Group of men standing on a long narrow footbridge in front of a silver mine and mill in San Gabriel Canyon, ca.1890 

Four men at the Bucket & Windlass, a prospecting shaft, Hard Cash Mine, Randsburg, ca.1900 

The Mohawk mine and mining facilities, Goldfield, Nevada, ca.1905 

Concentrator mill at a mine on the Colorado River, California, ca.1900 

Old mill used by miners at the Ten Stamps Mine, ca.1900 

Scenic view of the Mojave Desert and Providence Mountain from Bagdad Mine (the Chase Mill Site), Riverside, ca.1903 

Interior view of mine and miners in the Mohawk Mine, Goldfield, Nevada, ca.1900-1905 

A street scene of people boosting for tickets to the "Grand Ball" during the boom days at the mines, Goldfield, Nevada, ca.1905 

Canyon rim at Bass Camp, Grand Canyon, 1900-1930 

A smelter at a mammoth copper mine in Shasta County, California, ca.1900 

Gold mines and mining facilities, Goldfield, Nevada, ca.1904 

Tin mine complex owned by Colonel Robinson, Temescal, 1889 

View at the foot of the Hualpai Trail at Cataract Canyon, one of the canyons at the Grand Canyon, Arizona, ca.1900-1940 

Stack of thirteen bars of gold bullion from mining done at Lida Mine in Willow Springs, Kern County, ca.1930 

View of Sutter's Creek and the historical mine sites in Coloma, ca.1915 

Interior view of the Santa Ana Tin Mine, Orange County, March 20, 1903 

Inside a building at the Tin mines at Temescal, Riverside County, ca.1889 

Interior view of Bagdad mine on the 90 feet level, California, ca.1900 

Exterior view of a Santa Ana tin mine in Trabuco Canyon, March 20, 1903 

Miner's pack animals in front of mining supply stores, Goldfield, Nevada, ca.1900