Irvington to Kino 138-Kilovolt Transmission Line and Kino Substation Projects

New and improved transmission resources for continued reliability.

Tucson Electric Power (TEP) has proposed building a new 138-kilovolt (kV) transmission line and substation and upgrading existing facilities in the City of Tucson to strengthen electric reliability for customers and, in particular, to meet growing energy needs in the area of South Kino Parkway and East 36th Street.

The proposed transmission line is the first of several system improvements designed to provide additional transmission capacity in the central portion of the Tucson metro area. Phase 1 will extend approximately 4 miles from TEP’s Irvington Campus to the proposed Kino Substation, which would occupy approximately 3.5 acres at the southeast corner of South Kino Parkway and East 36th Street.

Application for a Certificate of Environmental Compatibility

The Arizona Power Plant and Transmission Line Siting Committee issued a Certificate of Environmental Compatibility (CEC) during a public hearing held June 12-14, 2018 in Tucson. The Arizona Corporation Commission reviewed and approved the CEC in August 2018.


Public Outreach Materials

TEP has made continual efforts to educate members of the community and the public about this project through briefings and presentations with community leaders, public open house meetings, stakeholder workshops, newsletters and other channels.


Why does TEP need to build a new transmission line and substation?  

TEP studies indicate that existing infrastructure is insufficient to serve customers’ expected future peak demands for power. TEP first identified the need for the new transmission and substation facilities in 2007, when it concluded that growing demand for power in the area would require new infrastructure to satisfy customers’ energy needs. TEP estimates that new infrastructure will be needed within five years to support expected development in the area.

What benefits would this project provide to the community?

These new and improved facilities would provide:

  • Additional electric infrastructure to accommodate future growth and economic development in the area.
  • A stronger, more flexible electric system for continued reliability.
  • Support for Pima County to build and maintain a passive open space park near South Campbell Avenue and East 36th Street.