Heavy Construction for First Street Tunnel Project is Underway- Commuters/Through Traffic Travelers are Advised to Seek Alternative Routes

September 09, 2014

(Washington, DC) – DC Water is performing construction activities in four surface locations in the Bloomingdale neighborhood as part of its First Street Tunnel Project.

This important local flood control and environmental project will be under construction until March 2016, and traffic impacts will be 24 hours, 7 days per week for the duration of the project.

Surface Locations and Related Traffic Impacts
Adams Street NW, from First Street NW through the intersection with Flagler Place NW
• Construction is in progress. This portion of Adams Street will be closed to through traffic beginning the week of Monday, August 25, 2014 until February 2016. Adams Street will be open to local traffic only from First Street and 2nd Street.

V Street NW, through the intersection with First Street NW
• Construction is in progress. Beginning on or about Wednesday, September 10, 2014 until November 2014, First Street will be closed to through traffic at the intersection with V Street to allow for the construction of a diversion chamber in the center of the roadway. This portion of First Street will be open to local traffic only from U Street and W Street. An extended closure at this location may be required, and public notification will be provided.

Thomas Street NW at First Street NW
• Construction is in progress. Beginning the week of Monday, August 25, 2014 until September 2015, the 100 Block of Thomas Street and adjacent privately owned parking lot will be closed to through traffic to allow for the construction of a temporary pump station and associated structures. Thomas Street will be open to local traffic only from 2nd Street.

First Street NW, between Channing Street NW and Michigan Avenue NW
• Construction at the main mining shaft site is underway. Work will continue at the McMillan Sand Filtration Site until March 2016. First Street will remain closed to northbound/southbound traffic through November 2014. It is advised that North Capitol Street be used as an alternative route for travel on First Street.

Other Important Information
* Temporary traffic signs will be set up throughout the area to alert motorists to the traffic changes.
* Some traffic delays within the vicinity of the work zones should be anticipated.
* Sidewalk detours have been implemented to assist pedestrians.
* Noise, vibration and dust levels are all closely monitored and will continue for the duration of the project.

Project Details
The First Street Tunnel Project extends along First Street NW, beginning at the McMillan Sand Filtration Site below ground, and heading southbound to Rhode Island Avenue NW. The First Street Tunnel was accelerated as part of the Mayor’s Task Force on the Prevention of Flooding in Bloomingdale and LeDroit Park to relieve street and basement flooding in these neighborhoods. DC Water has hired the Design-Build firm of Skanska-Jay-Dee to construct the tunnel and associated structures.
###

About DC Water
The District of Columbia Water and Sewer Authority (DC Water), is an industry leading multi-jurisdictional regional utility that provides drinking water, wastewater collection and treatment to 600,000 residential, commercial and governmental customers in the District of Columbia, 17.8 million annual visitors and also collects and treats wastewater for 1.6 million customers in Montgomery and Prince Georges counties in Maryland and Fairfax and Loudoun counties in Virginia.

DC Water’s service area covers approximately 725 square miles and the company operates the world’s largest advanced wastewater treatment plant with a capacity of 370 million gallons per day and a peak capacity of 1.076 billion gallons per day.

Please visit dcwater.com/firststreettunnel for more information on the First Street Tunnel Project.

Latest News

Map of lane closure on Clara Barton Parkway at Maryland-DC Border

Drivers should expect delays on Clara Barton Parkway at the Maryland – DC border on Saturday, Sept 26. One lane will be closed from 7 a.m. to 3 p.m. while DC Water makes repairs as part of ongoing ...

Christening of TBM Emily with DC Water Interim General Manager Matt Brown holding bottle of tap water to christen Emily

DC Water celebrated the christening of Emily today. It’s the second giant tunnel boring machine (TBM) that will help build the 5.5-mile Potomac River Tunnel. The celebration continued with Community Day. Residents and families met Emily and stepped inside the tunnel where she will soon begin digging.

Map: Temporary closure of the southbound curb lane on Rock Creek and Potomac Parkway NW

DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT

Drivers should expect a temporary southbound lane closure on Rock Creek and Potomac Parkway NW between F St and Virginia Ave on Saturday, September 19, and Sunday, September 20, 2026. The closure will be in place from 7 a.m. to 7 p.m. each day, weather permitting.

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

Christening of TBM Emily with DC Water Interim General Manager Matt Brown holding bottle of tap water to christen Emily
DC Water Welcomes the Community Underground to See the Potomac River Tunnel and Christens Tunnel Boring Machine Emily

DC Water celebrated the christening of Emily today. It’s the second giant tunnel boring machine (TBM) that will help build the 5.5-mile Potomac River Tunnel. The celebration continued with Community Day. Residents and families met Emily and stepped inside the tunnel where she will soon begin digging.

Latest Blog Post
Emergency supplies arranged on a table, including bottled water, canned food, a backpack, first aid kit, flashlight, phone, medication and other essential items.
Simple Ways to Stay Prepared at Home
A few simple steps can help your household prepare for severe weather and temporary water or sewer service interruptions.
Upcoming Meeting
Date
October 8, 2026
Thursday, 9:30 AM

Upcoming Events

Customer Service Center Announcement

Payment Plan Incentive: provides a credit back of 50% of the last 3 payments made. Eligible participants are residential customers who have had an outstanding balance for 60 days or greater and with an outstanding balance of $500 or more.