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Power Line Siting
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.
2025-2035 10-Year Transmission System Plan
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.
Frequently Asked Questions
Learn more about power line siting and relevant resources to answer all of your questions.
Siting Selection Process
The process for building new power lines accounts for engineering, land acquisition, cost, public comment, environmental concerns and regulatory approvals.
Strategic Transmission Expansion
To prioritize reliability and meet substantial growth in residential and commercial energy needs, APS has developed a future-focused Strategic Transmission Expansion (STX) portfolio. These projects represent a significant upgrade to our transmission system.
