Multiple people are being assessed after a fire broke out Thursday on a trolley in an underground tunnel connecting the ...

Billionaire entrepreneur Elon Musk's mysterious tweets about tunnels have sparked a flurry of speculation about his next project -- and he apparently did some research last week in D.C. The founder of ...

Washington, D.C., officials said they are investigating a small electrical fire believed to be extinguished on the trolley ...

A minor fire sparked a brief scare in the subway tunnel connecting the Rayburn House Office Building and the US Capitol on ...

The District of Columbia Water and Sewer Authority has proposed modifying its current $2.6 billion D.C. Clean Rivers Project to incorporate green infrastructure into the later stages of its expansive ...

WASHINGTON — A new three-lane road opened November 18 in West Potomac Park to ease traffic for commuters and drivers affected by DC Water's six year Potomac River Tunnel construction project. Named ...

The founder and administrator of an obscure website about underground infrastructure in Washington, D.C., saw a sudden and suspicious spike in traffic in the days before the U.S. Capitol insurrection.

WASHINGTON — The National Park Service and D.C. Water are moving forward with a project to improve water quality in the District. The proposed Piney Branch Tunnel Project aims to capture and ...

Web traffic to WashingtonTunnels.com was so unusually high starting on Jan. 1 that the site’s operator notified the FBI NBC Universal, Inc. The founder and administrator of an obscure website about ...