The Bonanza Mill in upper Chase Gulch in Gilpin County, Colorado, has two, tall smokestacks protruding from its roof. Tailings from the mine are in the foreground in front of the mill, located near Blackhawk. Additional mines dot the hills...
across the creek from the tracks. A building stands in the background at the base of a rocky hill. The tracks of the Gilpin Tramway run around the hillside in midground.; The Hidden Treasure Mill in Gilpin County, Colorado, stands in the center of...
Gilpin County (Colo.)--1890-1900.; Mills--Colorado--Gilpin County--1890-1900.
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