DC Water says a temporary bypass system is now containing sewage from a collapsed segment of the Potomac Interceptor sewer line, significantly reducing the overflow that began last week near the C&O Canal.
The agency activated high-capacity pumps Jan. 24 to divert wastewater around the collapse and return it to the sewer downstream. Officials said the system has sharply cut uncontrolled discharges while it limits environmental impacts to the Canal corridor and nearby Potomac River.
Since the initial collapse, crews have worked through cold temperatures and snow to stabilize the site and manage wastewater flow. The spill started when a 72-inch sewer pipe failed, sending raw sewage into areas of the national park.
DC Water reports wastewater being routed back into the sewer has increased by tens of millions of gallons per day since the bypass went online, indicating containment has improved. Crews will now focus on draining the remaining wastewater to allow excavation and permanent repairs. The agency has not released a repair timeline.
DC water said the incident still does not affect drinking water systems because they are separate from sewer infrastructure and the spill is located downstream of intake points.
Residents are advised to avoid contact with contaminated water. Questions and reports can be directed to DC Water’s Customer Care line at: 202-354-3600.
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