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Please inform the Division in writing whether or not the Division's reclamation cost estimate <br />calculation is acceptable to BRL. <br />13. All references to the gob vent boreholes mentioned in item number 12 above were removed from <br />Map-09. However, please also remove these references in the table on permit application page 2.05- <br />34. <br />Geotechnical Review <br />14. Maleki Section 2.0 - Data Collection Program <br />Three geotechnical holes were drilled, and are illustrated on Figure 1. The locations of these three <br />holes with respect to one another differ from what is shown on Map 09. <br />Please verify that locations shown on Map 09 for geotechnical holes TC-03-01, TC-03-02 and <br />TC-03-03 are accurate, and revise if necessary. <br />15. Page 6 of the Maleki report states that holes TC-03-02 and TC-03-03 "were drilled directly above <br />the projected location of the mains." TDR cables were cemented in all three holes (see Page 8), <br />providing a means of "identifying the location of bed separation and shearing along the entire <br />overburden." With the new proposed location of the West Mains, the TDR cables installed <br />previously would not seem to be able to provide BRL with the same level of information. <br />However, revised pages 2.05-120 and -125 describe and list four subsidence monuments proposed <br />for the vicinity of the West Mains, in a manner consistent with monuments established elsewhere <br />at the mine. <br />No response required. <br />16. Maleki Section 3.0 - Geotechnical Framework <br />Section 3.1 describes the geologic. setting of the Somerset Coal Field and the Bowie No. 2 Mine. <br />The "West Mains fault" is addressed at the bottom of Page 9, but does not appear on Figure 1 of <br />Maleki. A faint, dashed line does appear on revised Map 27 (and on PAP Map 07 - Geology) in <br />the approximate location described by Maleki. Map 08 (Geologic Cross Section) of the PAP <br />clearly illustrates the interpreted magnitude of the fault, and implies a near-vertical plane. Due to <br />the potential significance of this feature, its existence should be clearly indicated on each Map for <br />which the fault may be pertinent. <br />At a minimum, please modify Maps 07, 14-B and 27 to clearly portray the location of what the <br />Division understands to be the "West Mains fault": For Map 07, it maybe more accurate to <br />illustrate the location on the surface, if known, rather than at the B- or D-seam depth. <br />17. Maleki Section 4.0 - Mains Orientation and Pillar Designs <br />The stability of near-seam strata was evaluated at the corridor for the layout illustrated in Maleki <br />Figure 1. An empirical technique developed by NIOSH was used to confirm that the (then-