Betterton Stormwater Management Retrofit – Main Street Outfall Phase 1
Location Betterton, MD
Client Town of Betterton
Size 33.69 acre watershed
Costs $315,050
Date of Completion 2018
Services #Civil / Site Engineering #Construction Services
Sectors #Coastal Resiliency #Environmental #Government #Infrastructure #Stormwater Management #Sustainable Site Design
As part of the Town of Betterton and Kent County’s long-term goal to eliminate all untreated non-point source stormwater runoff, GMB designed and provided construction services on behalf of the Town of Betterton for a Stormwater Management retrofit project focused on improving stormwater quality at the Betterton Beach Stormwater outfall. Betterton Beach is located on the Chesapeake Bay at the mouth of the Sassafras River and previously had no stormwater management best management practices (BMPs) within the 33.69 acres of developed watershed (6.21 impervious acres).
Phase 1 of the project focused on providing water quality treatment from the Main Street Outfall and Parking Lot which collects runoff from 12.69 Acres total (3.49 Acres impervious) within the overall 33.69-acre watershed. Phase 1 Stormwater BMP retrofits included a bioretention area along Main Street in front of Town Hall, a step-pool conveyance system at the Maryland State Highway (SHA) outfall behind homes that front Main Street, Permeable pavers at the Betterton Beach parking lot, and submerged gravel wetland at the Betterton Beach parking lot. These retrofit BMP installations will result in an estimated 88.93 lbs. of Nitrogen, 7.52 lbs. of Phosphorous, and 4,100 lbs. of Total Suspended Solids being removed from stormwater runoff annually prior to discharge to the Chesapeake Bay.
BMP installation has begun to substantially improve runoff water quality from developed areas of the Town that drain to the public beach swimming area, marina, and the Chesapeake Bay, and improve conditions for the many types of fish who spawn in the upper Chesapeake. Furthermore, the project assisted Kent County in meeting their Watershed Implementation Plan (WIP) goals.
GMB worked with the Town of Betterton, Kent County, the State of Maryland Department of Natural Resources (DNR) Chesapeake & Atlantic Bay Trust, and the National Fish and Wildlife Foundation (NFWF) to secure funding for design, provide design, obtain required permits, coordinate the contract and bidding services, as well as providing Contract Administration and Inspection Services throughout the construction which was completed in July 2018.
