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<br />D. A. Berry - 3 - August 29, 1996 <br />10. DAtG - BRL added the location of the fault in question to MaF <br />No. 7, "Geology". The presence of this fault within the <br />near subcrop, shallower overburden portions of the <br />underground mine plan may have significant implications fur <br />the distribution of ground surface subsidence. BRL did not <br />address the earlier. adequacy comments regarding faulting <br />implications at the Bowie No. 1 Mine. However, the Bowie <br />No. 1. Mine's subsidence discussion, subsidence control plan, <br />and monitoring program will need to be amended to address <br />the implications of this fault. A thorr~ugh aerial <br />photographic analysis of the permit and adjacent area might <br />assist in defining the location of potential faults. <br />BRL feels 2.04.6 is an inappropriate section for a <br />discussion regarding faulting implications at the Bowie #1 <br />Mine. It also feels that this section is not the place to <br />address the subsidence control plan and monitoring program. <br />BRL covered these topics in the first adequacy response in <br />section 2.05.6 and in further detail in Exhibit 15. <br />BRL agrees that normally a thorough aerial photographic <br />analysis of the permit and adjacent area might assist in <br />defining the location of existing faults. Dames 6 Moore <br />performed a fault study for the Bowie No. 1 Mine in 1981. <br />They had virtually no success using aerial photographic <br />analysia to identify faults even when subsurface data <br />indicated fault locations. There is no indication of any <br />other faulting in the subsurface data collected from the <br />Bowie No. 2 Mine property other than the indicated fault <br />shown on Map-07. <br />11. DMi; - This question requires from ARL. Additional <br />discussion regarding the acid base potential of the coal to <br />be mined is needed. <br />BRL - Page 2.04-18 was revised to expand the discussion of <br />the acid base potential of the coal to be mined. Sncloaed <br />are revised pages 2.04-18, 19, 20, 21 and laboratory results <br />from SOLTESCO to be inserted in Volume IIi, Exhibit 6. <br />12. DMG - The text on pays 2.04-?.2 references 3.3 drill hole <br />completion drawings, and that there are only I2 completion <br />dra+~inys i.n Volume 3, Exhi.hit 3. Fleaae submit the <br />remaining completion drawing. Also, the application should <br />add refer.•ences to the eorapl.etion drawiriy fo.r DH-38 and to <br />the missing completion drawing on the cover page for that <br />Exhibit. <br />BRL - The missing completion drawing for DH-13 is enclosed. <br />The "cover page" for Exhibit 3 was intended to assist the <br />DMG in placing the revised material in the correct location <br />