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Testing

Power line siting

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Anticipating energy needs

As Arizona grows, we must plan and build new power lines to safely and reliably meet our customers’ energy needs. Our 10-year Transmission System Plan describes the high voltage and extra high voltage projects we’re planning for the upcoming decade to provide energy when and where it’s needed.

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Current and completed siting projects

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.

How we determine locations for infrastructure

CEC process

Find out more about power line projects with voltages of 115 kV or greater, which are regulated by the Arizona Corporation Commission.

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Frequently asked questions

Learn more about power line siting and relevant resources to answer all of your questions.

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Siting selection process

The process for building new power lines accounts for engineering, land acquisition, cost, public comment, environmental concerns and regulatory approvals.

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