Gateway West Segment E8 – Midpoint to Hemingway
Gateway West Segment E8 is a joint project with Idaho Power Company and is part of the Energy Gateway Program. This project is a key component to advance the goals of building resiliency, reliability and clean energy access in the Western energy grid. As part of the larger Energy Gateway Program, this project will consist of building a new 128-mile 500 kV transmission line between the existing Midpoint Substation in Jerome, Idaho, and the existing Hemingway Substation in Melba, Idaho. Expansions will be needed at both substations. Three signal regeneration stations will also be constructed along the line.
Gateway West Segment E8 will increase capacity between Midpoint West and Boise East by approximately 2,000 megawatts and relieve constraints on the transmission system between the Magic Valley and the Treasure Valley.
Midpoint to Hemingway Map (subject to change)
Project timeline
- Design & Engineering: June 2024 – June 2026
- Project Surveying: June 2024 – December 2024
- Right of Entry & Right of Way: May 2024 – September 2026
- Local/State Permitting: January 2025 – May 2025
- Construction: October 2026 – October 2028
- Completed/In-Service: October 2028
More information
Requests for additional information on the Midpoint to Hemingway Gateway Segment E8 project may be directed to:
- For public officials: Tami Moody, Tami.Moody@PacifiCorp.com
- For members of the public/property owners: Shawn Graff, Shawn.Graff@PacifiCorp.com
Please include your request, along with your contact information and preferred contact method.