On Saturday, March 8, DC Water will close the outbound lane of Clara Barton Parkway at Chain Bridge to inspect a section of the Potomac Interceptor, a major sewer line which crosses the Potomac River.

The lane closure will begin at 8 a.m. and continue until 3 p.m. During the inspection, DC Water and its contractor will be working in the outbound lane past Chain Bridge to access the sewer line through a manhole in the roadway.

Motorists are advised to follow directional signage and the instruction of flaggers. Traffic will alternate in both directions utilizing one lane. Drivers may also use MacArthur Blvd as an alternative to Clara Barton Parkway.

As part of the inspection, DC Water will use a camera on closed circuit TV to go into the sewer line. It’s part of routine preventative maintenance to identify any defects or issues that could compromise the pipe and make repairs if necessary to maintain reliable sewer service.

The Potomac Interceptor is a 54-mile long sewer line that runs from areas near Dulles International Airport to Maryland and DC Water’s Blue Plains Advanced Wastewater Treatment Plant. The line crosses the Potomac in three location, one of them at Chain Bridge. It’s a key infrastructure asset, transporting 60 million gallons of wastewater daily.