Sepa
ratio
n
Structural BMPs
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Cistern
Rain Barrel
Water Reuse BMPs
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Ston
e Pa
vers
Grass PaversAsphalt
Concrete
Porous Surface BMPs
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The project plan was originally submitted in 2008
•Five sites were identified for stormwater BMPs•Three road reconstruction and two retrofits
An amendment was submitted in 2009•Seven sites were identified for stormwater BMPs•Five road reconstruction and two site retrofits
Allens Creek Project Plan
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Allens Creek Project Plan2009 SRF Project Location
2008 SRF Project Location
Future Project Location
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Contributing Area: 308 acres (Allens Creek watershed 3,360 acres)
Location: City of Ann Arbor
County Jurisdiction: Washtenaw County Water Resources Commissioner – Janis Bobrin
Stakeholders: Washtenaw County, City of Ann Arbor, Ann Arbor Public Schools, Allens Creek Advisory Group & City residents
Example #1: Pioneer High School
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•Project Goal: Reduce total suspended solids, phosphorus and E.coli
•Two large underground detention basins with infiltration
– 256,000 cubic feet of storage– 10% of stored volume infiltrated
•Hydrodynamic Separators (aka grit chambers)
Example #1: Pioneer High School
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• Design Complete
• Bidding – Now
• Construction 2009 – 2010
Example #1: Pioneer High School
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Location: City of Auburn Hills
Stakeholders: City of Auburn Hills and the Clinton River Watershed Council
Project Oversight: Shawn Keenan – Stormwater Coordinator (City of Auburn Hills)
BMP Types: Rain gardens, water reuse cisterns, planter boxes, vegetated filter strip, infiltration trench and bioswale
Example #2: City Retrofits
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Several site retrofit projects underway
Retrofit Locations•Civic Center•Fire Station #3•Riverside Park•Riverwoods Park
Construction•Fall 2009
Example #2: City Retrofits
Civic Center(City Hall)
Riverside Park
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• Design Complete
• Bidding – Now
• Construction 2009
• BMPs – cistern, rain garden
Example #2: City Retrofits –Civic Center(Field House)
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• Design Complete
• Bidding – Now
• Construction 2009
• BMPs – planter boxes, rain garden
Example #2: City Retrofits –Civic Center (City Hall)
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• Design Complete
• Bidding – Now
Example #2: City Retrofits –Fire Station #3
• Construction 2009
• BMPs – rain garden
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• Design Complete
• Bidding – Now
Example #2: City Retrofits –Riverside Park
• Construction 2009
• BMPs – infiltration trench, vegetated filter strip
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• Design Complete
• Bidding – Now
Example #2: City Retrofits –Riverwoods Park
• Construction 2009
• BMPs – bioswale and rain garden
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Location: City of Auburn Hills
Stakeholders: City of Auburn Hills and the Clinton River Watershed Council
Project Oversight: Shawn Keenan – Stormwater Coordinator (City of Auburn Hills)
BMP Types: Streambank stabilization, vegetative buffer and naturalized stormwater detention areas
Example #3: Galloway Creek
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• Design Complete
• Bidding – Now
• Construction 2009/2010
• BMPs – vegetative buffer, naturalized stormwater areas
Example #3: Galloway Creek
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Bioretention/Rain Gardens– Biannual weeding– Refresh plantings (if necessary)
Porous concrete/asphalt– Annual vacuum sweeping
Underground Detention/Hydrodynamic Separation– Annual inspection and vactoring
Maintenance Considerations
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Allens Creek Drainage District is made up of three entities: City of Ann Arbor, MDOT and Washtenaw County. The City’s share of the loan is paid from an existing stormwater utility fee.
City of Auburn Hills will pay back the loan through their General Fund.
Funding Stormwater BMPs
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Find partners and build a team– Local schools– Watershed groups– Neighborhood groups– Local businesses and /or developers
Determine opportune locations within your community– Make use of all spatial data (GIS data)– Consider upcoming capital improvements projects or
redevelopment
Identify regional alternatives or site specific– Consider large scale or suites of BMPs
Tips for Moving Forward
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Gentle/Flat Slopes for Porous Pavement– Should be less than 5%
Low/moderate Traffic Volumes– Porous surfaces work best on low volume roads and/or parking
areas
Infiltrating Soils– Preferably NRCS hydrologic groups A, B or C– When poor soils exist (group D) soil amendments and underdrains
may be necessary
Salt and Sand Usage– Vegetated BMPs must be planted with salt torrent species when
receiving road runoff– Sand usage is discouraged on porous roadways due to increased
potential for void space clogging
Tips for Moving Forward
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Eligibility Criteria– Must meet goals identified in a state approved watershed
management plan (CMI or 319)– Must achieve nonpoint source pollution reduction
Public Involvement
SRF application through Project Plan (due annually by July 1st)
– Project Plan can identify proposed and future projects
– Work with MDEQ early in planning phase especially in determiningproject eligibility
– Project Plan must quantify pollution reduction and resulting cost-benefit analysis is helpful in prioritizing projects
Tips for Moving Forward
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Vicki M. Putala, [email protected]
Orchard, Hiltz & McCliment, Inc34000 Plymouth RoadLivonia, MI 48150www.ohm-advisors.com888-522-6711
Questions?