DC CLEAN RIVERS – POTOMAC RIVER TUNNEL PROJECT
If you bike, drive, or walk through Georgetown, we’ve got changes starting this week around the Potomac River Tunnel construction on Water Street NW. The Capital Crescent Trail has a new temporary detour through Georgetown Waterfront Park, open now for cyclists between 33rd and Potomac streets NW.
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 ...
Construction crews will be working around the clock on the Rock Creek Main Interceptor (RCMI) project this weekend, requiring a section of the Rock Creek Multi-use Trail to be closed and changes in traffic patterns. Rehabilitation of the 72-inch diameter main is a high priority project as part of DC Water’s Capital Improvement Program and is critical to protecting Rock Creek and improving ...
Something big is happening underground, as DC Water marks a major step forward for the Potomac River Tunnel Project. Today, crews successfully lowered the massive cutterhead for the tunnel boring machine (TBM) Mary. The 21-foot diameter cutterhead acts as a giant drill, to cut through rock and soil as Mary excavates the northern section of tunnel.
Beginning the week of January 12, 2026, DC Water will begin the next phase of construction for the Potomac River Tunnel Project at the Georgetown University entrance site along the Canal Road NW.
Learn more about winter replacements and protecting pipes from the cold
When temperatures plunge and the ground freezes, replacing lead service lines becomes more challenging—but DC Water doesn’t stop. Our Lead Free DC (LFDC) crews adapt. To learn more DC Water is hosting a virtual community meeting 6 - 7 p.m., Jan 28.
Major Milestone Paves Way for Potomac River Tunnel Construction at the Site
DC Water has completed its slope stabilization project along Canal Road, a critical step in order to move forward with construction for the Potomac River Tunnel Project. Originally scheduled to end in February, the project finished about two months ahead of schedule, minimizing additional impacts to commuters and ...
With December getting off to a near-record cold start now is the time to act. Winter weather can bring risks like frozen pipes, water main breaks, and other emergencies that can disrupt your water service. Don’t wait for something to happen. DC Water encourages customers to prepare now and know what to do if the unexpected happens.
TRAFFIC ADVISORY - CLEAN RIVERS - POTOMAC RIVER TUNNEL PROJECT
DC Water is in the final stretch of its slope stabilization project along Canal Road NW, a critical project that will pave the way for Potomac River Tunnel construction at this site. Beginning, the week of December 15, 2025, one westbound lane of Canal Road will be closed during daytime, off-peak hours on weekdays and Saturdays to ...
DC Water is reaching out to nearly 25,000 customers this month with important information about the material of their water service lines. These annual notifications are part of DC Water’s ongoing commitment to prevent exposure to lead and remove lead service lines from the District’s drinking water system through the Lead Free DC initiative.
