Redhawk Power Plant Expansion Project

Location: Arlington, AZ
Estimated Completion Date: Spring 2028

Project description

APS proposes to expand its existing Redhawk Power Plant. The expansion includes the addition of eight new natural gas units, adding up to 397 megawatts (MW) to the energy grid by 2028 – enough to serve 63,520 Arizona homes.

Project need

There is significant growth in demand for energy in our service territory, and we are preparing to meet nearly 40% load growth by 2031. These new units will provide much-needed energy during the late-afternoon and evening hours, when customer energy use is highest. We are committed to providing reliable and affordable service and use a rigorous selection process and detailed analysis to determine the best combination of resources to serve customers. Our natural gas fleet is an important part of a diverse energy mix and a critical partner to the large quantities of solar and battery energy storage we’re adding to our system.

These new units are necessary to support the reliable service our customers count on. Modern natural gas units, like those planned for this location, provide flexible, on-demand energy when customers need it most.

The Redhawk Power Plant is a key component of our energy infrastructure. Adding additional units at Redhawk maximizes the current infrastructure and gas pipeline capacity to generate reliable energy for Arizona.

Certificate of Environmental Compatibility

APS’s Certificate of Environmental Compatibility (CEC) application was reviewed by the Arizona Power Plant and Transmission Line Siting Committee in a public hearing that began on August 19, 2024 and concluded on August 22, 2024. The hearing was livestreamed each day, and a public comment session was held on August 19, 2024. The public was invited to participate and/or attend in person or virtually.

After the hearing, the Arizona Power Plant and Transmission Line Siting Committee granted a Certificate of Environmental Compatibility for the Redhawk Power Plant Expansion Project on August 22, 2024. The CEC was then considered by the Arizona Corporation Commission (ACC) at an Open Meeting on October 8, 2024, where it was approved.

Pending review of the air permit by Maricopa County, we expect construction to begin in 2026.