Kingman Lake is not a true lake, but a 110-acre tidal freshwater impoundment created in the 1920s and 1930s during a massive dredging and channelization project on the Anacostia River to provide a recreational boating area for District of Columbia residents. During this project, the Anacostia River was straightened and a former river bend was left as a pseudo oxbow lake, Kingman Lake. Kingman Lake is still connected to the Anacostia River by two inlets at the northern and southern end of Kingman Island, a wooded 94-acre dredge/fill-created island that separates the lake from the Anacostia River. Kingman Lake is tidally influenced.
Kingman Lake was listed on the District’s 1998 Section 303(d) list of impaired waters, with biochemical oxygen demand (BOD), total suspended solids (TSS), and oil & grease identified as pollutants of concern. However, in memos dated October 31, 2003, US Environmental Protection Agency (EPA) noted that a total maximum daily load (TMDL) for BOD and TSS were no longer needed in Kingman Lake following additional sampling and analysis. The oil and grease TMDL for Kingman Lake was approved on October 31, 2003.
The following documents include TMDLs for oil and grease in Kingman Lake in addition to justification memos and decision rationale from EPA.