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USGS Central Region Energy Resources Team

U.S. DEPARTMENT OF THE INTERIOR
U.S. GEOLOGICAL SURVEY

Coal recoverability in the Hilight quadrangle, Powder River Basin, Wyoming:
a prototype study in a western coal field

by
Lee M. Osmonson, Timothy J. Rohrbacher, Carol L. Molnia,
and Gerald L. Sullivan







 
Figure 7. Ratio of waste rock to coal (stripping ratio)


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U.S. Geological Survey Open-File Report 00-103

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