Remaining strippable coal resources and strippable reserve base of the Hanna Coal Field in southcentral Wyoming
It is estimated that 674.31 million tons of strippable coal resources remain in four newly defined mining districts of the Hanna Coal Field in southcentral Wyoming. Of these strippable resources, 46% or 309.97 million tons lie between 0 to 100 feet of cover while the other 54% or 364.34 million tons lie between 100 to 200 feet of cover. The remaining strippable reserve base or that part of the strippable resources from which strippable reserves are derived, is reduced to 648.29 million tons (96% of strippable resources). Forty-six percent or 297.12 million tons of the reserve base occur under less than 100 feet of cover while the remaining 351.17 million tons occur under thicker cover (100 to 200 feet thick). Although strippable reserves per se (recoverable reserves) were not estimated, a fair approximation is that strippable reserves equal at least 80% of the reserve base between 0 to 100 feet deep or 237.7 million tons. Although some percentage of the reserve base between 100 to 200 feet deep is also recoverable, the percentage is harder to estimate. Applying the same rule of thumb that strippable reserves may equal 80% of that tonnage as well, another 280.94 million tons of reserves is identified for a total of 518.64 million tons of strippable reserves in the Hanna Coal Field. A more conservative appraisal of strippable reserves in the 100 to 200 feet depth range is half the reserve base or 175.59 million tons, thus reducing the remaining reserves to 413.29 million tons. With the exception of 9.44 million tons of strippable bituminous resources in the 0 to 100 feet overburden category and another 6.65 million tons in the 100 to 200 feet overburden category, all the strippable resources and strippable reserve base in the Hanna Coal Field are of subbituminous rank.
- OSTI ID:
- 5722498
- Report Number(s):
- NP-24017
- Country of Publication:
- United States
- Language:
- English
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Strippable coal reserves of Wyoming. Location, tonnage, and characteristics of coal and overburden
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Related Subjects
011000* -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
COAL
COAL DEPOSITS
COAL MINING
COAL RESERVES
DATA
DATA FORMS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
INFORMATION
MINING
NORTH AMERICA
NUMERICAL DATA
RESERVES
RESOURCES
ROCKY MOUNTAIN REGION
SUBBITUMINOUS COAL
SURFACE MINING
TABLES
USA
WYOMING