The National Transportation Safety Board recommended that a helicopter route along the Potomac River used by military and government aircraft be partially shut down after the Jan. 29 midair ...

(AP) - A riverkeeper who routinely patrols for the environmental group Potomac Riverkeeper Network ... into a pair of shallow coves along the Maryland shore. Naujoks recovered a piece of the ...

This $615 million project is key to cleaning up the Potomac River. When heavy rain strikes a centuries-old neighborhood in Alexandria, Va., the city’s pipes can’t handle the volume.

U.S. Coast Guard Petty Officer 3rd Class Corbin Singleton, left, and Petty Officer 2nd Class Lance Ide, boatswain’s mates at Station St. Inigoes, respond to the aircraft collision on the Potomac River ...

A large urban park extending from the Washington, D.C.-Maryland border to the Potomac River, Rock Creek Park is a destination for an expansive array of outdoor activities. It has more than 32 ...