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Reliability Upgrades
Construction Projects
We continuously work to improve our systems and service throughout Arizona to support reliability for our customers. We are committed to keeping customers, communities and stakeholders informed about upcoming projects around the state. Learn more about our future-focused projects that support reliable service for customers.
Central Phoenix Line Upgrade
Oak Creek to McGuireville 69kV Project
To support reliability, we plan to build a new 69kV power line to connect the Oak Creek substation (near Highway 179 and Jacks Canyon Road) and McGuireville substation (near Cornville Road and Restoration Loop). Construction will begin Summer 2025. View the project website.
Walker Road Upgrade
Natural Gas Projects
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.
Natural gas can provide flexible, on-demand energy, including during the late afternoon and evening hours when customer energy use is highest. Through our competitive procurement process, we’re evaluating these projects and additional resources to support Arizona’s growing energy demand and protect reliability and affordability for customers.
- Desert Sun Power Plant Project - We plan to build a new natural gas plant, the Desert Sun Power Plant, west of Gila Bend. The Desert Sun site would be capable of adding up to 2,000 megawatts (MW) of reliable and flexible generation to the state’s energy portfolio. Construction is expected to begin in 2028. View the Desert Sun project website.
- Redhawk Project - We propose to build eight new natural gas units at our existing Redhawk Power Plant southwest of Phoenix to support reliable service for customers. The units will add approximately 397 MW of capacity to the energy grid by 2028 - enough to serve 63,520 Arizona homes. View the Redhawk project website.
- Sundance Project - The Sundance Power Plant, located 55 miles southeast of Phoenix near Coolidge, is a key component of our energy infrastructure. We are adding two additional natural gas units at Sundance – adding 90 MW, enough energy to serve an additional 14,400 Arizona homes by spring 2026. View the Sundance project website.
Downtown Phoenix Substation Projects
Several interconnected substation projects and related powerline upgrades in Phoenix support reliable service in the bustling downtown.
- Evans Churchill Substation - Located at 7th Street and Roosevelt Street, the distinctive “Roosevelt Row” substation upgrade was completed in 2022. We continue to work on powerline upgrades that serve critical customer projects downtown. Those powerline upgrades are expected to be completed in January 2026.
- Garfield Substation - Garfield Substation is located near 2nd Street, south of Roosevelt to Garfield. The demolition and rebuild of Garfield Substation will follow the energization of the new Evans Churchill network. The new substation design includes a multi-use component on Roosevelt Street. The design also includes active pedestrian space, public art and shade. Engineering, permitting and neighborhood outreach will take place throughout the project. We expect this project to be complete in late 2027. View project web site.
- Grant Street Substation - This project will expand the footprint for the three Lincoln Street substations at 4th Avenue and Lincoln Street. Construction is scheduled to start in the Spring of 2026. View project website.
Line Siting Projects
