Cooper, Geo. W.Marks, John H. (John Henry)2018-07-242022-02-032018-07-242022-02-03https://hdl.handle.net/11124/172460Mine report no. 942.Typescript (carbon copy).reportsengIn copyright - non-commercial use permitted (http://rightsstatements.org/vocab/InC-NC/1.0/).Mines and mineral resources -- Colorado -- Clear Creek CountyOres -- Colorado -- Clear Creek CountyReport on the Columbine and the German tunnel group situated on Bellevue MountainText