DC Water's upcoming closure of a section of Piney Branch Parkway for the construction of Piney Branch Tunnel is set to cause major traffic headaches. The closure is set to begin on or about May 12, 2026, and is anticipated to last for 27 days, weather permitting. Detour signs will be in place to notify and direct motorists to alternate routes.
: “DC Water’s upcoming closure of Piney Branch Parkway is going to cause major headaches for folks unaware of the closure” “DC Water has nearly completed construction site preparation for the Piney Branch Tunnel project, including tree removal, and installation of fences, erosion and sediment controls, utilities, and trailers.
To complete site setup a section of Piney Branch Parkway will be relocated before starting the shaft and tunnel work. On or about May 12, 2026, Piney Branch Parkway will be closed between Arkansas Avenue NW and Beach Drive. The closure is anticipated to last twenty-seven days, weather permitting. Detour signs will be in place to notify and direct motorists to alternate routes.
The roadway will be returned to the original alignment at the end of the project. Piney Branch Parkway will be closed from Arkansas Avenue NW to Beach Drive NW for up to 27 days, weather permitting. 17th Street NW between Newton Street and Piney Branch Parkway NW will be open to local traffic and residents. The pedestrian path along Piney Branch Parkway will be maintained for the duration of the project. Expect occasional short-duration closures.
Piney Branch Parkway DetoursFrom Beach Drive to Arkansas Avenue NW motorists will be detoured to 16th Street north. 17th Street NW between Newton Street NW and Piney Branch Parkway will only be open to local traffic and residents. The Piney Branch Tunnel is a major infrastructure project designed to reduce combined sewer overflows and improve water quality in Piney Branch, Rock Creek, and the Potomac River.
The four-year infrastructure project, which will continue through 2029, is part of the DC Clean Rivers long-term investment in cleaner water, healthier communities, and a more resilient wastewater system. Once implemented, the project will reduce untreated discharges into Piney Branch by an estimated 96% and limit the frequency from twenty-five events to one in a year of average rainfall. ”
DC Water Piney Branch Parkway Closure Construction Tunnel Alternate Routes Pedestrian Path
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