The California Independent System Operation, the regional electric grid operator, recently selected Horizon West Transmission to build and operate an approximately 80-mile electric transmission line to improve the reliability of the local electric grid and provide access to low-cost renewable energy. The project will also spur job opportunities and investment in the community while generating additional opportunities for economic development.

The Ironwood Transmission Line would connect existing electric transmission infrastructure in Yuma County, AZ, with existing infrastructure in Imperial County, CA. The proposed transmission line would also support California’s clean energy goals to have 100% renewable energy and zero-carbon resources supply the state’s electricity by 2045.

We are currently conducting a detailed study to identify potential routes and want your input on issues that are important to you, as well as potential areas and landmarks you care about. Your input will help us identify potential routes that are considerate of the natural, cultural and social environment. Scroll below to view the Ironwood Transmission Line draft route options that have been identified after field reviews, technical studies and initial public input. Please let us know your thoughts on these routes! You can leave your comments on the map.

There will be additional opportunities, both through our routing study process and those with the California Public Utilities Commission and Arizona Corporation Commission, to provide feedback. Open houses were hosted on February 19 and 20, 2025, and additional open houses are planned for April 30 and May 1, 2025. For more information on the project, please visit the project website at ironwoodtransmission.com. We encourage you to attend the open houses to provide your input.