This project is jointly proposed by Idaho Power and Rocky Mountain Power to build and operate approximately 1,150 miles of new high-voltage transmission lines between the Windstar Substation near Glenrock, Wyoming and the Hemingway Substation near Melba, Idaho. The project would include approximately 300 miles of 230 kilovolt (kV) lines in Wyoming and approximately 850 miles of 500 kV lines in Wyoming and Idaho.

Idaho Power and Rocky Mountain Power are building this new transmission line to provide electricity to meet increasing customer needs. It will deliver power from existing and future electric resources including renewable resources such as wind energy. In addition, the line will provide strength and reliability to the region’s transmission system. The project is scheduled for line segments to be completed in phases between 2014 and 2018.

This website contains important facts about the project, the companies and maps. Updates will be posted as new information becomes available, so check back often!

Our latest project newsletter has been distributed by mail and/or e-mail to landowners and interested parties. Please view the newsletter online or request a copy. To receive future newsletters and project updates, please join our mailing list.

Subscribe to this feed