The Guadalupe Mine is a large underground silver mine with an operating shaft and is located adjacent to the Guadalupe processing plant, two factors that minimize mining and trucking costs. Historical production from the Guadalupe Mine was first recorded in 1529 and it produced an estimated 9,000,000 ounces of silver between 1967 and 1982 from five veins. This mine restarted commercial production in September 2018 after a hiatus of five years and is now the largest producing mine on the property. Production is sourced from a swarm of veins on multiple levels. With a low cost structure and good grades, it is expected that Guadalupe will be a cornerstone of production in the district for a long time to come.