2014-01-16_REVISION - C1996083 ‎(2)‎

• Permit No: C1996083
• IBM Index Class Name: Revision
• Doc Date: 1/16/2014
• Doc Name: Adequacy Review Letter
• From: DRMS
• To: Bowie Resources, LLC
• Type & Sequence: TR84
• Email Name: SLB
• Email Name: SB1
• Email Name: MLT
• Media Type: D
• Archive: No

Page 3 of 8
13. Page Exh 8 -166, at the bottom of the page, lists flow from other ditches and culverts that
will flow through Ditch H1. The value listed for Ditch H1 is 0.46 cfs. The design above
indicates that the flow will be 1.06 cfs. Please revise the calculations and flow values for
Ditch H1 on page Exh 8 -166 so that they are consistent.
14. Please revise the Table of Contents for Volume XI to retain existing Appendices A and D
and incorporate new Appendices A and B. Existing Appendix C, the reclamation cost
estimate, can be removed since it has been incorporated into the reclamation cost
estimate in Section 3.02 of Volume 1.
15. Pages 2 and 4 of Volume XI have been revised to change the available topsoil salvage depth
from 2.4' to 1.0 -1.5', and the replacement depth from 2.4' to 1.0'. Please explain why the
available salvage depths and replacement depths are being changed, and demonstrate
that this change is consistent with the requirements of Rules 4.06.2(a) and 4.06.2(b).
16. On Page 3 of Volume XI, please insert an entry for "Height: xxx feet" after "Slopes:"
17. Revised page 4 of Volume XI states that the Gob Pile #3 height will be 120'; page 11 of
Volume XI states that the Buckhorn report confirms stability of Gob Pile #3 to a height of
110'. Please revise the text on page 4 to indicate a maximum pile height of 110' for Gob
Pile #3, consistent with the Buckhorn report. (Rule 4.10.4(2))
18. Based on the summary of revised pages, it appears that pages 4a and 4b of the currently
approved Volume XI will be retained; at this time these pages are pertinent information
that should be retained. Please verify that pages 4a and 4b of Volume XI will be retained
with TR -84.
19. Page 5 of Volume XI indicates that Pond J has been sized to contain approximately 4.0 acre
feet of water and 0.5 acre feet of sediment. This appears to be in conflict with the Pond J
Capacities table on the right edge of Map 22J, that says the As -Built Capacity for water is
2.68 ac ft and sediment is 0.91 ac ft. Please review and correct page 5 of Volume Xiso that
the stated capacities of Pond I are consistent with Map 221.
20. Paragraph 2 of the Inspection section, on page 9 of Volume XI, refers to underdrains being
covered with "excess spoil ". A term such as "coverfill" may be more accurate here. Please
review the use of the term "excess spoil" in paragraph 2 of page 9 of Volume XI and
revise, if appropriate.
21. BRL has provided a material balance sheet as new Appendix A to Volume XI. The volumes
proposed for cover fill and topsoil replacement may require revision depending on the
outcome of Item 15, above.
22. Drainage from the East and West Topsoil stockpiles, as currently approved, reports to Pond
J. The revised plan submitted by BRL indicates that drainage from these two stockpiles will
be discharged directly off -site via the East Clean Water Diversion and Culvert H -1. Map 21 -3