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 designed to ensure cleaner, healthier waterways for generations to come.

Rock Creek and Potomac Parkway NW

Northbound Lane Closure

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 reliability.Starting Friday, January 16, 2026, at 8 PM through Monday, January 19, 2026, at 5 AM the Rock Creek Multi-use Trail will be closed between P Street NW and Pennsylvania Avenue NW, and a marked ...