Electric Transmission

It takes a solid, reliable electric transmission system to deliver power from our plant to our member distribution electric coops, and on to their member-consumers at the end of the line.

We deliver wholesale electric power from the Apache Generating Station in Cochise, Ariz., to our six member distribution co-ops, which serve members in Arizona, California, and New Mexico. Here are a few facts about our system.

  • 620 miles electric power transmission line
  • 26 substations
  • 30 telecommunications towers
  • 35 transformers, including partial ownership transformers
  • 2,995,547 installed kVA capacity
AzGT linemen install a new transformer at the Greenlee substation
AzGT linemen install a new transformer at the Greenlee substation, in Greenlee County north of Duncan Valley

We have always been a leader in transmitting safe, reliable electric service, and we continue to find ways to enhance service and save costs. Electric co-op consumers across Arizona are benefiting from our work on the smart grid, which enhances electric reliability. The smart grid helps us detect problems more quickly and leads to fewer outages. It also helps us hold down costs.

In partnership with two member electric coops, we were awarded $32 million in stimulus grant funding from the U.S. Department of Energy to help us continue building the smart grid. Our partners were Sulphur Springs Valley Electric Cooperative, Inc. and Mohave Electric Cooperative, Inc. The grant enhanced smart grid technology on more than 6,400 miles of electric power transmission and distribution power lines. The work involved adding fiber optic communications over our lines and further automating substations, boosting our ability to digitally monitor and control our network from remote locations. Grant-related work was completed in 2014.

Delivery reliable electricity requires a lot of communication. We communicate with our network and with our members through 30 telecommunications towers based along our lines. An employee in Bullhead City can talk to another team member in Safford, and both can view the status of various points along our network in real time.

We depend on high-tech systems more than ever. Our engineering team uses new GPS-based LIDAR mapping technology that takes extremely precise measurements of our network. As a result, parts of the network can carry added load without the need for costly upgrades.