American startup Mariana Minerals has entered into an agreement with Lisbon Valley Mining Co. LLC to acquire the assets of the Centennial copper mine in Utah. This is reported in a press release from Mariana Minerals.
Mariana Minerals, controlled by the venture capital firm Andreessen Horowitz, plans to reopen the abandoned Centennial copper mine in order to introduce new technology using unmanned equipment (dump trucks and drilling rigs) to increase production to 50,000 tons of copper cathode by 2030.
The Centennial mine is part of a 10,000-acre land complex with a processing plant with a capacity of 2.5 thousand tons of copper per year.
From the point of view of Mariana Minerals management, "over the past 50 years, there have been a small number of mining enterprises in the United States, since there are no specialists capable of designing and operating facilities."
The deal demonstrates the desire of mining companies to restore idle enterprises amid rising metal prices and establish production of critically important minerals in the United States. In particular, BHP Group and Faraday Copper Corp. They are considering restarting a copper mine in Arizona, and Blue Moon Metals Inc. in February acquired an inactive germanium and gallium mine in Utah from Teck Resources Ltd.
In June 2025, Mariana completed a funding round with the support of Andreessen Horowitz, Breakthrough Energy Ventures and Khosla Ventures.
Mariana Minerals is a startup that develops and operates mining projects for the energy sector, as well as the AI and defense development sectors. It is headquartered in San Francisco with manufacturing facilities in Houston.
Lisbon Valley Mining Company, LLC is a mining company producing copper, potassium, uranium and natural gas. The company sells pure copper cathodes, which are used in the production of renewable energy sources and electric cars. The headquarters is located in La Salle, Utah.
Andreessen Horowitz is an American private venture capital firm. The headquarters is located in Menlo Park (California, USA). The company ranks first in the list of venture capital companies in terms of assets under management worth $46 billion.
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