Reinforcement of the upstream section of the Potomac Interceptor has been completed, marking the halfway point in emergency repairs following the January 19 sewer line collapse. Crews continue to advance repairs on schedule, with full project completion expected by mid-March.

DC Water today is releasing a comprehensive assessment detailing the condition of the Potomac Interceptor and our emergency response to the January 19 sanitary sewer line failure. This report provides clarity for customers, stakeholders, and community members about the steps taken and findings from the incident, including prior inspections of the pipe’s condition.

After the collapse, DC Water’s leadership and engineering teams reviewed inspection reports, structural ratings, engineering assessments, and video documentation for the affected section. Over seven years, four internal inspections ...

DC Water and its contractor have taken significant steps toward repairing the Potomac Interceptor. The repair process currently underway involves reinforcing the damaged section of the pipe using geopolymer. This material is known for its concrete-like strength and durability.