Building on the environmental challenges outlined in prior coverage of US Magnesium's September bankruptcy, the closure of its Rowley smelting plant in Utah—the nation's largest primary magnesium producer—now imperils the domestic supply chain for this critical mineral used in defense, aluminum, and renewable energy applications. Industry leaders warn of heightened import dependence from China, despite federal investments in alternatives.
US Magnesium's Rowley plant on Utah's Great Salt Lake operated for over 50 years before halting primary production in late 2021 due to equipment failures. The company filed for Chapter 11 bankruptcy on September 10, with president Ron Thayer declaring in court that no other significant U.S. producer exists for primary magnesium, vital for defense contractors. Resuming operations would demand a $40 million investment.
While environmental advocates view the shutdown positively amid the site's pollution legacy, supply disruptions pose greater long-term risks. U.S. primary magnesium capacity stands at 64,000 metric tons annually per the U.S. Geological Survey, versus China's 1.8 million tons. The 2021 halt triggered 2022 price surges and an Indiana aluminum can factory closure, though markets stabilized by 2023 via imports and recycling. John Haack of MagPro LLC, a recycler and primary producer, noted adaptation but readiness to expand.
Thayer argued imports erode supply chain security. Nevada state geologist Simon Jowitt cautioned, “If we remove any [magnesium production] capacity we have here, that means that we’re wholly dependent, essentially, on imports.” The Department of Defense granted $19.6 million in 2023 to Magrathea Metals for seawater-based production, with founder Alex Grant targeting replacement output by decade's end and scouting Utah sites. Grant attributed US Magnesium's issues to avoidable profit-driven choices, noting America's lost expertise in large projects.
Antidumping duties on Chinese magnesium persist since 1995 (not extended to Israel in 2019). US Magnesium previously bankrupt in 2001, citing foreign competition.
