After the concrete foundation was completed in May 1918, construction of the stack began on May 23, 1918 and was completed on November 30, 1918. It was placed into operation on May 5, 1919. It was built by the Alphons Custodis Chimney Construction Company of New York (now Hamon Custodis) under the direction of W. C. Capron, mechanical superintendent of the Washoe Smelting Company. Much of the ore the smelter processed after 1955 came from the Berkeley Pit just north of Butte, Montana.

A great story: https://www.mtpr.org/montana-news/2018- ... d-hellhole