DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT

Beginning on or about November 12, 2025, DC Water will begin preparing for construction on the Potomac River Tunnel on the 3300 block of Water Street NW, beneath the Whitehurst Freeway.

Construction Nov 7-10, 14-17; Additional Weekend Closures Will Also Be Necessary 

For the next two weekends, beginning Friday evening and continuing through early Monday, November 7-10 and 14-17, a section of the Rock Creek Multi-use Trail near Rose Park—between P Street NW and Pennsylvania Avenue NW— will be temporarily closed for construction. One sounthbound lane of Rock Creek and Potomac Parkway will also be closed, impacting traffic. This closure is part of ongoing high-priorty repairs to the Rock Creek Main Interceptor (RCMI), a major sewer line which transports more than 100 million ...

Today, DC Water celebrated a major milestone in the Potomac River Tunnel Project with the ceremonial blessing of Mary, the tunnel boring machine (TBM) that will dig the northern leg of the tunnel. The event, at West Potomac Park, marked the official start of tunneling for one of the final and most ambitious phases of DC Water’s Clean Rivers Program.

Mayor Muriel Bowser led the ceremonial blessing with a bottle of DC tap water, symbolizing the District’s commitment to cleaner waterways and marking the beginning of Mary’s historic journey beneath the Potomac River. She was joined by DC Water CEO ...