This 1883 photo from the Copper Queen mine at Bisbee, Arizona shows a crew of miners posing on timbering, with cribbing behind them supporting a massive section of rock.
View of Bisbee Smelters ca. 1900
Interior view of the Copper Queen smelter early 1890s
Part of the Copper Queen mine operations at Bisbee, Arizona ca. 1900
Bucyrus steam shovels start the open pit at Bisbee 1918
Miners pose by a three-ton piece of malachite and azurite from the Copper Queen Mine. The specimen was displayed at the Chicago World's Fair of 1893