Utilities Seek Approval for 2,000 MW Transmission Line in Idaho
Rocky Mountain Power and Idaho Power have submitted applications for certificates to build a transmission line segment, enhancing energy capacity by 2,000 megawatts. The project is crucial for improving energy delivery to the Treasure Valley and surrounding regions.
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Rocky Mountain Power and Idaho Power have filed applications with the Idaho Public Utilities Commission for certificates of public convenience and necessity to construct Segment E-8 of the Gateway West project. This 500-kilovolt transmission line will connect the Midpoint Substation in Jerome to the Hemingway Substation near Melba, Idaho, and is designed to increase transmission capacity and enhance energy delivery from Mountain Home and Twin Falls.
Construction is set to start in October 2027, divided into three phases, with the final phase expected to commence in 2030. Idaho Power will own 99 percent of the segment, while PacifiCorp will hold the remaining 1 percent. The project may significantly impact regional energy availability and infrastructure development.
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