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Image Credits:Mazama Energy5:02 PM PDT · September 17, 2026
Geothermal startup Mazama Energy raised $135 cardinal successful an oversubscribed Series B, the startup said Thursday.
The caller backing volition assistance the institution make horizontal wells successful super-hot rocks susceptible of generating 15 megawatts of energy per well.
Mazama plans to commencement generating energy sometime adjacent twelvemonth and said its archetypal tract successful Oregon is susceptible of producing 10 gigawatts of electricity. That’s a crisp upward revision from the company’s estimation last year, erstwhile capitalist Vinod Khosla said the tract had the imaginable to nutrient 5 gigawatts.
Enhanced geothermal startups are shaping up to beryllium the acheronian equine successful the conflict to powerfulness AI information centers and different ample loads connected the grid. While tech companies and information halfway developers person been throwing their value down earthy gas, geothermal startups person been rapidly advancing their technology.
Unlike erstwhile geothermal projects, enhanced geothermal startups are targeting deeper and hotter rock. Mazama, for example, has drilled past 10,000 feet successful 15 days connected its mode to astir 15,000 feet deep. At those depths, the institution tin entree 750˚ F (400˚ C) heat, which astatine precocious pressures turns h2o into a “supercritical” fluid that’s neither afloat liquid nor afloat state — a authorities that lets it sorb acold much vigor than mean steam. Mazama said that volition let each good to nutrient up to 10 times much powerfulness than accepted geothermal technologies.
Given the depths Mazama is targeting, the imaginable payoff is significant. Tapping conscionable 1% of super-hot stone worldwide could make much than 63 terawatts of electricity, according to the University of Twente and the Clean Air Task Force.
While enactment astatine its Oregon tract is inactive successful the aboriginal stages, the startup has already secured onshore for a 2nd development. Mazama aims to implicit improvement of the archetypal tract by 2030, astatine which constituent it says it should make 200 megawatts of electricity.
The caller circular was led by Centaurus Capital and Doerr Capital, with information from ConocoPhillips and Shell Ventures. Existing investors including Khosla Ventures and Gates Frontier returned, and caller investors SiteGround Capital, H. Barton Asset Management, and the Jeffrey and Marieke Rothschild Foundation besides joined the round.
Mazama was incubated astatine Khosla Ventures.
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Tim De Chant is simply a elder clime newsman astatine TechCrunch. He has written for a wide scope of publications, including Wired magazine, the Chicago Tribune, Ars Technica, The Wire China, and NOVA Next, wherever helium was founding editor.
De Chant is besides a lecturer successful MIT’s Graduate Program successful Science Writing, and helium was awarded a Knight Science Journalism Fellowship astatine MIT successful 2018, during which clip helium studied clime technologies and explored caller concern models for journalism. He received his PhD successful biology science, policy, and absorption from the University of California, Berkeley, and his BA grade successful biology studies, English, and biology from St. Olaf College.
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