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The A bed lies below. the B. bed , and while the <br /> Y • two seams converge occasionally , they are separated in <br /> places by a shale parting which reaches as much as 39 ' <br /> thickness . <br /> The coal quality of the A bed is inferior to <br /> that of the "B"Bed and mining of the seam has , heretofore, <br /> been unfeasible . However , Mid-Continent recently contracted <br /> with the U. S . Department of Energy to pioneer a multilift <br /> mining operation which, if feasible, will allow for an <br /> economic recovery of both the B bed and the underlieing A bed . <br /> Coal qualities of the A bed average : <br /> Fixed Carbon 59. 3 percent <br /> Volatile Matter 20. 9 <br /> Ash 19. 7 <br /> Sulfur 0. 58 <br /> • Btu 14 , 500+ <br /> Moisture free <br /> The Placita bed overlies the Middle bed , <br /> with a stratigraphic separation of approximately 250 ' . The <br /> bed is thin and irregular , the coal quality is inferior , the <br /> reserve small. In addition, no outcrops of the Placita bed <br /> are known to exist . The bed is thus considered to be <br /> commercially unminable. <br /> Exploratory drilling in the Placita bed over <br /> an area of four square miles indicated the following thickness : <br /> Drill Hole Coal Thickness <br /> CB-4 : 6 . 8 feet <br /> • CB-6 : 2 . 7 feet <br /> CB-7 : 2 . 0 feet <br /> CM-8 : 6 . 2 feet <br /> 19 <br />