District of Columbia, DC Environmental Rules: Coastal Development (2026)

DC's waterfront regulation involves the most complex multi-agency framework of any coastal-equivalent topic in this jurisdiction. Development along the tidal Potomac, Tidal Basin, Washington Channel, and Anacostia River is subject to: (1) Federal US Army Corps of Engineers (USACE) Section 404 permits for any fill of Waters of the United States, Section 10 permits for any structure in navigable waters, and Section 408 review for projects near federal flood control structures; (2) DC DOEE Wetland Protection and Water Quality Certification under the Clean Water Act Section 401; (3) DC Department of Transportation public space permits for riparian encroachment; (4) National Park Service jurisdiction over most Potomac shoreline in DC (East Potomac Park, Hains Point, Georgetown Waterfront Park); (5) National Capital Planning Commission (NCPC) review for federal interest projects; (6) US Coast Guard for bridge/channel work. DC Code section 8-1322 (Wetland Protection Act of 2001) prohibits filling or draining wetlands without a DOEE permit. Riparian buffers of 25 feet minimum (often 50-100 feet for Resource Protection Areas) apply along the Anacostia, Rock Creek, and their tributaries under the Anacostia Waterfront Initiative and the Tributary Strategies. Floodplain development in FEMA Zone A and Zone AE (mapped along the Anacostia riverbank from RFK Stadium south and along the Washington Channel) requires elevation of lowest floor to Base Flood Elevation plus 1.5-foot DC freeboard under DCMR 12-G. The Anacostia is still recovering from decades of industrial pollution and has federal Chesapeake Bay TMDL requirements.