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.

Watts Branch is the largest tributary to the tidal Anacostia River. Watts Branch watershed is 3.75 square miles with 47 percent of the area in the District, and 53 percent in Princes George’s County, Maryland.

Rock Creek flows through Montgomery County, Maryland, and the northwest portion of Washington, DC, to join with the Potomac River.

The Washington Ship Channel is a man-made waterbody located east of the Potomac River and was built in the late 19th century by the Army Corps of Engineers. The Washington Ship Channel runs from Hains Point at the confluence of the Anacostia and Potomac Rivers to the Tidal Basin.