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Idaho Power Proposes Peregrine Energy Center in Elmore County to Meet Surging Demand

Chronicle Editorial Staff
June 6, 2026

Idaho Power is evaluating a 160-acre site along Simco Road in Elmore County for a new natural gas power plant — a direct response to nearly 1,000 MW of projected peak demand growth over the next five years, much of it driven by hyperscale data center development.

<p>Idaho Power is evaluating a 160-acre site along Simco Road in Elmore County as a potential home for the <strong>Peregrine Energy Center</strong> — a proposed natural gas generation facility the utility says is needed to keep pace with unprecedented regional energy demand growth.</p> <h2>Why Now?</h2> <p>Over the next five years, Idaho Power projects its peak demand will increase by nearly <strong>1,000 MW</strong> — roughly 50% more than the capacity of its largest existing power plant. Over a 20-year horizon, demand across the service area is expected to grow by nearly 45%, with more than half of that growth arriving in the next five years alone.</p> <p>That surge is being driven by a mix of new residential construction, small businesses, and major industrial customers — a category that increasingly includes hyperscale AI data centers proposed across the Treasure Valley and Magic Valley regions.</p> <h2>What's Proposed</h2> <p>The Peregrine Energy Center site is located near existing and planned high-voltage transmission infrastructure in Elmore County, which Idaho Power says positions it to move power efficiently to customers across its service territory. The initial concept calls for a new natural gas power plant, with the site designed to accommodate future expansion and potentially other energy resource types.</p> <p>Idaho Power frames the project as part of an <em>"all of the above"</em> generation strategy that includes wind, solar, energy storage, and transmission investment — with natural gas serving as a dispatchable backbone resource available around the clock regardless of weather conditions.</p> <h2>Regulatory and Community Process</h2> <p>Before the Peregrine Energy Center can move forward, it must clear multiple regulatory hurdles, including approvals from the Idaho Public Utilities Commission, the Oregon Public Utility Commission, and local permitting from Elmore County — including a Conditional Use Permit that gives the public a formal opportunity to weigh in.</p> <p>Those review processes are expected to unfold over the coming months and years. Idaho Power has stated it looks forward to engaging with customers, regulators, and affected communities throughout the process.</p> <h2>Community Concerns</h2> <p>The proposal arrives amid growing scrutiny of data center development across Idaho. Community groups, water rights advocates, and agricultural interests have raised alarms about the cumulative impact of large-scale industrial energy consumers on Idaho Power's grid, groundwater supplies from the Eastern Snake River Plain Aquifer, and the long-term character of rural Idaho communities.</p> <p>Critics argue that building new fossil fuel generation capacity to serve the demands of AI hyperscalers runs counter to Idaho's clean energy goals and shifts infrastructure costs onto existing ratepayers.</p> <h2>What Comes Next</h2> <p>Idaho Power has not yet announced a construction timeline or confirmed final capacity figures for Peregrine. The Elmore County permitting process is expected to be among the first public milestones. Residents and stakeholders are encouraged to participate in county hearings and public comment periods as the project advances.</p> <p><em>Source: <a href="https://www.idahopower.com/energy-environment/energy/energy-sources/natural-gas/peregrine-energy-center/" target="_blank" rel="noopener noreferrer">Idaho Power — Peregrine Energy Center</a></em></p>