Total
Project Value: $500,000
Timeline: Phase 1: Culvert replacement completed (2003)
Phase 2: Re-vegetation, erosion repair and
stormwater treatment completed 2005
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Projects - Dorset Street Stormwater Treatment, Streambank Revegetation,
and Culvert Replacement
Location
Dorset Street crossing under I-89
Problem
An undersized culvert and lack of treatment of
highway-related stormwater runoff was causing a change in
the flow of water and deposit of sediment in the main stem of
Potash Brook.
Description
- Replace an undersized culvert with one that allows peak
stream flows to move through without causing flooding or
erosion problems
- Replant the streambanks in a natural design that will
prevent erosion and provide streambank habitat
- Repair eroded channels that are leading to sediment deposit
in the stream
- Provide natural stormwater treatment through wetland
filtering and bank stabilization
Benefit
This multi-part project will improve all aspects of water
quality, hydrology and stream channel quality at this critical
point on the main stem of Potash Brook.
Technical Advisors
Vermont Agency of Transportation; DuBois & King;
Winooski Natural Resource Conservation District (NRCD)
Acknowledgements
USDA – Winooski Natural Resource Conservation District
Office of U.S. Senator Patrick Leahy
Vermont Agency of Transportation
Funding Sources
South Burlington Public Works; Vermont Agency of Transportation Bridge & Culvert Grant (culvert);
USDA Natural Resources Conservation Service funding secured by U.S. Senator Patrick Leahy
(re-vegetation, erosion repair & stormwater management)
Best Management Practices
Wetland Basin
Wetland Channel
Biofilter (plant-based treatment)
Culvert replacement
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