2019-12-062022-02-032019-12-062022-02-03https://hdl.handle.net/11124/173634Donor: Colorado Mining Association.A man standing on a wood scaffold among trees; snow is on the ground.Caption reads: "At Mineral Farm mine: - Guess what this foundation is for?"5 x 8 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Underground mining -- ColoradoSilver mines and mining -- Colorado -- Ouray CountyLead mines and mining -- Colorado -- Ouray CountyMineral Farm Mine (Colo.)StillImage