Potomac River Guide Home

Interactive Maps

The Lower Potomac

The Potomac Estuary

Mount Vernon to Reagan Airport

Mall Area

Georgetown to Great Falls

Potomac Piedmont

Upper Potomac

The North Branch

Boat Ramps

Monitoring Sites

Bridges and Ferries

Cruises and Charters

Search Potomac Sites

Metro Tunnel at Rosslyn, VA

Potomac River Subway Tunnel

The Metro tunnel under the Potomac services the subway's Blue and Orange lines. Built in the 1970s, it connects the Foggy Bottom station in Washington, D.C. to the Rossylyn station in Virginia. The tunnel was bored through rock. Expansion of the subway system may mean an additional crossing of the Potomac.

Nearby Potomac River Crossings
Upstream
Downstream
To view all Potomac River crossings, select this link.

Click here for larger map and nearby sites.

Contact Information
Washington Metropolitan Area Transit Authority

DC

Website