Barbre, Thos. J.2019-12-062022-02-032019-12-062022-02-03https://hdl.handle.net/11124/173663Donor: Colorado Mining Association.Photographed by Thos. J. Barbre.Caption reads: "No. 4205. Treasury Tunnel. Ouray, Colorado. Muck is dumped in cars of 90 cubic foot capacity at the dump a few hundred feet from the portal of the bore. Cars are of Granby type and are dumped by means of an extended, removable arm which runs over a movable ramp."Men operate cars to dump muck at the Treasury Tunnel dump.9 1/2 x 7 1/2 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Underground mining -- ColoradoMining -- Machinery and equipmentMine dumpsLead mines and mining -- Colorado -- Ouray CountySilver mines and mining -- Colorado -- Ouray CountyMiners -- Colorado -- Ouray CountyStillImage