Gateway West

The Gateway West project is jointly proposed by the company and Idaho Power to build and operate approximately 1,000 miles of new high-voltage transmission lines in Wyoming and Idaho. It is comprised of two major line segments:

Windstar to Populus, Segment D, will stretch approximately 488 miles starting at the Windstar substation near Glenrock, Wyoming, proceeding south to Medicine Bow and then spanning across southern Wyoming to the Populus substation near Downey, Idaho. This segment will include seven expanded or new substations and will enable access to existing and new generating resources, including wind, and will deliver electricity from these sources to customers throughout both companies' service territories.

Populus to Hemingway, Segment E, originates at the Populus substation near Downey, Idaho, and includes two transmission lines that run approximately 502 miles across Idaho to the Hemingway substation near Melba, Idaho. The Populus to Hemingway segment will include five expanded or new substations, and will enable access to existing and new generating resources, including wind, and will deliver electricity from these sources to our customers.

Project Timeline

  • Public Scoping – June 2008
  • Environmental Impact Statement – 2007 - 2013 
  • Public outreach – June 2008 through project completion
  • State and local permitting and obtaining rights of way – To be determined
  • Estimated line in service for customers – 2019 - 2024

Additional Information About the Project

Under the National Environmental Policy Act, the Bureau of Land Management (BLM) has completed the Environmental Impact Statement (EIS) for the Gateway West project. The BLM released its final EIS on April 26, 2013, followed by the Record of Decision on November 14, 2013, providing a right-of-way grant for most of the project. The agency chose to defer its decision on the western-most portion of the project located in Idaho in order to perform additional review of the Morley Nelson Snake River Birds of Prey Conservation Area. The BLM is currently conducting a supplemental environmental analysis for Segments 8 & 9 of the project which encompasses that area. See below for additional information on public participation and project history, and visit the BLM's website for more information.

Public Participation

Public input is an important part of the transmission line development process and is welcomed at all stages. In addition to public, group and individual meetings, project materials and newsletters also have been sent to more than 11,000 landowners and other interested parties throughout this process and will continue through the end of the project with continued web page and newsletter updates.

For a comprehensive list of meetings, publications and other public outreach, can be found on our Gateway West website.

To be placed on the mailing list or to submit an official public comment on the Gateway West Transmission Line Project, please contact the BLM directly at:

Bureau of Land Management
Gateway West Project
P. O. Box 20879
Cheyenne, WY 82003
Or email Gateway_West_WYMail@blm.gov

To contact Rocky Mountain Power about this transmission project, please call the major construction projects message line at 801-220-4221, or email ConstructionProjects@pacificorp.com. Please be sure to include the project name – "Gateway West project" – in your inquiry.

Gateway West


Updated maps can be viewed below:

Further information also can be found at our Gateway West website

Project History


2007

  • May – PacifiCorp and Idaho Power filed an application with the Bureau of Land Management for an easement across federal lands.

2008

  • Throughout the year – Both companies met with elected officials, community leaders and other interested parties to brief them on the project.
  • May 12 - Notice of Intent is issued by the Bureau of Land Management to notify the public that the public process for the project had begun.
  • June –  Bureau of Land Management held nine public scoping meetings.
  • December - Companies held nine landowner meetings.

2009

  • Throughout the year – Companies continued to meet with elected officials, community leaders and other interested parties to brief them on the status of the project.
  • January - Application filed with Bureau of Land Management to perform geotechnical studies along the routes.
  • March through November - Companies held public landowner meetings in various communities throughout Idaho and Wyoming.
  • July – More than 6,300 newsletters (PDF) sent to landowners and interested parties providing information about the project.

2010

  • July - Environmental Assessment for Geotechnical Drilling released by Bureau of Land Management with finding of no significant impact.
  • August –More than 11,400 newsletters (PDF) sent to landowners and interested parties providing an update on the project.
  • September - Bureau of Land Management approved right of way grant to allow for geotechnical studies to be conducted on BLM-managed land.

2011

  • Throughout the year – Companies continued to meet with elected officials, community leaders and other interested parties to brief them on the status of the project.
  • January – More than 11,200 newsletters (PDF) sent to landowners and interested parties providing an update on the project.
  • July 29 - Bureau of Land Management published in Federal Register a Notice of Availability announcing draft Environmental Impact Statement release, followed by a 90-day public comment period.
  • September/October 2011 - Bureau of Land Management hosted 17 public open houses on the draft Environmental Impact Statement throughout the project area.
  • October 28 – Draft Environmental Impact Statement public comment period closed.

2012

  • Throughout the year – Companies continued to meet with elected officials, community leaders and other interested parties to brief them on the status of the project.
  • August - The Bureau of Land Management identified agency preferred alternatives.
  • September – More than 12,600 newsletters (PDF) sent to landowners and interested parties providing an update on the project.

2013

  • April - The Bureau of Land Management issued a final Environmental Impact Statement and opened the 60-day comment period.
  • May - The Bureau of Land Management hosted a series of public open houses throughout the project area.
  • November – The Bureau of Land Management issued its Record of Decision for segments 1 through 7 (Windstar to Populus, Populus to Midpoint and Populus to Cedar Hill) and segment 10 (Midpoint to Cedar Hill). The Bureau of Land Management deferred their decision for segment 8 (Midpoint to Hemingway) and segment 9 (Cedar Hill to Hemingway). A separate Record of Decision will be released providing right of way grants for the remaining segments following additional environmental analysis. 

2014

  • August – The Bureau of Land Management published the Supplemental Environment Impact Statement Notice of Intent and began the 30-day Public Scoping process.
  • October – The Bureau of Land Management conducted scoping meetings.


Next Steps

  • The companies continue to meet with elected officials, community leaders and stakeholders to resolve the remaining issues.
  • Both companies will work with the Bureau of Land Management to continue through the Supplemental Environmental Impact Statement process for segment 8 (Midpoint to Hemingway) and segment 9 (Cedar Hill to Hemingway), in support of a separate Record of Decision and right-of way grant for the remaining segments which is scheduled for October, 2016
  • The companies will evaluate next steps for segments 1 through 7 (Windstar to Populus, Populus to Midpoint and Populus to Cedar Hill) and segment 10 (Midpoint to Cedar Hill). The companies will consider impacts of the BLM’s deferred Record of Decision on segment 8 and segment 9 as well as updated customer and system needs.

 

(Updated March 4, 2015)