In the late 1850’s, Andrew Kennedy discovered gold in an outcropping of quartz. The mine produced over $34.2 million in gold, making it one of the richest gold mines in the world. With a depth of 5,912 feet, it was the deepest mine in North America when it was closed by the War Production Board in 1942. The mine office building was constructed in 1908 and contained an assay room with bullion furnace, administrative offices and guest rooms on the third floor.