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.

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.

Beginning this week and continuing through the end of September, DC Water may close one lane temporarily between 10 a.m. to 2 p.m. on Clara Barton Parkway at the Maryland - DC border. The closures are necessary to allow crews to safely deliver materials to the job site and service equipment.

To reduce traffic delays, lane closures will be used as needed throughout the month of September to support ongoing work. Crews may need to use the full 10 a.m. to 2 p.m. timeframe when necessary to complete the work. One lane will be closed during these periods, while the remaining lane will remain open to ...