DC Water Blue Plains Tunnel


Washington, D.C.


Civil Engineering

Project Size

24,300 linear feet

Completion Date


Total Cost

$319 Million


Parsons Brinckerhoff

Wiles Mensch Corporation – DC (WM) provided survey and civil engineering services in support of the design and construction of the DC Water Blue Plains Tunnel (BPT). The project was a segment of DC Water’s Combined Sewer Overflow (CSO) Long Term Control Plan (LTCP). The LTCP includes a system of tunnels for the Anacostia River, Rock Creek, and Potomac River, which captures combined sewer overflow for treatment at Blue Plains. Project completion included construction of over 24,300 linear feet of reinforced concrete tunnel.

WM provided a boundary, topographic, and utility survey of the 170-acre site, as well as stake-out services. An as-built survey was also provided for the site, including tunnel and shafts per DC Water standards.
Civil services provided by WM include demolition plans, layout plan and controls, pavement and grading plans, utility relocation plans, utility profiles, stormwater management design, and sediment and erosion control plans. WM was also responsible for routing and obtaining the necessary approvals from utility providers, DC Water, DOEE, and DDOT.

The Blue Plains Tunnel Project received the Engineering News Record (ENR) 2016 Best Project Award for the Mid-Atlantic Region for Water/Environment. The project was selected by industry judges that evaluated a large number of projects according to overcoming challenges, contribution to the industry and community, safety, and quality.

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