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Power line siting projects

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Here’s a look at the current siting projects, as well as some completed siting projects. As you’ll see, providing reliable and affordable energy across the state keeps Arizona powered.

Current Siting Projects

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Runway 230kV

Improve reliability and increase the ability to serve continuing economic growth in the West Valley.

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Proving Ground Solar and Storage 500kV Interconnect

Interconnect the Proving Ground Solar and Storage power plant site to the Hoodoo Wash Switchyard.

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Merrill to Coolidge 69kV Transmission Line Project

The project will connect the Merrill and Coolidge substations to create a looped system improving reliability in the region.

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Completed Siting Projects

 

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Biscuit Flats Project

Improve reliability and increase the ability to serve new growth in the North Phoenix area.

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North Gila to Orchard to Yucca

Improve electrical capacity and reliability in the Yuma area; may potentially accommodate the development of renewable energy projects in the region.

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Perryville to Valencia

Connect the Perryville Substation to the Valencia Substation, ensuring a reliable power source for the future.

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Sundance to Pinal Central

Increase electrical capacity and improve the reliability in the area.

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Three Rivers 230kV

Connect new power lines and substation into an existing 230kV transmission line.

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West Valley North

Increase electrical capacity and improve reliability in the area.
 

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Hoodoo Wash 500kV Interconnection

Interconnect the McFarland Solar power plant site to the Hoodoo Wash Switchyard

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West Valley Central 230kV Connection Project

Improve reliability and increase the ability to serve new growth in the West Valley area.

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West Valley South

Increase electrical capacity and improve reliability in the area.
 

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North Peoria 69kV

Build four new substations and interconnecting 69kV power lines.

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Westwing 230kV Interconnection Project

Interconnect separate customer proposed battery electrical storage projects to the existing Westwing Substation.

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Freedom to Willis 69kV

Improve reliability and strengthen the regional electrical system.

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Cyclone/Wildcat

Connect two new customer-driven projects into the existing 230kV transmission line.

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Frequently Asked Questions about Projects
Learn more about power and reliability updates, plus relevant resources to answer your questions.

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