2019-11-202022-02-032019-11-202022-02-03https://hdl.handle.net/11124/173446Donor: Colorado Mining Association.Separator equipment, with a forested slope in the background.Caption reads: "Lake 11."4 1/2 x 3 1/2 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Mineral processing -- Machinery and equipment -- ColoradoSeparation (Technology) -- Colorado -- Lake CountyStillImage