Pepco Waterfront Substation 223

With thriving Capitol Riverfront and Southwest Waterfront neighborhood developments underway, Pepco’s Waterfront Substation 223 in Buzzard Point was constructed to meet the anticipated electrical usage demands of customers. Construction on the four-acre site consisted of a 93,419-square-foot substation, as well as phase shifter yard.  The design-build project, which was completed December 2017, was awarded to Coakley Williams Construction. MGMA was the architect.

In our role as geotechnical engineer, we worked directly with Coakley Williams and their joint venture partner ABB to provide extensive subsurface exploration, foundation design, and construction administration services.  Strict settlement requirements and varying subsurface conditions resulted in the structure being founded on a combination of auger cast piles, traditional spread footings, and spread footings founded on compacted aggregate  piers.

Completed project images © Jason Flakes