Monday, April 12, 2021

DC Water NEBT update: 1st Street NW traffic pattern change

Sent: Monday, April 12, 2021 3:53 PM
Subject: First Street NW Traffic Pattern Change 

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Northeast Boundary Tunnel Project
First Street NW Traffic Pattern Change

April 12, 2021

Greetings Neighbors.

Please be aware of the traffic pattern change on First Street NW. 
* Between Thomas Street NW and Rhode Island Avenue NW, traffic on First Street is southbound only. 


View from Rhode Island Avenue NW. Do Not Enter First Street NW from Rhode Island Avenue NW. Use the detour.

View from Thomas Street NW. Southbound traffic on First Street, NW has been shifted to the northbound lane.


Last week, DC Water’s contractor began removing jet grout lines from First Street NW. Work is estimated to be completed by the end of this week. During this work southbound traffic on First Street, NW will be temporarily shifted to the northbound side and remain a single lane until jet grout lines are removed and the road repaired. Reopening of First Street NW north and southbound is estimated in 2 weeks. All dates and work schedules are subject to change due to weather.
At the intersection of  Rhode Island Avenue NW and First Street NW barrels are in place and signs warn that the road is closed. Use the detour. Travel and parking restrictions will remain in place on Rhode Island Avenue NW towards the T Street NW Construction Site.


Map 1: Aerial view of the First Street & T Street NW Construction Sites, the yellow areas represent the construction sites. White arrows show traffic flow around the site. Blue lines reflect parking restrictions.


Travel and Parking Restrictions

  •  Southbound traffic on First Street, NW has been shifted to the northbound lane.
  • Travel lanes in each direction of Rhode Island Avenue NW between First Street, NW and Florida Avenue, NW will continue to be reduced to two lanes.
  • Parking restrictions will be in place on each side of Rhode Island Avenue, NW between First Street, NW and Second Street, NW.


Map 2: Aerial view of the First Street & T Street NW Construction Sites with the pedestrian detour highlighted in green. The yellow areas represent the construction work zone.


Temporary Pedestrian Detour

  • The detour will direct pedestrians to the crosswalks at the west side intersection of First Street NW and Rhode Island Avenue NW.
  • The First Street crosswalk at Rhode Island Avenue NW will be closed.
  • Use the crosswalk at Thomas Street NW for First Street.


Additional Information

  • People who live or work near the affected locations will notice additional construction equipment and personnel as well as noise associated with construction activities.
  • Commuters and pedestrians will notice road signs and/or flagging personnel directing them safely around the work site.
  • Pedestrians will notice signage for the closed sidewalk restricting access.


Project Details
The Northeast Boundary Tunnel (NEBT) is the largest component of the Clean Rivers Project. It begins south of RFK Stadium and will extend north to Rhode Island Avenue NE and west to 6th Street NW. Once the NEBT is connected to the other Clean Rivers tunnels, combined sewer overflows to the Anacostia River will be reduced by 98 percent. In addition to controlling combined sewer overflows, the construction of the Northeast Boundary Tunnel will reduce the chance of flooding in the areas it serves from approximately 50 to 7 percent in any given year.

View photos of the construction in progress:


For More Information
24/7 NEBT Hotline: (800) 988-6151
DC Clean Rivers Project:
Northeast Boundary Tunnel Project:




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Your contact information is on the First Street Tunnel Stakeholder Database.

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DC Clean Rivers Project

5000 Overlook Avenue SW

Washington, Dc 20032

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