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Coolidge Expansion Project

See how new generation infrastructure will help meet growing power demand.

See how new generation infrastructure will help meet growing power demand. To contact SRP about this project, please call (888) 705-1509.

About the project

Salt River Project Agricultural Improvement and Power District (SRP), a community-based, not-for-profit utility based in Tempe, Arizona, is applying for a Certificate of Environmental Compatibility (CEC) for the expansion of the Coolidge Generating Station.

The Coolidge Generating Station is a natural gas power plant near Coolidge, Arizona, that was built between 2009 and 2011. SRP purchased the plant in 2019 to help support growing demand for power in the region.

The proposed Coolidge Expansion Project (CEP) will allow SRP to meet the significant near-term increase in energy needs in its service territory, which is among the fastest growing regions in the nation. In addition, the CEP will enable the addition of more renewable resources (such as solar and wind) while maintaining a reliable power grid.

A virtual open house is available and can be viewed on-demand, 24 hours a day.


As part of the CEC process, SRP is seeking public input for the Coolidge expansion, which would include construction of up to 820 megawatts (MW) of new power generation produced by 16 gas turbines.

Contact us

If you have questions about the project, please contact us or call (888) 705-1509.