Urban sections of the Potomac River are on the brink of becoming safe for swimming, but deforestation and polluted urban runoff are holding back efforts to clean up the waterway, according to a ...

just before 9 p.m. E.T. Investigators say there are likely no survivors in the deadly collision above the icy waters of the Potomac River near the nation's capital. Reagan National is considered ...

The United States Geological Survey (USGS) and Dewberry, a privately held professional services firm, have jointly released a new topobathymetric lidar dataset for the Potomac River, extending from ...

the marina offers a protected cove for a future beach. None of these locations would always be safe for swimming. With its antiquated sewer system, heavy rains flush sewage into the Potomac River.

Ten days after a passenger jet and a Black Hawk helicopter collided over the Potomac River near ... a green laser to scan the river floor and help investigators map out its layout.