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Please visit Rocky Mountain Power and Idaho Power's Gateway West project website. Visit the Proponents’ Parcel Search Map to search by private land owner, organization, or address and to zoom in along the routes.

Segments 8 and 9 – BLM Idaho

The BLM is postponing a decision on Segments 8 and 9 so routing can be resolved in this area. Visit the BLM Idaho website for updates on the siting process for these segments.

About this project

The Bureau of Land Management (BLM) and U.S. Forest Service (USFS) Caribou-Targhee, Medicine Bow-Routt and Sawtooth National Forests are conducting the National Environmental Policy Act (NEPA) process for the proposed Gateway West Transmission Line Project. The BLM is the lead federal agency for the NEPA process.

NEPA Process

The Record of Decision (ROD) was released on November 14, 2013. The ROD identifies the BLM authorized route on public lands for Segments 1 through 7 and Segment 10. As explained in the ROD and initially presented in the final EIS, the BLM has chosen to pursue a phased decision for the project, deferring the decision for Segments 8 and 9 until a later date. Visit the BLM Idaho website for updates on the siting process for these segments.

The final environmental impact statement (EIS) was released on April 26, 2013. The release of the document began a 60-day public comment period which closed Friday, June 28. Public comments received by the BLM on the final EIS are available to search and view on this website. Responses to these comments are found in the ROD.

The BLM released the draft environmental impact statement (EIS) for the project on July 29, 2011, which was followed by a 90-day public comment period and 17 public meetings throughout the project area. Public comments received by the BLM on the draft EIS are available to search and view on this website.

Project impacts to sage-grouse were analyzed and incorporated in the draft EIS as part of the "Analysis Framework for Interstate Transmission Lines" (Appendix J). All components of the Analysis Framework were presented in the draft EIS, with the exception of the habitat equivalency analysis (HEA), released on June 29, 2012 as part of a Sage-Grouse Addendum to the draft EIS. The BLM incorporated comments received on the sage-grouse analysis into the final EIS. The BLM also hosted two public meetings in February 2012 to present information and answer questions regarding the status of the sage-grouse HEA at that time. View information made available at those meetings.

The BLM identified the agency preferred alternatives for the project in August 2012. Preferred alternatives were selected after reviewing draft EIS comments, coordinating with local, state and federal governments and cooperating agencies, briefing BLM Washington Office program and policy staff, and considering changes to the proposal identified in a February 10, 2012 letter from the Proponents.

Project Overview

This project is jointly proposed by Idaho Power and Rocky Mountain Power. The companies plan to construct and operate 230 and 500 kilovolt (kV) transmission lines from the Windstar Substation near Glenrock, Wyoming to the Hemingway Substation near Melba, Idaho.

The proposed project is composed of 10 transmission line segments with a total length of approximately 1,000 miles across southern Wyoming and southern Idaho. The proposed line crosses approximately 500 miles of public land managed by the BLM, including 300 miles in Idaho and 200 miles in Wyoming. In February 2012, Rocky Mountain Power and Idaho Power submitted a revised project application to update their originally proposed routes, as presented in the DEIS. All route changes and updates to the plan of development (POD) will be analyzed in full in the FEIS.

Cooperating Agencies

Cooperating agencies include the U.S. Forest Service; National Park Service; U.S. Fish and Wildlife Service; U.S. Army Corps of Engineers; State of Wyoming; State of Idaho; Idaho Army National Guard; Cassia, Twin Falls and Power counties, Idaho; City of Kuna, Idaho; Elko County, Nevada; Carbon, Lincoln and Sweetwater counties, Wyoming; and the Saratoga-Encampment-Rawlins and Medicine Bow conservation districts in Wyoming.

For questions or to share additional information about the project please email: Gateway_West_WYMail@blm.gov.

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