Nash Run Stream Restoration Grantee
District of Columbia Department of the Environment
Located in northeast Washington, DC, Nash Run is a first-order tributary of the Anacostia River. The headwaters of the stream are located in Prince George’s County, Maryland, but 75% of the watershed is within the borders of the District. The stream is piped beginning in Prince George’s County and outfalls east of Kenilworth Avenue in North East DC. The Nash Run sewer shed encompasses a 229-acre area in the District, 112 acres of which is impervious.
The Nash Run watershed, and its consequent imperviousness, produce conditions for flashy and intense stream channel flows, even during the most moderate of storms. Considerable amounts of trash and debris wash out of the storm sewer system during rain and choke portions of the stream, leading to areas of ponding and mosquito breeding. The resulting hydrologic alterations to natural stream equilibrium have deteriorated the water quality of Nash Run and degraded natural habitat downstream of the outfall. This scope of work aims to develop a system to capture trash and sediment at the end of the storm sewer system in an effort to reduce these loads on the Anacostia River. The project will improve water quality in the stream, reduce sediment and floatable pollution, and allow base flow to smoothly run through the stream corridor while also being able to slow and filter storm events.
Project Description
The District of Columbia Department of the Environment will restore approximately 800 feet of the Nash Run watershed. The project will stabilize stream banks to prevent bank erosion and degradation of the stream, re-establish native vegetation in the riparian corridor along the stream banks, and create a stream corridor suitable for terrestrial and aquatic habitat. Grant funds will be used for stream restoration and construction activities.
