DC Water will host a virtual community meeting on Thursday, June 11, 2026, to inform residents and other stakeholders about the emergency rehabilitation of a section of the Potomac Interceptor at Muddy Branch near Pennyfield Lock (Lock 22) in Potomac Maryland. Recent inspections identified structural deterioration in this section, including significant corrosion and exposed rebar, requiring immediate repair.

As part of this emergency effort, contractors will begin mobilizing at the site on Monday, June 15, to rehabilitate about 1,700 linear feet of the interceptor. 

On a typical dry weather day, this segment conveys an average of six million gallons of wastewater and serves as a critical connection to the main trunk of the Potomac Interceptor.

Following the January 19, 2026, failure along the Clara Barton Parkway in Cabin John, Maryland, DC Water expanded its inspection program across the entire 54-mile Potomac Interceptor system. Along with standard video inspections, DC Water used LiDAR to measure wall thickness and sonar to identify debris or blockages.

Although the findings identified in this section warranted moving this work to the top of DC Water’s repair priorities, the most deteriorated portion of the pipe is fully encased in concrete, which reduces the risk of failure and the likelihood of an impact to public water supplies, public health and the environment. 

DC Water officials and technical staff will present an overview of the project, share key findings, and respond to questions from community members during the meeting. 

Meeting Information

What: Virtual Community Meeting on Emergency Repairs to Potomac Interceptor
When: 7:00 PM, Thursday, June 11, 2026
Where: Microsoft Teams Meeting

Join: https://teams.microsoft.com/meet/247771688929694?p=VdqaoZtsH2m1AxGwkb

Dial in by phone: +1 202-753-6714,,695210785#
                              Phone conference ID: 695 210 785#

Who: DC Water leadership and technical staff

More information about this project is available on the DC Water website at https://www.dcwater.com/about-dc-water/media/news/emergency-work-rehabilitate-section-potomac-interceptor-begin-potomac-md