What is the Saguaro to Marana 115/138kV Transmission Line Project?

AEPCO and Tucson Electric Power (TEP) are planning new electrical infrastructure to serve the town of Marana, Arizona and the surrounding area in Pima County. The Project consists of two separate transmission line projects, which may be built on the same structures in select areas. The Project requires:

  • A new AEPCO 115 kilovolt (kV) transmission line between the planned Trico Electric Cooperative Inc. Adonis Substation and existing AEPCO Marana Substation. The Project will connect to the existing Saguaro Substation located approximately 7 miles northwest of Marana using an existing transmission line.
  • A new TEP 138kV transmission line connecting to a planned TEP substation in the Town of Marana near the intersection of Grier Road and Sanders Road.