Northwest Branch Anacostia River

Northwest Branch Anacostia River is a 21.5mi free-flowing stream in Montgomery County and Prince George's County, Maryland. It is a tributary of the Anacostia River, which flows to the Potomac River and the Chesapeake Bay.CourseThe headwaters of the Northwest Branch are located near the community of Sandy Spring. The stream flows southward for to its confluence with the Northeast Branch near Bladensburg to form the main stem of the Anacostia.WatershedThe watershed in Montgomery County includes portions of the communities of Norwood, Bel Pre Manor, Colesville, Layhill, Glenmont, Wheaton, Hillandale, White Oak, Silver Spring, Kemp Mill, Four Corners and Takoma Park. The Prince George's County portion of the watershed includes Adelphi, Langley Park, University Park, Chillum, Hyattsville, Avondale and Brentwood. The total watershed area, including a small portion of land in Washington, D.C., is, with a resident population of about 254,000.