Yankee Boy Basin, Revenue-Virginius Mine This mine is prepping the site in order to reopen operations.Operation officially got underway on Oct. 19, 2011. In its heyday, the mine was a profitable venture, producing more than 14.5 million ounces of silver between 1876 and the late 1940s. It weathered the Silver Panic of 1893 while many other silver mines in the region and across the west failed.