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: Cottonwood Substation

Cottonwood Substation

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

Vail Substation

TEP is seeking approval from the City of Tucson to rezone land adjacent to the Vail Substation, located near Interstate 10 and South Rita Road, to accommodate the construction of new 230-kilovolt substation facilities.