Potomac by Air: Our Nation's River. Special | 57m 52s Video has Closed Captions | CC. Explore the nation’s history through an aerial trip along the Potomac River. 02/14/2016 | Expires 02/14/2026 ...

A crucial race against the clock to dig a tunnel under the Potomac River depends on a powerhouse player: a 15-foot-wide, 380-ton machine named “Hazel.” This round metal device, a custom-made ...

The existing 117-year-old, double-track span over the Potomac — the main route for trains traveling south from Washington — is at 98 percent capacity during peak traffic times.

U.S. Sen. Mark Warner, of Virginia, on Friday handed over $20 million in federal money to build the Long Bridge Bicycle and Pedestrian Crossing Project across the Potomac River, which would ...

Maryland officials are concerned about an area along the west side of the Potomac River and south of U.S. Route 301—at the mouth of the Upper Machodoc Creek in Virginia.