Project Overview

Ironwood Transmission Line

The proposed Ironwood Transmission Line would span a portion of Yuma County, Arizona, and southern Imperial County, California, transmitting reliable, low-cost, clean energy to homes and businesses across Southern California.

The California Independent System Operator (CAISO), the regional electric grid operator, selected Horizon West Transmission in 2024 as the project sponsor to finance, construct, own, operate and maintain a new approximately 80-mile, 500-kilovolt transmission line that would increase access to renewable energy resources east of California and unlock the vast renewable resource potential in Imperial County. The proposed Ironwood Transmission Line project is part of a portfolio of electric transmission projects that the CAISO has identified as necessary to meet the future needs of the region’s electric grid.

The Ironwood Transmission Line will help maintain the reliability of the regional electric grid, meet future energy demands and help California reach its clean energy goals. The proposed project is anticipated to be in service in 2030.

As an existing utility in California, Horizon West has experience working closely with local California communities, landowners and key stakeholders. Horizon West believes an ongoing community dialogue will be instrumental to the success of the project and values the public input that will support regulatory decision-making for the project.

We want to hear from you!

Horizon West is 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. Please fill out this short survey to let us know your thoughts.