Corporation Commission Greenlights Innovative Above-Ground Midtown Reliability Project in Tucson

By Matthew Holloway |

On September 5th, the Arizona Corporation Commission (ACC) unanimously approved a Certificate of Environmental Compatibility (CEC) for the Tucson Electric Power’s (TEP) Midtown Reliability Project, an initiative aimed at upgrading the region’s power infrastructure. Led by Republican Commissioner Nick Myers, the decision marks a significant step towards enhancing the electric grid in Tucson.

The Midtown Reliability Project involves replacing outdated 46 kV transmission lines with a more advanced 138 kV monopole line. This upgrade is essential as existing lines struggle to meet current energy demands. The project will add approximately 12 miles of overhead lines while removing 19 miles of older infrastructure, according to a release from the Commission.

Despite the approval, the project has sparked debates within the community. Some residents have advocated for a partially underground route, which would significantly increase project costs, necessitating additional fees for consumers. Commissioner Myers acknowledged the community’s concerns but emphasized the need to avoid imposing the $67 million burden of underground construction on TEP customers. He stated that undergrounding is not essential for safety or reliability.

TEP outlined the approved route, which will mainly follow West Grant Road, North Park Avenue, Euclid Avenue, and East 36th Street, connecting two substations to the planned Vine Substation north of the University of Arizona. An interactive map of the designated corridors is available online for public viewing.

With the demand for energy increasing, TEP aims to complete the project by the summer of 2027. This timeline is critical for maintaining service reliability in the growing community.

ACC Chairman Jim O’Connor complimented all parties involved for working collaboratively to ensure the project’s progression, highlighting its importance for modernizing Tucson’s electric grid.

Community opposition remains a factor, with concerns over property values influencing some residents’ preferences for underground lines. Acknowledging these sentiments, the ACC reaffirmed its commitment to shielding ratepayers from additional financial impacts related to the project.

Matthew Holloway is a reporter for AZ Free News. Follow him on X for his latest stories, or email tips to Matthew@azfreenews.com.