2014-03-06_REVISION - C1996083 ‎(3)‎

• Permit No: C1996083
• IBM Index Class Name: Revision
• Doc Date: 3/6/2014
• Doc Name: 2nd Adequacy Review
• From: DRMS
• To: Bowie Resources, LLC
• Type & Sequence: TR84
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

Bowie No. 2 Mine C 1996083 Technical Revision No. 84- Second Adequacy Review Page 2 of 15
additional information for the proposed revisions to depth and velocity and revise page 8 -29i to be
consistent with page EXH -8 -12, or restore the original values from the previously approved design.
7. BRL revised the reference and flow value on the table on page Exh -8 -29iii as requested, but the newly
revised page EXH -8 -31 indicates a minimum culvert size of 42" for Culvert H1. The design information on
page EXH -8 -168 indicates that a 30" pipe will be required, and BRL indicated in their response letter that a
42" pipe would be used. Please update the minimum size indicated on the table on page EXH -8 -31
consistent with the design on page EXH -8 -168 and include a note that the 42" culvert will be installed.
8. Response accepted. BRL revise the reference on the table on page Exh -8 -29iii as requested.
9. Response accepted. BRL corrected the table on page Exh 8 -31 as requested.
10. Response accepted. BRL corrected the table on page Exh 8 -31 as requested.
11. Response accepted. BRL corrected the table on page Exh 8 -31 as requested.
12. a. Response accepted. BRL corrected the table on page Exh 8 -31 and provided design information for
Culvert C -G4, as requested.
b. During the initial adequacy review, we did not notice that Culvert C -1327 had been removed from the
table on page EXH -8 -31. The culvert is still shown on Maps 15 -1 and 21 -1, and should therefore remain
on this table. Please restore the information for Culvert C -827 on page EXH -8 -31.
c. The newly revised page EXH -8 -31 indicates a flow value of 0.00 for Ditch D -E1. Please restore the flow
value of 1.79 for Ditch E -1 on page EXH -8 -31.
13. Response accepted. BRL revised the calculations and flow values for Ditch H1 on page Exh 8 -166 as
requested.
14. BRL revised the Table of Contents for Volume XI as requested, but the stability analyses continue to be
listed under Appendix A. It is our understanding that Volume XI would be organized consistent with
Volume IX, and that the stability analyses would precede Appendix A, with the material balance
information occupying Appendix A. Please review the Table of Contents for Volumes IX and XI, and if BRL
intends to have Volumes IX and XI be consistent, revise the Volume XI table accordingly.
15. This item will be addressed under Technical Revision No. 77.
16. Response accepted. BRL revised Page 3 of Volume XI, as requested.
17. Response accepted. BRL revised the text to indicate a maximum pile height. Depending on the final
outcome of the stability analysis for the increased height and slope configuration, this maximum height
may again require revision.
18. Response accepted. BRL verified that pages 4a and 4b of Volume XI will be retained.
19. Response accepted. BRL corrected page 5 of Volume XI as requested.
CIRCES Cost Estimating Soffi are