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<br />L•XPLANpTI~I OF TABLE F-1 RESERVES <br />Northern Coal Company in the Mine Permit Application lists the <br />mineable reserves as 205,666,500 tons and the recoverable reserves <br />as 83,270,273 tons with a recovery factory of 40%. <br />The apparent substantial difference can be explained as follows: <br />1. All five of the mineable seams have azeas along the outcrop <br />where "burn" occurs, <br />2. Areas of coal have been excluded from the mine plan because <br />there is less than the 7 ft minimum coal seam height required <br />to economically mine them, <br />• 3. Substantial areas of the P-seam have been discounted <br />because of inseam rock splits in excess of 1 ft. Mining of <br />azeas having greater than 1 ft inseam rock or bore would <br />make the coal product ash content in excess of 20% deeming <br />it unsaleable, <br />4. Areas near the outcrop have been discounted because of <br />having less than the minimum thickness of overburden <br />required to reasonably assure favorable mining conditions. <br />Minimum overburden thickness used in calculating mineable <br />azeas of the total reserve was ±200 ft. <br /> <br />F-14a <br />