When the Blue Plains Tunnel went online, the Tunnel Dewatering Pump Station (TDPS) and Enhanced Clarification Facility (ECF) began accepting the millions of gallons of combined sewage that previously flowed into the District’s waterways during heavy rain storms. D.C. undertook the massive $215-million Pump Station construction project so that the combined sewage flow could receive treatment. The construction included a multi-story 165-foot-deep pump station housing the main tunnel dewatering pumps and other supporting mechanical and electrical equipment, instrumentation, and control systems. The ECF includes a process treatment system and mechanical, electrical, and instrumentation control equipment.

In support of this effort, F&R conducted materials testing and inspections of the various construction elements, including driven H-piles, drilled piers, soils, concrete formwork, reinforcing steel, cast-in-place concrete, precast plant inspections and QC review, structural steel, welding, steel decking, light gauge steel framing, masonry, aggregate, and asphaltic pavements.