Linnean Gully

Linnean Gully

Washington D.C.

BioHabitats Project

This design/build was one of three projects constructed in Washington D.C. through the partnership of  District Department of the Environment (DDOE) and partially funded by the National Fish and Wildlife Foundation (NFWF). It is located at the terminus of Linnean Avenue in Soapstone Valley Park. Runoff from 18.46 acres traveled though a sewer pipe and was discharged into Soapstone Valley as hot, polluted stormwater. This discharge resulted in major erosion at the end of the pipe which exposed water and sewer lines putting the cities infrastructure at risk,  while also contaminating the Soapstone Valley creek. A Regenerative Stream Conveyance was constructed using a series of cascades, weirs, and pools to stabilize the 40 foot slope. This is one of the steepest projects Underwood & Associates has constructed. This project restored 143 feet of stream, stabilized the slope, protected critical stormwater infrastructure, enhanced biological habitat, and improved water quality.