2019-11-222022-02-032019-11-222022-02-03https://hdl.handle.net/11124/173509Donor: Colorado Mining Association.Yak Tunnel mine and mill buildings with tall smoke stacks, with mine dumps and snow-covered mountains in the background.Caption reads: "Yak Tunnel, Leadville. Portal buildings and mill, Mount Massive in background."8 1/2 x 6 1/2 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Underground mining -- ColoradoMine buildings -- Colorado -- Lake CountyMine drainage -- Colorado -- Lake CountyMines and mineral resources -- Colorado -- Lake CountyYak Tunnel (Colo.)StillImage