International Smelting and Refining Company
The International Smelting and Refining Company was a subsidiary of Anaconda Copper that operated primarily out of the International Smelter near Tooele, Utah. The International Smelter began operation in 1910 as a copper producer handling ores from Bingham Canyon and was expanded into a lead smelting operation in 1912.
Source: Wikipedia — International Smelting and Refining Company (CC BY-SA 4.0)