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J J Dudash -3- August 31, 2010 <br />9. The last sentence on revised page 115 of Section 2.05 states that the piezometer <br />at the West Mine is installed in the fill but currently is not being monitored. If this is <br />the fill that provided the bench for the mine facilities and which has been <br />destroyed, please provide an explanation in the text concerning the destruction of <br />the piezometer. <br />BRL - The last sentence on revised page 115 was revised to indicate that piezometer <br />OVWM was destroyed during the west mine reclamation project. <br />10. On revised page 124 of Section 2.05, BRL is proposing to eliminate the <br />requirement to install nine new piezometers in the reclaimed backfill at the East <br />Mine. The Division asks that BRL remove this request from PR-4 so that the <br />adequacy review of PR-4 is not complicated by an important side issue. BRL can <br />submit a separate technical revision to deal with this issue. However, BRL should <br />know that the Division considers the installation and monitoring of the piezometers <br />to be important due to the steep reclamation slopes. <br />BRL - BRL will delete revised page 124 from PR-04. <br />11. On the extreme western edge of the proposed new permit area, as shown on Map <br />4-1, there is a portion of the Bowie No. 1 mine workings in section 15 that lies <br />immediately east of the proposed new permit boundary. In addition, it is stated in <br />the first paragraph on revised page 2 of Section 2.05 that secondary recovery of <br />pillars and barrier pillars took place. Please demonstrate that the effects of <br />subsidence from these mine workings do not lie outside of the proposed new <br />permit area. <br />BRL - The permit boundary was amended in the subject area. <br />12. The Division has not finished its review of the ground water aspects of PR-4. <br />BRL - No comment required. <br />13. Please revise the Table of Contents pages for maps to indicate which maps show <br />the approved permit boundary. <br />BRL - Enclosed is a map directory for the table of contents which indicates whether a <br />map has the correct permit boundary, outdated permit boundary or not permit <br />boundary. <br />14. Attached is the Division's reclamation cost estimate for PR-4. The estimate is <br />comprised of eight tasks, a summary sheet and tasks 251-257, and represents a <br />decrease in liability of $45,039.00. The Division's estimate is more than BRL's <br />estimate of $40,244.00, due to updated costs. Please inform the Division in writing <br />whether the Division's estimate is acceptable to BRL.