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        Supplemental Environmental Impact Statement | Segments 8 and 9


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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.


graphic depicting route alignments being analyzed in detail in the SEIS



500-kV transmission tower against blue sky



The BLM has released initial information on 
route alignments being analyzed in detail in 
the draft supplemental EIS. 

The draft supplemental EIS will present 
various pairings of the routes shown in the 
graphic to the left as a range of reasonable 
options for siting segments 8 and 9 and 
will analyze the potential impacts of each.

Click on the image for more information about 
the routes depicted.



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

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

  SCHEDULE at a glance
¦ Notice of Intent  09.19.2014
¦ Scoping  closed 10.24.2014
Draft Supplemental EIS  spring 2016
  Public comment (+90 days)
  Final Supplemental EIS
  Protest period (+30 days)
  Record of Decision

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