Estimate of Known Recoverable Reserves and the Preparation and Carbonizing Properties of Coking Coal in Overton County, Tennessee Page: 1
vi, 27 p. : ill., maps ; 27 cm.View a full description of this report.
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1
SUMMARY AND CONCLUSIONS
Reserves
1. The investigation shows that the bed identified as Wilder in this report is
the only bed in Overton County that has produced commercial coal and is the only bed
in which coal reserves were estimated for this report. Three other coal horizons
were recognized but lacked enough data for reserve estimates.
2. Known measured and indicated reserves of coal, based on a minimum bed
thickness of 14 inches and on 1,800 tons per acre-foot of coal in place, are esti-
mated to be 19 million short tons, as of January 1, 1953. Of this total, 10 million
tons represents coal 28 inches and more thick. Areas of the Wilder bed were omitted
from the estimate because available data relative to the bed characteristics were
too meager for making an estimate that conforms with the definitions of measured and
indicated coal adopted for this study. Should future drilling or development prove
reserves in these areas, such reserves should be added to the total estimated
reserves.
3. Recoverable reserves of coal are estimated in beds 28 inches and more
thick. This thickness is about the minimum now being mined by hand loading onto
conveyors in the Appalachian region. The weighted average recovery of the Wilder
bed in Overton County, as determined by this investigation, is 58.6 percent. This
percentage is based on the total thickness of coal in the bed (less partings 3/8
inch thick or more) rather than on the thickness of the coal mined. Based on the
weighted average percentage of recovery for the Wilder bed in Overton County, the
recoverable reserves of coal are estimated at 6 million short tons. Overton County
cannot be considered one of the major coal-producing counties in the State.
Coal Analyses
Analyses of 16 face and tipple samples and 2 samples of delivered coal from the
Wilder bed in Overton County have been tabulated. Fourteen of the samples were
taken before July 1947. Three of them were taken in 1953. This coal is of high-
volatile-A bituminous rank moderately high in ash and high in sulfur. The analyses
show a volatile content range on the moisture-free basis of 34.0 to 39.0 percent,
and a sulfur content from 2.5 to 5.2 percent. The ash content ranges from 8.1 to
16.6 percent.
Preparation
Screen-sizing, crushing, and float-and-sink tests were made on the three large
channel samples taken from the Wilder bed in 1953. The resulting data show that
coal from this bed in Overton County has a high sulfur content, which cannot be re-
duced enough by mechanical cleaning to make it suitable for use in making metallur-
gical coke. Even after crushing to a top size of 14-mesh, the float 1.40 fractions
from the 3 samples contained 2.16, 2.14, and 1.70 percent sulfur. On the other
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Williams, Lloyd; Abernethy, R. F.; Gandrud, B. W.; Reynolds, D. A. & Wolfson, D. E. Estimate of Known Recoverable Reserves and the Preparation and Carbonizing Properties of Coking Coal in Overton County, Tennessee, report, May 1955; [Washington D.C.]. (https://digital.library.unt.edu/ark:/67531/metadc38623/m1/11/: accessed July 18, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.