DC Water is advancing to the next critical phase of the Rock Creek Main Interceptor (RCMI) repair project, following the discovery in May of structural vulnerabilities in the 72-inch diameter sewer line that carries over 100 million gallons of wastewater daily. These repairs are a high priority to prevent potential sewage discharge into Rock Creek and are part of DC Water’s Capital Improvement Program.

To safely begin Phase 1 construction, a section of the Rock Creek Multi-Use Trail will be closed for two days:

• Closure Start: Friday, October 3, 2025 at 8 PM
• Closure End: Sunday, October 5, 2025 at 8 PM
• Trail Segment: Between P Street NW and Pennsylvania Avenue NW
• Detour: Available via Rose Park
• Work Hours: Continuous, 24/7 throughout the weekend

During the gate restoration, one lane of southbound Rock Creek and Potomac Parkway NW will also be closed.

This initial phase focuses on restoring one of two gates located within a structure along the trail—an essential step before internal pipe inspections and full-scale repairs begin in Phase 2 later this fall.

The gates being restored are critical to managing wastewater flow during construction and wet weather events. Located at key points along the RCMI system—including near the Smithsonian National Zoo, Rock Creek Trail near Rose Park, and the Georgetown Waterfront—these gates allow DC Water to divert flow away from active work zones. During heavy rain, the gates can be opened to increase system capacity and reduce the risk of overflow, helping protect both the infrastructure and the surrounding environment.

Looking ahead, Phase 2 of the rehabilitation project will involve internal restoration of approximately 3,000 feet of the 72-inch diameter pipe and is expected to run through September 2026.

DC Water appreciates the public’s patience and cooperation as crews work to safeguard the integrity of this vital infrastructure. Noise and traffic impacts will be monitored throughout the project, and updates will be shared regularly.