2019-12-132022-02-032019-12-132022-02-03https://hdl.handle.net/11124/173911Donor: Colorado Mining Association.Caption reads: "Golden Cycle Mill tailings, water barrier for blowing tails. (2)."An active water barrier at tailings, Golden Cycle mill, with grassy hill in the foreground and mountains in the background.10 x 8 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Gold ore processing -- ColoradoMineral processing plants -- ColoradoMine dumpsStillImage