2019-12-112022-02-032019-12-112022-02-03https://hdl.handle.net/11124/173824Donor: Colorado Mining Association.View looking downslope at mill buildings of the Sandiago Tunnel on Treasure Mountain, Treasure Mountain Gold Mining Company.Caption reads: "Mill at Sandiago tunnel on Treasure Mountain San Juan Co. Sept. 26, 1941. Treasure Mountain Gold Mining Company."3 1/2 x 6 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Mineral processing plants -- ColoradoTreasure Mountain Gold Mining CompanyMills and mill-work -- Colorado -- San Juan CountyTunnels -- Colorado -- San Juan CountyStillImage