DC Water isolates leak in 3rd Street Tunnel, transitions to repair

August 24, 2021
3rd Street Tunnel

Water service restored to all customers on Monday;
DC Water partnering with District agencies on unified response

DC Water continues to address the water main break in the 3rd Street Tunnel. The break is on an 8-inch main that runs through the tunnel, though the exact location of the break is still being determined.

DC Water will provide an update on the time to repair once the location and repair needs are determined. The system pressure remains stable, and we do not anticipate any additional outages related to this incident. The tunnel closure is confined to the area of the break. Commuters can travel northbound as far as Massachusetts Ave, NW and southbound from Massachusetts Ave, NW.

DC Water CEO and General Manager David L. Gadis, commented, “The good news is that we were able to restore water service to all customers yesterday. All but one building were back in service by late afternoon and the remaining building, 307 K Street, NW, had water service in the evening. Still, DC Water mobilized bottled water distribution to 307 K Street NW and delivered nearly 650 cases of water to the building.”

Gadis added, “I would like to thank all the staff and agencies involved in this event. The District agencies and the Executive Office of the Mayor quickly coordinated and have provided a joint response. This is arduous work, around the clock, in extreme heat—all the responders have my gratitude.”

As there are many causes of water main breaks and leaks, DC Water will have a better understanding of the cause of the infrastructure failure in this case once the water main is exposed. A specific cause is not always determined.

Elsewhere in the District yesterday were reports of low water pressure in Northwest; however, those were related to hydrant flushing— the practice of opening fire hydrants to pull fresh water through the system— and were unrelated to this incident. That work was completed yesterday afternoon and DC Water confirmed that water pressure was restored to those customers.

 

Latest News

Map: The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.

The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.

CONSTRUCTION ACTIVITY NOTIFICATION - DC CLEAN RIVERS - POTOMAC ...

Phase 1 repair photo of tunnel and worker inside after completion

Following a nearly year-long construction effort, DC Water has completed repairs on a nine foot diameter, 140-year old sewer tunnel on 22nd Street Northwest. Construction was done in two phases, with ...

Graphic of Boil Water Advisory Lifted Notice with neighborhoods listed


**Advisory is Lifted as of 9:00 p.m., June 13, 2025** 

All DC Water customers in the impact area under the precautionary boil water advisory can use tap water for all purposes after following the ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Map: The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.
New Section of Capital Crescent Trail Opens, Potomac River Tunnel Construction moves to next phase

The new trail route south of the work zone is a shared path for pedestrians, bicyclists, and motorists visiting the Washington Canoe Club.

Latest Blog Post
A helicopter lowers a drill rig to workers on the Potomac River.
DC Water begins drilling in Potomac River to explore options to rehab underwater sewer line
When one of your major sewer lines runs through the Potomac River, a backhoe and trencher won't do. That's why we've got helicopters carrying a 14-ton drill and workers suspended midair over the Potomac.
Upcoming Meeting
Date
June 18, 2025
Wednesday, 9:30 AM