Photo: "Mine at 1,000 Feet"

Within the first 3 years of operation, 11,000 tons of ore, comprised of 15% lead, was mined here in Death Valley and hauled by tractor-drawn trucks for 45 miles, before being  transported by rail. After dumping the ore, the trucks brought water back to the mine. 

The mine remained in operation for another 46 years, but only yielded another 5,000 tons during that time.