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I-14 <br />• ROOF OF UPPER WHEELER SEAM(CONTINUED) <br />DEPTH, FT. GEOTECHNICAL DESCRIPTION <br />1016.3-1019.1 SILTSTONE: Light to dark gray; locally sandy and clayey; <br />convolute and croesbedded; abundant thin carbonaceous <br />stringers; solid interval; very well Indurated; hardness 8; <br />separations roughly along bedding planes closely spaced; <br />occasional minor low angle alickensldes; competent; estimated <br />compressive strength 45 MPs; good cavability; may form strong <br />stable roof; recovery 100X; RQD 91X; IA~846; ID~384; I~~2.2. <br />UPPER WHEELER COAL SEAM <br />DEPTH, FT. GEOTECHNICAL DESCRIPTION <br />1019.1-1040.6 COAL: Upper Wheeler Seam; clean; banded; broken from 1037.1' <br />to 1037.9' and from 1034.7' to 1040.6'; otherwise solid and <br />strong; hardness 6; strong randomly spaced cleat system <br />oriented 40° to 45° along which coal tends to divide easily; <br />• in most locations coal is intact, almost uacleated and resists <br />breakage; separations closely to moderately spaced; competent; <br />estimated compressive strength 15 MPs; recovery 100X; RQD 63X; <br />IA~98.0; ID~73.0; IAI,~ X1.3. <br />FLOOR OF UPPER WHEELERIROOF OF LOWER WHEELER SEAMS <br />DEPTH, FT. GEOTECHNICAL DESCRIPTION <br />1040.6-1042.0 CARBONACEOUS CLAYSTONE: Dull gray to black; silt content <br />increasing with depth; friable; thinly bedded; occasional <br />thin coaly stringers; solid interval; very well indurated; <br />hardness 6; smooth bedding plane separations closely spaced <br />(a~65°); occasional low angle •lickenaidee; fairly competent; <br />estimated compressive strength 35 MPs; good cavability; <br />fair bearing capacity; recovery 100X; RQD 29X; Ip~452; <br />ID~234; Ipti~1.9. <br />1042.0-1049.6 SILTSTONE; Mostly medit~ gray; clayey to sandy locally; <br />thinly bedded; solid interval; abundant thin carbonaceous <br />stringers; very well indurated; hardness 7; tight healed <br />• <br />SEEGMILLER INTERNATIONAL <br />