Substation from above
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Substation Projects

Grid Improvements for More Reliable Service

Substations change the voltage of electric facilities for transmission, distribution and delivery of electric service to area customers.

TEP’s proposed substation projects are designed to enhance our local energy grid while preparing for our community’s future energy needs. Public outreach is an important part of TEP’s planning process. Click below to learn more about current projects.

Tucson Electric Power: Harrison Substation

Harrison Substation

TEP has proposed building a new 138-kilovolt (kV) substation at the northwest corner of North Harrison Road and East Speedway Boulevard.
Tucson Electric Power: Cottonwood Substation

Cottonwood Substation

TEP plans to build a new 138 kilovolt (kV) substation and upgrade existing facilities in southwest Tucson.
Tucson Electric Power: Vine Substation

Vine Substation

The new substation will interconnect with TEP’s planned Kino to DeMoss-Petrie 138 kV Transmission Line Project.
Tucson Electric Power: Patriot Substation

Patriot Substation

TEP plans to build a new 138-kilovolt (kV) substation that will help Davis-Monthan AFB meet Department of Defense-mandated energy resiliency directives, replace aging infrastructure and strengthen electric reliability.