Idaho Power Applies for Natural Gas Power Plant Certificates

PressReleases

Published April 7th, 2026

Detected April 8th, 2026

Summary

Idaho Power submitted an application to the Idaho Public Utilities Commission seeking certificates of public convenience and necessity for two natural gas-fueled power plants in Idaho. The South Hills Power Plant in Twin Falls County would provide 222 megawatts with commercial operation targeted for June 1, 2029, while the Peregrine Power Plant in Elmore County would provide 430 megawatts with commercial operation targeted for June 1, 2030. The utility states the plants are needed to offset growing capacity deficits and represent the least-cost, least-risk options.

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What changed

Idaho Power has filed applications with the Idaho Public Utilities Commission for certificates of public convenience and necessity to construct two natural gas power plants totaling 652 megawatts of generating capacity. The applications detail the South Hills and Peregrine facilities as necessary to address projected capacity deficits, with the utility characterizing these as the least-cost, least-risk options available.

Idaho PUC will review the applications to determine whether to grant the certificates, which are required before construction can proceed. Stakeholders including consumers, local governments, and environmental groups may have opportunities to participate in the regulatory review process.

What to do next

Monitor Idaho PUC case IPC-E-26-04 for updates at puc.idaho.gov/case/Details/7719
Review proposed facilities for potential community or environmental impact concerns
Submit public comments if desired during the regulatory review process

Source document (simplified)

Case No. IPC-E-26-04 Order No. 36994 Contact: Adam Rush Office: 1-208-334-0339 E-mail Address: adam.rush@puc.idaho.gov NEWS RELEASE: Electric utility submits application seeking certificates of public convenience and necessity for power plant projects.

BOISE (April 7, 2026) - Idaho Power has submitted an application to the Idaho Public Utilities

Commission seeking certificates of public convenience and necessity for two natural gas-fueled power plants that will help the utility offset a growing demand for energy. The utility is proposing to build the South Hills Power Plant in Twin Falls County and the Peregrine Power Plant in Elmore County. The South Hills plant is designed to provide 222 megawatts of electricity. Idaho Power plans to begin commercial operation of the plant on June 1, 2029. The Peregrine plant is planned to be built in Elmore County and is designed to provide 430 megawatts of electricity. Commercial operation of the plant is planned to begin on June 1,

2030.

The utility said the natural gas-fueled plants are needed to offset capacity deficits that begin in

Idaho Power also said it determined that the power plants are the least-cost, least-risk options that are capable of addressing the capacity deficits. If granted by the Commission, the certificates of public convenience and necessity will allow Idaho Power to move forward with the construction of the power plants. Additional information on Idaho Power's application is available at: puc.idaho.gov/case/Details/7719.