Mazama Energy develops 331 °C Enhanced Geothermal System at Newberry, Oregon

Mazama Energy Develops Enhanced Geothermal System

Mazama Energy has announced the creation of the hottest Enhanced Geothermal System, with a bottomhole temperature of 331 °C, in Newberry, Oregon.

The company plans to proceed to a commercial project, targeting a 15-MW pilot in 2026 and further scaling to a 200-MW development.

Located within the Cascade Range, Newberry is one of the largest geothermal reservoirs in the U.S.

“With geothermal, you get global, round-the-clock energy that is carbon-free, cost-stable, and grid-independent,” said Sriram Vasantharajan, CEO of Mazama Energy.

Mazama Energy announced the start of a demonstration project at the Newberry site in late 2024 to test the feasibility of creating a superhot enhanced geothermal system.

Author's summary: Mazama Energy develops the world's hottest Enhanced Geothermal System.

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ThinkGeoEnergy ThinkGeoEnergy — 2025-10-29

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