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Coolidge Generating Station, Phoenix, Arizona One of the Largest Power Plants in U.S. Capable of Rapid 10-Minute Startups The Salt River Project (SRP) is a publicly owned utility supplying water and power primarily to the greater Phoenix, Arizona area. To meet demand during the extremely hot summer months, the project required the green field erection of a nominal 575 MW peaking plant for exporting power exclusively to the Salt River Project. The simple-cycle peaking power plant at the Coolidge Generating Station uses 12 of GE’s LM6000PC SPRINT NXGEN combustion turbine-generators with evaporative cooling power augmentation to supply electricity to 500,000 homes. At the push of a button during peak demand, all 12 natural gas-fired turbines can start up in just 10 minutes—making this one of the largest plants in the U.S. capable of such rapid startups. With average ambient temperatures exceeding 100°F, the plant can continue to operate at temperatures as high as 122 °F or as low as 15°F.

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