Oregon Clean Energy: Combined Cycle Fuel-Fired Power Plant

Oregon, Ohio


As a subcontractor to Construction Manager, Black & Veatch, Mosser completed the substructures package for this project. This included completing 1,200 auger cast piles, 110 drilled piers, and all concrete associated with the project, which amounted to approximately 23,000 cubic yards.

Mosser self-performed all concrete work associated with the project which entailed completing underground duct banks, pile caps, slabs, and large foundations for the equipment associated with the plant. Some of the large concrete work included the Steam Turbine Generator (STG) foundation, two Combustion Turbine (CT 11 and 12) foundations, two Heat Recovery Steam Generator (HRSG 11 and 12) foundations, the cooling tower foundation, and main building slab.

The STG was the most complex foundation, consisting of many large pours such as a 5’ thick, 300 cy pour with three condensate cans in the pour. Above and around this STG condensate trench pour was the STG base mat, also 5’ thick, using 650 cy of concrete. On the base mat were eight pedestals, 8’ x 6’ and 30’ tall. On top of the eight pedestals was a large 8’ thick tabletop slab. This was a more complex pour as it was elevated nearly 40’ in the air and had a tremendous amount of resteel, embedded plates and anchor bolts. Mosser used EFCO steel formwork and supports to complete this pour.

“The breadth and depth of Mosser Construction’s knowledge and proven execution qualifies them to implement complex projects in a safe manner. I am pleased to recommend them as a subcontractor for future work.”

 Barry Clegg, Black & Veatch, Construction Manager for the Oregon Clean Energy Project