Results: 1 - 3 of 3
Sep 30, 1963
Information Series
… Board's estimate of the reserves that they contain. The … 300 and 2600 feet of overburden. Reserves have been estimated for … basis of the magnitude of the reserves and the adequacy of the …
Dec 31, 1975
Earth Sciences Report
… Group strata contain the largest reserves, with 628,000 million tons …
Dec 31, 1989
Open File Report
… area contains coal resources and reserves in the following …