![]() The goal of the effort was to daylight a 1,600 foot portion of Broad Branch, a tributary to Rock Creek in Northwest DC. This project began in February 2014 and was completed in October of 2014. Other projects include rehabilitating sanitary sewers, constructing stormwater management facilities, and reducing the amount of stormwater runoff from impervious areas. Stream restoration is one part of a multi-agency, collaborative effort to improve water quality of the Watts Branch watershed and the Anacostia River. In the years to come DDOE will be actively monitoring the stream to look for an increase in macro-invertebrates, improvements in water quality, and changes in geomorphology. Through the aforementioned water quality improvements coupled with in-stream structures and an improved riparian corridor DDOE anticipates an improvement in aquatic species over the ensuing years. Estimates show that this stream project will help reduce total suspended solids (TSS) in Watts Branch by 51,000lbs/yr, nitrogen (N) by 400lbs/yr, and phosphorous (P) by 70lbs/yr. The project will reduce stream bank erosion, improve water quality, and restore aquatic habitat. The final component of the project was to plant thousands of trees and shrubs along the stream corridor to increase the riparian area along the stream. ![]() In addition to the in-stream work the project also entailed the creation of bankfull benches for energy dissipation during high flow events further reducing bank erosion. NCD also creates a series of pools and riffles that both create areas for fish habitat and offer grade control on the stream. Through the natural channel design method a series of in-stream structures were installed (cross vanes, j-hooks, and vane arms) to keep the high velocity flows in the center of the stream channel thus minimizing erosive forces on the stream banks. The stream restoration project used Natural Channel Stream Design (NCD) practices over a 1.7 mile stretch of stream on District property. Fish and Wildlife Service and the Natural Resources Conservation Service of USDA completed a restoration project for the Watts Branch tributary of the Anacostia River in Washington, DC from Southern Avenue to Minnesota Ave. The District Department of the Environment, the U.S. Two large LID retrofits on M Place in Southeast DC treat stormwater runoff from the street prior to it entering nearby Pope Branch. The RSC installations will reduce erosion and decrease pollutants reaching Pope Branch and the Anacostia River by slowing down and infiltrating stormwater runoff from streets along Pope Branch.This project was implemented using American Recovery and Reinvestment Act (ARRA) funding and was a partnership between DDOE and the District Department of Parks and Recreation (DPR). A regenerative stormwater conveyance (RSC), also known as a coastal plain outfall, is a specialized type of low impact development technique that uses stream restoration techniques to create a dependable open channel conveyance with pools and riffle-weir grade controls to create a system of physical features, chemical processes, and biological mechanisms that greatly reduce erosive forces and positively impact the ecology of a drainage area. Pope Branch Regenerative Stormwater Conveyances:Īt three different locations DDOE installed regenerative stormwater conveyances to help catch and filter stormwater run-off from the streets that drain into the Pope Branch tributary of the Anacostia River. ![]() ![]() It is hoped that DDOT and DC Water will adopt these techniques in future roadway and storm sewer upgrades that are adjacent to or drain onto NPS land or open space. These projects are a unique partnership between the District and the National Park Service (NPS) to control stormwater from District lands while restoring intermittent streams on NPS land. The RSC installations will reduce erosion and decrease pollutants reaching Rock Creek by slowing down and infiltrating stormwater runoff from Oregon Avenue. The purpose of these two restoration projects is to demonstrate the effectiveness of regenerative stormwater conveyances by installing a series of them along Oregon Avenue in Northwest D.C. Bingham Run and Milkhouse Ford Regenerative Stormwater Conveyance Projects: ![]()
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