Combined-Cycle Power Plant Construction Completion & Commissioning Day & Zimmermann Day & Zimmermann provided construction services, safety services, procurement, instrumentation, document control, quality control, supervision, and labor to support construction completion, commissioning, and start-up of a 440 MW combined-cycle power plant in the Northwest. The plant is responsible for approximately 10 percent of the utility’s generation capacity. The facility uses a highly efficient combined cycle system, with one turbine running off the combustion of natural-gas and the other running off of steam. D&Z supported work on several systems and plant equipment, including the combustion turbine generator, reheat steam turbine generator, auxiliary boiler, selective catalytic reduction (SCR) and

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