PUBLIC MEETING NOTICE: DC Water to Provide Update and Next Steps on Potomac Interceptor Response

February 21, 2026
Graphic with details about the two community meetings.

DC Water will host two community meetings to provide a comprehensive update on the Potomac Interceptor response, current system status, and next steps in emergency repair and long-term rehabilitation efforts.

The meetings will provide a structured overview of:

  • What occurred
  • Immediate response actions
  • Current repair timeline
  • Long-term Capital Improvement Plan commitments

DC Water officials and technical staff will present information directly and answer questions from community members.

Meeting Information

Wednesday, February 25 - Washington, DC

What: Community Meeting on Potomac Interceptor Response

Where: DC Water Headquarters, 1385 Canal St SE, Washington, DC 20003

Time: 7:00 PM

Who:

David L. Gadis, CEO and General Manager, DC Water

Matt Brown, Chief Operating Officer, DC Water

Kirsten Williams, Chief Administrative Officer, DC Water

Moussa Wone, Chief Engineer, DC Water

Jeff Peterson, Director, Clean Rivers Project, DC Water

 

Thursday, February 26 – Bethesda, Maryland

What: Community Meeting on Potomac Interceptor Response

Where:
Walt Whitman High School (cafeteria), 7100 Whittier Blvd., Bethesda, MD 20817

Time: 7:00 PM

Who:

David L. Gadis, CEO and General Manager, DC Water

Matt Brown, Chief Operating Officer, DC Water

Kirsten Williams, Chief Administrative Officer, DC Water

Moussa Wone, Chief Engineer, DC Water

Jeff Peterson, Director, Clean Rivers Project, DC Water

Background

On January 19, 2026, a section of the 54-mile Potomac Interceptor (PI) sewer line collapsed along Clara Barton Parkway, in Montgomery County, resulting in a significant overflow into the C & O Canal National Historical Park. The PI carries about 60 million gallons of wastewater daily from as far away as Dulles Airport to the Blue Plains Advanced Wastewater Treatment Plant in Southwest DC for treatment.

DC Water crews and contractors began work immediately to construct a bypass to contain the overflow. The bypass was completed and activated on January 24, utilizing powerful pumps and the C&O Canal to reroute wastewater around the collapsed section of pipe and back into the sewer system. o additional overflows entering the Potomac River have occurred since February 8. Crews are removing rocks and debris from the collapsed section of pipe and emergency repairs are projected to be completed by mid-March.

Protecting public health and the Potomac River remains DC Water’s top priority. For the latest information about the Potomac Interceptor Response, go to dcwater.com/potomac-interceptor-collapse.

Latest News

Photo of soil removal and excavation

DC Water and its contractor have removed all the soil down to the clay liner between locks 12 and 13, marking 50% completion of the canal clean-up. Soil removal between Locks 13 and 14 was completed earlier this month. Meanwhile, clean-up efforts continue between locks 10 and 12, with sludge removal complete and soil removal now underway.

View of Mary at bottom of shaft inside tunnel shown from above

First turn of cutterhead signals the start of excavation for the Potomac River Tunnel Project

In a defining moment for one of the District’s largest infrastructure investments, DC Water has marked its next major milestone in the Potomac River Tunnel Project. The first tunnel boring machine, Mary, has launched her northbound journey breaking through the soil to signal the start of excavation.

With the first turn of Mary’s drill-like cutterhead underground, the machine pushed forward to begin tunneling, representing the transition from years of planning and preparation to active tunnel construction on the $819 million project.

Photo of the vegetation growing back in the culvert area
  • DC Water has completed soil removal, utilizing excavators and manual digging, to expose the clay lining for the C & O Canal between locks 13 and 14. This is the final step in the clean-up process ...

Upcoming Meeting

Board of Directors Meeting

April 24, 2023

Monday 9:00 AM

Announcement

View of Mary at bottom of shaft inside tunnel shown from above
DC Water Launches Tunnel Boring Machine Mary, Marking Important Step for Potomac River Tunnel Project

First turn of cutterhead signals the start of excavation for the Potomac River Tunnel Project

In a defining moment for one of the District’s largest infrastructure investments, DC Water has marked its next major milestone in the Potomac River Tunnel Project. The first tunnel boring machine, Mary, has launched her northbound journey breaking through the soil to signal the start of excavation.

With the first turn of Mary’s drill-like cutterhead underground, the machine pushed forward to begin tunneling, representing the transition from years of planning and preparation to active tunnel construction on the $819 million project.

Latest Blog Post
A helicopter lowers a drill rig to workers on the Potomac River.
DC Water begins drilling in Potomac River to explore options to rehab underwater sewer line
When one of your major sewer lines runs through the Potomac River, a backhoe and trencher won't do. That's why we've got helicopters carrying a 14-ton drill and workers suspended midair over the Potomac.
Upcoming Meeting
Date
April 15, 2026
Wednesday, 9:30 AM

Customer Service Center Announcement

Payment Plan Incentive: provides a credit back of 50% of the last 3 payments made. Eligible participants are residential customers who have had an outstanding balance for 60 days or greater and with an outstanding balance of $500 or more.