
From DC Water January 28, 2026:
“UPDATE: DC Water Begins Excavation to Assess Damaged Sewer Line and Lay Groundwork for Repair Efforts
Excavation is underway to access a damaged section of the Potomac Interceptor, a major sewer line that collapsed on January 19, along Clara Barton Parkway near the 495-interchange and C & O National Historical Park in Montgomery County, MD. This marks a pivotal step forward in the recovery process, allowing DC Water and its contractor to directly inspect the damaged pipe, exposing the affected section to assess its condition and formulate the best possible repair strategy.
A bypass system activated this weekend continues to successfully divert wastewater back into the sewer line further downstream of the collapse site. Engineers on-site report the lowest level of overflow from the area around the collapse since the incident started allowing the excavation activities to begin.
While still in the early stages of excavation, (more…)