News, Public Notice

Share your thoughts on proposal to repair sewer system near C&O Canal


The National Park Service (NPS), in partnership with DC Water, welcomes public review of a proposal to repair three segments of a sanitary sewer system adjacent to the Clara Barton Parkway between Lock 14 and the Chain Bridge in the Chesapeake and Ohio Canal National Historical Park. Comments can be submitted from June 17 through July 1.

The sanitary sewer system, known as the Potomac Interceptor, was constructed in the 1960s and carries roughly 60 million gallons of wastewater per day from Washington Dulles International Airport and local communities to the Potomac Pumping Station in Washington, D.C. A pipeline

inspection has found deterioration of the reinforced concrete within three segments of pipeline. Over time, if not repaired, extensive deterioration could result in the release of raw sewage to the environment.

The repair of these pipeline segments would occur one at a time. Construction activities on the first segment would last for approximately 18 months, work on the second segment would last for approximately 14 months, and repairs to the final segment would last approximately 9 months. DC Water will work closely with NPS to identify appropriate methods to mitigate potential environmental impacts that may result from the proposed project.

Public participation is vital to the planning process. To provide comments online or find additional information on the project, go to the NPS planning website at: https://

If preferred, mail comments, make sure they are postmarked by July 1 to receive consideration. Mail comments to the following address: National Park Service; Attn: Potomac Interceptor Rehabilitation Scoping Comments, C&O Canal National Historical Park, 142 West Potomac Street, Williamsport, MD 21795.