2019-12-122022-02-032019-12-122022-02-03https://hdl.handle.net/11124/173870Donor: Colorado Mining Association.Caption reads: "Hugh Chisholm, Ernie Michellod in front of Superior bldgs - Montezuma Colo. Summit Co."Two men wearing hardhats and work clothes stand in front of a building at the Superior Tunnel site.3 x 5 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Underground mining -- ColoradoMiners -- Colorado -- Summit CountyTunnels -- Colorado -- Summit CountyMontezuma (Colo.)StillImage