Ulliman Schutte, Brown and Caldwell Awarded Sewer Rehabilitation Contract in D.C.

WASHINGTON D.C. — The design-build team of Ulliman Schutte and Brown and Caldwell has been awarded a contract by DC Water to provide design, engineering, and construction services for the rehabilitation of a deteriorating segment of the Potomac Interceptor. 

The Potomac Interceptor (PI) is a component of DC Water’s sewer network conveying an average daily wastewater flow of 60 million gallons per day (MGD). Its 50-mile service area extends from the Washington Dulles International Airport through multiple northern Virginia and Maryland counties to the Blue Plains Advanced Wastewater Treatment Plant, where flows are treated before discharge into the Potomac River.

Following its inspection of the entire PI, DC Water is performing numerous sewer rehabilitation projects as part of a Capital Improvement Program to improve the District’s sewer infrastructure.

For this effort, a buried section of the PI along the historic Potomac Heritage Trail, which accepts flows from Virginia’s Fairfax and Loudoun Counties, and Maryland’s Montgomery County, will be rehabilitated and renewed.

The design-build team will design the repair and renewal of 600 linear feet of 54 to 78-inch diameter pipe as deep as 65-feet below grade.

“In the true spirit of collaboration, the team is honored to have the opportunity to contribute to the success of DC Water’s long-term asset resiliency planning,” said Brown and Caldwell Senior Vice President Carey Allen.

Design phase activities are expected to be completed in 2021.

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