Mazama Energy, backed by investors including Vinod Khosla, has secured $135 million to advance its enhanced geothermal technology targeting superhot rock deep below Oregon, promising up to 10 times more power per well than traditional geothermal systems.
- Raised $135M in oversubscribed Series B funding
- Targeting 15,000-foot deep wells to access 750°F superhot rock
- Plans 10x power output per well over traditional geothermal
What happened
Mazama Energy raised $135 million in a Series B funding round led by Centaurus Capital and Doerr Capital, with participation from major energy investors like ConocoPhillips and Shell Ventures. This oversubscribed round included returning backers such as Khosla Ventures and Gates Frontier, plus new investors like SiteGround Capital.
The capital will support the startup’s development of enhanced geothermal systems by drilling deep horizontal wells reaching about 15,000 feet below the surface, accessing heat at around 750 degrees Fahrenheit. These wells are designed to tap supercritical fluids capable of producing up to 15 megawatts each, significantly increasing power generation potential compared to conventional geothermal technology.
Why it matters
Enhanced geothermal resources at such extreme depths could unlock vast clean energy potential, with Mazama’s Oregon site alone estimated to produce up to 10 gigawatts of electricity—double previous projections. The technology’s ability to deliver consistent, baseload power around the clock makes it especially valuable for powering large energy loads, including AI data centers.
By using supercritical fluids instead of ordinary steam, Mazama’s approach enables wells to generate nearly ten times more power per well. Experts estimate that tapping just 1% of the world’s superhot rock could provide more than 63 terawatts of clean electricity, showcasing the enormous potential impact on global energy systems.
What to watch next
Mazama plans to begin generating electricity as early as next year from its initial Oregon site, progressing toward a development target to produce 200 megawatts by 2030. The company is also expanding with a second secured site, indicating an ambition to scale their enhanced geothermal model beyond pilot stages.
Future milestones to monitor include the successful drilling and operational performance of the superhot rock wells, the timeline for commercial electricity production, and broader adoption or partnerships within clean tech and energy sectors eager for reliable, carbon-free power solutions.