The Mines of Colorado |
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50 feet adit agent arastras Arkansas assays average beds Black Hawk Bobtail Boulder City California Central City claim Clear Creek County coal Colorado Colorado Territory copper crevice Crosby & Thompson Denver discovery dollars east eastern engine engine-house feet deep feet long fifty five Foot-hills fork four furnace Gold Mining Company Golden City gossan Gregory Gulch head hoisting hundred feet Idaho inches iron Kansas Kanyon Lake lodes machinery Middle Park miles miners mining district Moun mouth Nevada pans party Pass Pike's Peak placer mining Plains Platte pyrites Quartz Hill Range rich road rock Rocky Mountains Russell Gulch sandstone shaft silver sluice smelting snow South Boulder South Clear Creek South Park specimens Spring stamp mill stone stream summit Summit County surface tains Territory thousand feet timber tion tons town tributaries tunnel twelve twenty Valley vein wagon width Winter yield