Bunker Hill, a major player
in US zinc history
The Coeur dāAleneās most famous mine, Bunker Hill was first discovered in 1885 by Noah Kelloggāthe regionās first major deposit discovery. Eventually, Bunker Hill would come to include several deposits with a mill, smelter and lead-zinc refineries combined into one large complex.āBunker Hill was instrumental in developing uses for zinc and contributed much to the zinc die-casting industry,ā according to the Idaho Geological Survey.
Between 1887 and 1981 the mine produced 35.9 million tonnes of ore, with lead grades of 8.76 percent, 3.76 percent zinc and 4.53 ounces per ton silver. Prior to its closure in 1981, the mine complex was responsible for 20 percent of US refined lead and zinc production and 25 percent of silver… |