Beginning on or about January 19, 2026, weather permitting, DC Water will implement a temporary lane closure on Rock Creek and Potomac Parkway NW between Virginia Avenue NW and F Street NW. During this time, crews will perform well-monitoring instrument activities.

This work is part of DC Water’s efforts to construct the Potomac River Tunnel—an essential component of the Clean Rivers Project designed to ensure cleaner, healthier waterways for generations to come.

Rock Creek and Potomac Parkway NW

Northbound Lane Closure

• Date: Jan. 19–23, 2026, weather permitting
• Time: 9:30 a.m.–3:30 p.m.
• Location: Northbound lane closure on Rock Creek and Potomac Parkway NW between F Street NW and Virginia Avenue NW
• Traffic Pattern Changes and Pedestrian/Bicycle Detours:
  • Traffic: Temporary lane closure from 9:30 a.m. to 3:30 p.m.
  • Pedestrian and Bicyclist Detours: Signage will direct pedestrians and cyclists around the work zone.
• Commuters and pedestrians are advised to follow signage directing them around the temporary closure.
• Please plan travel routes accordingly and anticipate short delays. Traffic control measures will be in place to guide motorists safely through the area.
• See the map below for additional details.

Project Details

The Potomac River Tunnel is part of DC Water’s Clean Rivers Project, a long-term effort to reduce pollution in our waterways. Each year, about 650 million gallons of untreated sewer overflows enter the Potomac River and, ultimately, Chesapeake Bay, releasing trash and increasing bacteria levels harmful to aquatic life. The 5.5-mile tunnel system will help capture and redirect this overflow to the Blue Plains Advanced Wastewater Treatment Plant, reducing the volume of overflow by 93% and the number of times this occurs from 74 to 4 in a typical year.

This work is being completed in compliance with a 2005 Federal Consent Decree entered by DC Water, the District of Columbia, the US Environmental Protection Agency, and the US Department of Justice, as amended in January 2016.

Learn more at www.dcwater.com/prt. Contact Us Project Email: dcpotomacrivertunnel@dcwater.com Project Hotline: 202-972-1388 DC Water 24-hour Emergency: 202-612-3400