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Strippable Coal Resources of Colorado. Location, Tonnage, and Characteristics.

Speltz CN
NTIS: PB 257 782 :70 pages
Coal resource data from public and private sources, in conjunction with previously published data, were used by the Bureau of Mines to determine the location and extent of strippable coal resources in Colorado. All Colorado coal is either Cretaceous or Tertiary in age. Cretaceous coals occur in the Dakota sandstone, the Mesaverde group, and equivalent formations while Tertiary coals occur in the Dawson Arkose, the Fort Union and the Wasatch Formations, and equivalent formations. The strippable coal ranges in rank from bituminous in the Yampa region to ligniferous in the Denver Basin. All this coal is low in sulfur content (less than 1 percent); ash content is low to high; heating value ranges from 3,000 to 12,000 btu's per pound. Ash from the lignite of the Denver Basin was found to contain an abnormally high percentage of kaolinite which conceivably could be recoverable as alumina. Total strippable resources of approximately 18 billion tons were estimated in 12 separate coal regions, fields, or deposits. Coal recoverable by contour mining techniques was not included. Criteria used in defining strippable resources were a minimum coalbed thickness of 2 feet and a maximum overburden thickness of 150 feet, except where the coalbeds are of exceptional thickness. (Out of print.)
Publication Date
Document Type
IH; Information Circular;
Fiscal Year
NTIS Accession No.
NTIS Price
Identifying No.
IC 8713
Source Name
NTIS: PB 257 782
Page last reviewed: December 3, 2021
Content source: National Institute for Occupational Safety and Health Education and Information Division