Gateway West Transmission Line | Segments 8 and 9








The BLM is preparing a supplemental environmental impact statement (EIS) analyzing new information associated with the potential impacts of approving a right-of-way (ROW) application for segments 8 and 9 of the Gateway West transmission line project.

Rocky Mountain Power and Idaho Power have submitted a revised application and revised plan of development for segments 8 and 9. The BLM determined that this new information warrants additional analysis and public review under the National Environmental Policy Act.

     With completion of scoping, the schedule for the supplemental EIS
      (SEIS) has been revised.
  • The draft SEIS will be published in September 2015 (rather than June). 
  • There will be a 90-day public comment period on the draft SEIS (September-December 2015), with public meetings during that time. 
  • The final SEIS will be published in April 2016, with a Record of Decision (ROD) in June 2016. 

    The revised schedule will not allow for any extension of the comment period 
     on the draft SEIS.

scoping map of project area for Gateway West supplemental EIS

 SCHEDULE at a glance
¦ Notice of Intent  09.19.2014
¦ Scoping  closed 10.24.2014
Draft Supplemental EIS
  Public comment
  Final Supplemental EIS
  Protest period
  Record of Decision

  transmission line towerREAD |
Scoping Report

Snake River from the south bank, near Murphy, Idaho

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Segments 1-7 and 10 
The BLM has authorized routes for these segments. The BLM-Wyoming website has more information.

Mailing List
Join the mailing list to receive updates and announcements about the supplemental EIS.

Proponents' website
The Rocky Mountain Power–Idaho Power website for the Gateway West project has additional information.