Explores for high-grade stibnite at Ester Dome, assesses underground mining potential at newly acquired Nolan Creek, remains reliant on imported feedstock in Montana.
United States Antimony Corp. Aug. 5 announced that it is exploring and evaluating the development potential of its antimony-gold project in Alaska.
USAC reports that it has accumulated a portfolio of five antimony-gold projects in Alaska over the past two years. This portfolio includes:
• Ester Dome – An exploration-stage project that has also been referred to as Mohawk that covers 9,000 acres of antimony-prospective ground across four blocks of claims near Fairbanks.
• Stibnite Creek – A 3,800-acre package of state mining claims covering historical antimony targets south of the Alaska Highway about 160 miles southeast of Fairbanks.
• Maclaren River – Four claims staked by USAC in 2024 covering prospective ground on the south flank of the Alaska Range, approximately 200 miles south of Fairbanks.
• True North – A package of 23 state mining claims about 20 miles north of Fairbanks that were staked by USAC earlier this year.
• Dome Creek Placer – 145 acres of patented mining claims located near the True North project.
• Nolan Creek – A land package about 180 miles north of Fairbanks covering known gold-antimony mineralization that USAC reports it acquired through a public auction by the Alaska Mental Health Trust Land Office.
USAC reports that its 2026 activities in Alaska are focused primarily on Ester Dome and Nolan Creek.
The company says it is currently conducting air-track drilling and trenching to search for high-grade stibnite, an antimony mineral, associated with soil anomalies near historically productive quartz-gold vein systems, as well as gravity anomalies identified during exploration by the company in 2025.
So far, the company reports that it has tested only three out of 15 targets identified at Ester Dome and plans to drill 50 holes there this summer.
Nolan Creek covers hardrock and placer gold mineralization explored by Silverado Gold Mines Ltd. about two decades ago. According to a resource calculated in 2008, the project hosts 42,412 tons of historical reserves averaging 28% (23.76 million lb) antimony, and 0.41 ounces per ton (17,300 oz) gold. At $13/lb antimony and $4,000/oz gold, the metals in this resource would be valued at $378 million.
A historical adit that USAC reports to be large enough to provide access for modern mining equipment has been developed to antimony-gold vein structures at Nolan Creek.
The company says it recently hosted underground site inspections by two mining contractors in preparation for their bids for contract underground development and mining at Nolan Creek.
The company plans to truck high-grade ore extracted at the northern Alaska operation to Montana, where it would be processed through the Radersburg mill acquired by USAC earlier this year and the company’s Thompson Falls antimony smelter, also in Montana.
USAC also provided an update on exploration and mining at its Stibnite Hill project adjacent to the Thompson Falls smelter.
Last October, USAC reported that the Montana Department of Environmental Quality (DEQ) approved permits for limited mining at Stibnite Hill. After review over the winter, however, DEQ requested that the company implement additional safeguards to control possible contamination of surrounding soils.
As a result, the company remains 100% reliant on foreign-sourced feedstock for processing through its antimony smelter.
USAC, however, reports that the required safeguards at Stibnite Hill have been implemented and approved, and it is delivering ore to the Radersburg mill.
“Because of their physical location, weather has always been a factor,” said USAC Chief Mining Engineer Joseph Bardswich. “However, progress has been made on all three regions where we are now or soon will be, moving critical mineral material to either our own processing centers or contracted third parties.”
The company says it is also inviting qualified bidders for pre-development work at its Fostung tungsten project in Ontario, Canada.