Cottonwood Substation

TEP plans to build a new 138 kilovolt (kV) substation and upgrade existing facilities in the City of Tucson to strengthen electric reliability for customers and meet growing electric demand in southwest Tucson.

Through long-term planning studies, the company has determined that new infrastructure will be required to support residential and commercial development in the area. TEP will install these improvements in two phases:

Phase 1 (Begins spring 2019): TEP conducted a detailed study within the area to identify potential sites for a new, permanent substation, power poles and other infrastructure. TEP held a public meeting about the project in June 2022. TEP must obtain a special exception land use permit from the City of Tucson before construction can begin.

Phase 2 (2020-2024): TEP will conduct a detailed study within the area to identify potential sites for a new, permanent substation, power poles and other infrastructure. Prior to construction of the permanent substation, TEP must hold a public meeting and obtain a special exception land use permit from the City of Tucson. More information will be provided to area residents in the near future.

The Cottonwood Substation will connect to TEP’s existing 138 kV transmission system and help improve reliability for customers in the area by reducing the stress placed on existing circuits currently supported by the Midvale, Santa Cruz and Shannon substations. These upgrades also are designed to support nearby commercial development.

If you have any questions, please contact TEP Land Resources Environmental & Land Use Planner Brian Pugh at 520-460-6417.