Landowner: two-mile wide study corridor with parcel ownership

Route: corridor by region or state

Segment: routes by segment with ownership types

Constraints: routes with features that restrict routing


The proposed Gateway West Transmission Line Project will span approximately 1,000 miles from the Windstar substation east of Casper near Glenrock to the new Hemingway substation southwest of Boise near Murphy.

The maps below reflect the BLM’s authorized routes for segments 1 through 7 and 10 identified in the Record of Decision (ROD) released in November 2013, as well as the authorized routes identified in the January 2017 ROD for segments 8 and 9. On April 17, 2017, the Interior Board of Land Appeals (IBLA) remanded the January ROD back to the BLM Idaho State Office for reconsideration of the route alternatives. See route information to learn more.

These maps will be updated as the environmental review process progresses.

Parcel Search: This map is searchable by name, parcel number or address and outlines parcels in relation to the project study corridor. This map shows the BLM authorized route for segments 1 through 7 and 10 and the routes identified in BLM’s January 2017 ROD, which was remanded for reconsideration in April 2017.

Project Overview Map: This map shows an overview of the project area and routes. This map reflects the BLM’s authorized routes identified in the Records of Decision released in November 2013 and January 2017.