Corsac Generating Station

Executive Overview

Corsac Generating Station is a 109 MW (nameplate) / 115 MW (maximum deliverable) enhanced geothermal system (EGS) project under development in Churchill County, Nevada, by Fervo Energy. The project has a 15-year power purchase agreement with NV Energy, structured under Nevada's Clean Transition Tariff (CTT), which was approved by the Nevada Public Utilities Commission in May 2025. Under the CTT, Google funds the additional cost of clean firm power above standard utility procurement rates, with the arrangement structured so that no costs are passed to NV Energy's other ratepayers. Commercial operation is expected on January 30, 2030, with construction commencing in 2026. The project is expected to deliver approximately 872,140 MWh of renewable energy annually.

How It Works & Differentiation

Fervo Energy's approach adapts horizontal drilling and hydraulic fracturing techniques from the oil and gas industry to create artificial geothermal reservoirs in dry, hot rock formations previously inaccessible to conventional geothermal development. Wells are drilled to approximately 7,700 feet, with horizontal conduits extending 3,250 feet on either side, accessing rock temperatures of up to 376°F. Fibre-optic sensing tools monitor reservoir performance in real time, enabling flow optimisation that conventional geothermal cannot achieve. Unlike intermittent renewables, EGS delivers firm, 24/7 carbon-free baseload power, and Fervo has adopted a DOE seismicity protocol to manage induced seismic risk. Fervo's internal benchmarks show geothermal plant construction can be completed in approximately four months, compared to years for nuclear or conventional thermal.

Commercialization & Traction

The Clean Transition Tariff framework — the first of its kind in the United States — enables Google to directly fund new geothermal capacity via NV Energy, providing Fervo with a bankable 15-year revenue stream. Following CTT approval, Fervo reports that dozens of hyperscalers and AI companies have expressed interest in similar arrangements, with at least five in advanced commercial discussions as of mid-2025. The company is considering doubling or tripling the Corsac project's size, and controls a pipeline of over 16 GW of geothermal leases. Duke Energy has also announced interest in developing a CTT structure in the southeastern United States, suggesting the commercial model may replicate across other utility jurisdictions.

Scalability & Strategic Context

The Corsac project is designed as a single-phase development but sits within a site characterised as a potential gigawatt-plus resource, with Fervo's pipeline suggesting significant upside beyond the initial 109 MW. A March 2025 study cited in industry reporting found geothermal could economically meet up to 64% of expected data centre demand growth by the early 2030s, providing context for the commercial interest Fervo is seeing from technology companies. The CTT regulatory structure, if replicated in other states, could provide the commercial framework needed to unlock large-scale EGS deployment without requiring ratepayer cross-subsidy — the key barrier that has historically limited geothermal's commercial scale.