Transmission Line Project

The Chimney Canyon Solar and Transmission Line Project (Project) will support a more reliable grid for Navajo County and the greater Arizona system. The Project will carry electricity from the proposed solar array to the existing Cholla Substation and/or the proposed APS Sitgreaves Switchyard. This Project will require a Certificate of Environmental Compatibility from the Arizona Corporation Commission to be filed October 2025 and is seeking public feedback to support the Project's application.

Transmission Line Project Characteristics

Up to two routes
to be developed
Each route anticipated to be up to
9 miles with a 200-foot wide right-of-way
Pole structures anticipated to be mostly monopole design, up to 200-ft in height, and spaced approximately 800 - 1,000-feet apart
Multiple potential transmission routes
are under analysis

Project Timeline

  • File Certificate of Environmental Compatibility application in October 2025.
  • Arizona Transmission Line Siting Committee Public Hearing scheduled for December 15 – 19, 2025.
  • Construction anticipated to begin as early as Q1 2027.

Public Involvement

Join us on May 22, 2025 at 6:00 pm MST for a Virtual Open House using the links or call-in numbers below!

Join Zoom Meeting
https://zoom.us/j/92166997646?pwd=06om9uNbyJ6HdmE8yRUIjyIFDmptPQ.1
‍
Meeting ID: 921 6699 7646  |  Passcode: 692536

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Meeting ID: 921 6699 7646
Passcode: 692536

Find your local number: https://zoom.us/u/a421CFaPi

Project Materials

Check back soon as more materials are posted!

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