Ashbaugh, Lewis E.2022-12-082022-12-08https://hdl.handle.net/11124/15561Scale approximately 1:7,000.Blueline.Relief shown by contours.Photocopy."Tunnels and veins from U.S. Geol. Survey Prof. Paper 63. Patented claims from county records under U.S. Gov. laws - "T.4 S., R.74-75 W., Silver Plume Mining District shown.27 x 43 cmmine mapsengNo Known Copyright: http://rightsstatements.org/vocab/NKC/1.0/.Mines and mineral resources -- Colorado -- Clear Creek County -- MapsProminent mine tunnels and veins and Cyclone gold-silver claims at Silver Plume, Clear Creek Co., ColoradoCyclone gold-silver claims at Silver PlumeSilver Plume mining districtStillImage