Fervo Targets October Start for Potential First U.S. Commercial Enhanced-Geothermal Plant

Fervo Energy is targeting October grid delivery from Cape Station near Milford, Utah. If it reaches that target, the project would become the first enhanced-geothermal system in the United States to reach commercial operation—a key test of whether engineered underground heat can become a reliable new power source at scale.

Building a reservoir in hot rock

Traditional geothermal projects depend on naturally occurring underground reservoirs. Fervo’s enhanced-geothermal approach creates its own: it drills paired injection and production wells more than two miles deep, including horizontal sections that can extend more than a mile, then fractures the surrounding rock to make a route for water to circulate.

• Water moves down an injection well, heats underground at temperatures above 400 degrees Fahrenheit, and returns through a separate production well.
• A heat exchanger turns that heat into electricity; cooled geothermal brine is reinjected underground in a closed-loop system.
• The method adapts oil-and-gas drilling and hydraulic-fracturing techniques for harder rock, hotter temperatures and longer-lived wells.

A small plant before a much larger commitment

The October milestone concerns a 33 MW first plant, not the larger Cape Station supply agreement Fervo signed with Google. Fervo’s Phase II plants are designed for 50 MW and, through standardized parts and designs, are expected to take more than 30% less time to build.

Google agreed to buy 396 MW from Cape Station in a deal Fervo expects to begin supplying in 2028. The carbon-free power is intended as a building block for a potential Utah data center. Google also has an option to add about 600 MW by June 2030, potentially bringing its offtake to nearly 1 GW; final data-center plans remain subject to engineering feasibility, approvals and commercial conditions.

Commercial operation is not yet cost competitiveness

Fervo reported drilling costs of about $7,000 per kilowatt for Cape Station Phase I. It targets $5,500 per kilowatt for Phase II and $3,000 per kilowatt over the longer term. Geothermal remains more expensive than other power sources even with federal tax credits, making those reductions central to the company’s scale-up case.

Fervo says it will use repeatable well development, standardized plants and established oil-and-gas supply chains to expand. It raised nearly $2 billion in its May 2026 initial public offering for that effort. Reaching commercial operation in October would mark a meaningful start, but Phase II must still demonstrate the planned reductions in cost and construction time.