Completed in 1973 by the Magma Copper Company, the Never Sweat Tunnel stretches 8,600 feet (1.6 miles) long and sits at a depth of 1,100 feet. At the time, it came with a hefty price tag of $74 million, but what it delivered was priceless. It created a direct underground connection between the East and West Plant sites.
Every October 30, Mine Rescue Day reminds us of the quiet heroes who train for the worst so they can help others stay safe in emergency situations. These volunteers don’t seek the spotlight. They prepare, practice, and show up when it matters most.
From September 8–24, Resolution Copper completed a major infrastructure upgrade at the historic Magma Mine’s 8 Shaft, replacing a 20-year-old 480V variable frequency drive (VFD) with a new 5KV unit.
Rio Tinto, the majority owner of Resolution Copper, has donated $1 million to support flood relief efforts in the City of Globe and Town of Miami, following devastating flash floods in late September and additional flooding that occurred this past weekend, causing widespread damage to local communities and businesses.
In August, our underground team had anything but a typical day. While working in the 10 Hoist House, they spotted something unexpected, a baby coatimundi, curled up and clearly in distress. She was tiny, dehydrated, and very lost.
As Resolution Copper continues to invest in developing one of the most significant copper projects in the United States, Sturgeon Electric, based in Miami, Arizona, has emerged as a trusted partner—delivering complex electrical projects with precision, reliability, and an unwavering commitment to safety.
Her journey began with a fascination for geology. Over time, that interest grew into a passion for sustainable practices and community engagement. Today, Darla is helping lead the charge in setting new environmental standards for the mining industry.
Mining has long been a cornerstone of Arizona’s history and at Resolution Copper, we’re proud to carry that legacy forward with Arizona talent, Arizona businesses, and Arizona heart.
“This is merely a temporary pause so that the court of appeals can consider plaintiffs’ eleventh hour motions, which were submitted on Saturday afternoon asking for a ruling by Monday. We are confident the court will ultimately affirm the district court’s well-reasoned orders explaining in detail why the congressionally directed land exchange satisfies all applicable legal requirements.
Resolution Copper has been awarded the 2025 Safety Award for Small Underground Mine by the Rocky Mountain Mining Institute (RMMI), recognizing the operation’s outstanding and ongoing safety performance during the 2024 calendar year. This marks the fourth consecutive year that Resolution Copper has received this distinguished award.