Catastrophic sewage spill followed years of delay on repairs, Post review finds
April 2, 2026
The D.C.-area utility responsible for a massive sewer line that failed catastrophically in January had planned to reinforce the aging section years ago but repeatedly delayedconstruction as federal officials studied potential environmental impacts, including risks to a blue wildflower and an endangered bat species, a Washington Post investigation found.
D.C. Water asked the National Park Service for permission to fast-track repairs in 2018, after inspectors found widespread corrosion and detached rebar in one area of the six-foot-wide concrete pipe that runs under federal parkland in Maryland, records show. The utility sought to strengthen a three-quarter-mile section that included the point that later ruptured.
Left unaddressed, it warned, the corrosion could “result in a catastrophic failure leading to the release of raw sewage into soil, groundwater, and waterways,” records show.