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Coal mine working face detail. Shows structure of coal. Coalmont district, Jackson County, Colorado. August 11, 1940.
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Eroded sandstone of Coalmont formation. Jackson County, Colorado. 1911. Plate 1-A in U.S. Geological Survey. Bulletin 596. 1915.
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Upper 30 feet of Riach coal bed. Coalmont. Jackson County, Colorado. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 596. 1915.
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Mined out rooms at south end of pit. Coalmont district, Jackson County, Colorado. August 11, 1940.
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Truck loading coal, south along face of stripped bench from point in Coalmont district, Jackson County, Colorado. August 11, 1940.
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Overview working face from north end strip pit, Note bony coal in left corner. Coalmont district, Jackson County, Colorado. August 11, 1940.
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Coalmont, open cut in foreground, Park Range in background, looking northwest. Jackson County, Colorado. 1911. Plate 11,in U.S. Geological Survey. Bulletin 596. 1915.
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Coalmont strip pit from "D" hub, Coalmont district, Jackson County, Colorado. August 11, 1940.