United States Antimony Corporation said mining remains underway at its Stibnite Hill property near Thompson Falls, Montana. In an update dated August 25, 2026, the company reported that 42 truckloads of stibnite ore had been moved from the site during 2026 to date.
#2026 Stibnite Hill mining activity
USAC said each truckload carried approximately 14 tons of ore with approximately 10% antimony content. The company described the shipments as approximately 576 tons of high-grade stibnite ore transported during the current 2026 mining campaign.
Mining and haulage were reported to be proceeding at approximately three truckloads per operating day, or approximately 42 tons of ore per day. USAC compared the current pace with its 2025 campaign, during which approximately 800 tons of antimony ore were transported over a 45-day period. The company said the present rate is over two times faster than last year's daily rate.
Operations resumed in April 2026 after winter weather brought the previous campaign to an end in November 2025.
#Processing route for the ore
Ore from Stibnite Hill is sent to USAC's flotation mill in Radersburg, Montana. The antimony concentrate produced there is then shipped either to the company's Thompson Falls smelter or to the Madero smelter in Mexico, where it is converted into finished antimony products, including mill spec material.
#Company strategy and Alaska outlook
USAC said the work at Stibnite Hill forms part of a previously announced strategy to increase access to domestically sourced antimony feedstock and begin reducing reliance on third-party and foreign ore purchases. The source does not quantify any resulting change in costs, production or financial performance.
Joseph Bardswich, P.E., USAC's Executive Vice President and Chief Mining Engineer, said contractors were becoming more efficient and that mining could continue within the vein systems being excavated. Bardswich also said the company anticipated accomplishing similar results soon in Alaska. This forward-looking comment is subject to the risks and uncertainties identified by USAC.
#Company and listing information
United States Antimony Corporation, also known as USAC or US Antimony, is identified in the announcement as a producer and processor of antimony, zeolite and other critical minerals. Its listed symbols are NYSE:UAMY and NYSE Texas:UAMY.
The company said it and its subsidiaries in the U.S., Mexico and Canada sell antimony, zeolite and precious metals primarily in the U.S., Mexico and Canada. Its stated activities include mining, purchasing and processing ore into antimony oxide, antimony metal, antimony trisulfide and precious metals at facilities in Montana and Mexico.
#Risks identified by USAC
USAC cautioned that forward-looking statements may be affected by fluctuations in antimony and zeolite prices and demand, domestic and global economic conditions, mining and mineral-processing risks, geological or metallurgical conditions, and the availability and cost of energy, equipment, transportation and labour.
The company also identified risks involving permits, licences and regulatory approvals; changes to environmental and mining laws or regulations; competitive factors; geopolitical developments; and the effects of weather, natural disasters or health pandemics on operations and supply chains. USAC said actual results could differ materially from its forward-looking statements and cautioned readers not to place undue reliance on them.
#Key Takeaways
- USAC reported ongoing mining at Stibnite Hill near Thompson Falls, Montana, after operations resumed in April 2026.
- The company said 42 truckloads of stibnite ore had been transported during 2026 to date, averaging approximately 14 tons per truck and approximately 10% antimony content.
- Mining and haulage were progressing at approximately three truckloads per operating day, or approximately 42 tons of ore per day.
- Material is sent to the Radersburg flotation mill before concentrate is shipped to smelters in Montana or Mexico.
- USAC said the programme is intended to expand access to domestic antimony feedstock and begin reducing reliance on third-party and foreign ore purchases.
#What has United States Antimony Corporation announced at Stibnite Hill?
United States Antimony Corporation, also identified as USAC, US Antimony and the Company, announced that operations were continuing at its Stibnite Hill mine near Thompson Falls, Montana. The August 25, 2026 announcement described mining as ongoing rather than completed.
#How much ore has been transported during the 2026 mining campaign?
The company stated that 42 truckloads of stibnite ore had been transported from the mine during 2026 to date. Each truckload averaged approximately 14 tons and approximately 10% antimony content. USAC said this represented approximately 576 tons of high-grade stibnite ore transported during the current 2026 mining campaign.
#What is the current mining and haulage rate at Stibnite Hill?
USAC said mining and haulage were progressing at approximately three truckloads per operating day, or approximately 42 tons of ore per day. The company compared this with its 2025 mining campaign, when approximately 800 tons of antimony ore were transported over a 45-day period.
#How is ore from Stibnite Hill processed?
Material mined at Stibnite Hill is transported to the company's Radersburg, Montana flotation mill. The resulting antimony concentrate is then shipped either to USAC's Thompson Falls smelter or to the Madero smelter in Mexico for conversion into finished antimony products, including mill spec material.
#What is the stated strategic purpose of the mining programme?
USAC said progress at Stibnite Hill was part of its previously announced strategy to expand access to domestically sourced antimony feedstock and begin reducing reliance on third-party and foreign ore purchases. The source does not quantify the effect of this strategy on costs, production or financial performance.
#What forward-looking comment was made about operations in Alaska?
Joseph Bardswich, P.E., Executive Vice President and Chief Mining Engineer, stated that USAC anticipated accomplishing similar results soon in Alaska. The statement is forward-looking and subject to the risks and uncertainties identified by the company. The source does not provide a production figure or timing beyond the word “soon”.
#What risks and uncertainties does the company identify?
USAC identified fluctuations in the market prices and demand for antimony and zeolite; changes in domestic and global economic conditions; operational risks inherent in mining and mineral processing; geological or metallurgical conditions; the availability and cost of energy, equipment, transportation and labour; and the company's ability to maintain or obtain permits, licences and regulatory approvals.
The company also cited changes in environmental and mining laws or regulations, competitive factors, geopolitical developments, and the effects of weather, natural disasters or health pandemics on operations and supply chains. USAC cautioned that actual results could differ materially from forward-looking statements and said readers should not place undue reliance on them.
#Where is United States Antimony Corporation listed?
The source identifies United States Antimony Corporation under NYSE:UAMY and NYSE Texas:UAMY.
Original source: Read original article