May 4, 2020. Thompson Falls, Montana. United States Antimony Corporation (“USAC”, NYSE American “UAMY) reported progress on the gold and silver leach plant in Guanajuato, Mexico for the Los Juarez property. To date 16 test leaches have been completed in the startup process. To get the mill to its current capacity of 100 metric tons per day, a thickener is being constructed on site to control the pulp density, and one additional leach tank will be built on site.