Rio Tinto has entered into a new long-term renewable energy agreement intended to accelerate decarbonization across its U.S. mining footprint. The company confirmed a 15-year virtual power purchase agreement with renewable developer TerraGen, securing clean electricity from a newly commissioned wind project in Texas. The energy will be directed to support Rio Tinto’s Kennecott copper operations in Utah, one of the largest and most technologically advanced copper producers in the world. The partnership represents another step in the miner’s broader push to lower emissions, as global metals demand continues to rise.

Strengthening the Energy Transition Plan for One of the World’s Leading Copper Mines

Kennecott has been central to Rio Tinto’s efforts to modernize and decarbonize its global portfolio. The company has committed to reducing Scope 1 and Scope 2 emissions by half by 2030 and reaching net zero by mid-century. Clean energy is a key pillar of this strategy. Rio Tinto already sources close to eighty percent of its global electricity from renewable sources, and it aims to increase this to about ninety percent by the end of the decade. The new agreement complements a series of recent actions at Kennecott, including converting its heavy mining fleet entirely to renewable diesel and completing a 5 megawatt solar installation in 2023. A second, much larger 25 megawatt solar project is expected to come online soon. Taken together, these projects aim to shrink the mine’s operational footprint while ensuring energy security for a site that plays a vital role in the production of metals needed for electrification.

Details of the TerraGen Partnership and the Monte Cristo Wind Project

Under the terms of the agreement, Rio Tinto will purchase 78.5 megawatts of wind energy from TerraGen’s Monte Cristo I project in Hidalgo County, Texas. The full wind farm has a capacity of 238.5 megawatts and is expected to produce more than 850 gigawatt hours of renewable electricity each year. TerraGen noted that this output is comparable to the annual electricity use of more than eighty thousand households. The arrangement is structured as a virtual power purchase agreement, allowing Rio Tinto to financially support new clean energy on the U.S. grid while matching that generation with its own operational demand. TerraGen recently completed commissioning of the Monte Cristo facility, marking one of the company’s most significant wind deployments to date.

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Leadership Perspectives on Expanding Renewable Capacity

Nate Foster, Managing Director of Rio Tinto Kennecott, emphasized that investing in new renewable generation is essential both for meeting the company’s climate commitments and for contributing to broader grid decarbonization. Foster highlighted that renewable energy is now integral to operational planning at Kennecott, which continues to explore opportunities to combine on-site solar, low-carbon fuels and market-based renewable power. TerraGen’s Chief Financial Officer, John O’Connor, described the Monte Cristo project as part of a long-term effort to expand access to clean energy in Texas and across the United States. He noted that the company sees rising demand from industrial clients seeking to meet sustainability goals while also improving the resilience of their energy supply.

A Broader View of How Mining Companies Are Adapting to Clean Energy Pressures

As demand for copper, aluminum and other transition metals accelerates, the mining industry faces mounting pressure to decarbonize extraction and processing. Rio Tinto has been among the most active in testing new pathways, from renewable power purchases to trialing low-carbon smelting technologies. The focus on Kennecott is significant because copper is essential to electric vehicles, grid expansion and renewable energy manufacturing, making its climate footprint particularly relevant for global supply chains. The new agreement with TerraGen suggests that large mining companies increasingly view long-term renewable energy contracts as central to maintaining competitiveness and regulatory alignment. It also reflects a broader U.S. shift, as heavy industry looks to respond to investor expectations for lower emissions and diversify energy sources in regions where grid reliability and renewable penetration vary sharply.

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Looking Ahead: Integrating Clean Energy into Mine Planning and Processing

Rio Tinto’s strategy indicates that renewable energy procurement will continue to expand, both through on-site generation and external partnerships. The company is also exploring solutions for process heat, electrification of mining equipment and other sources of Scope 1 emissions that cannot be resolved through clean electricity alone. If the company succeeds in raising its renewable share from seventy eight percent today to roughly ninety percent by 2030, Kennecott and other major assets could become benchmarks for how energy-intensive operations transition toward lower-carbon production. For regions such as Utah, which host legacy industrial sites, this shift could also accelerate broader investment in renewable infrastructure and supply chains.

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