2015-02-10_REVISION - C1996083 (2)

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Jason Musick -2- February 2, 2015 submitted with the application. These pages appear to be intended to revise /replace Page 5 of the June 1996 WesTec report. Please annotate the coverpage of the 1996 WesTec report to indicate that a portion was revised with TR -97 (and with TR -64). Please also note the revision in that report's entry in the TOC. (Modifying a portion of a document prepared and certified by another party is not generally done; at a minimum, any revisions should be re- certified by the party responsible for the changes.) BRL: It is agreed upon, that modifying work certified by another party is not generally done, and as such, revisions to Volume IV in the past have simply revised the text to direct the reader to the updated designs. Therefore, new /revised designs are no longer part of Volume IV and a certification should not be required. Page 5 was revised by JE Stover & Associates with TR -64 in 2009 and TR -97. New page 5i was submitted with TR -97 due to page numbering. The second paragraph of page 5 directs the reader to Volume IX and Volume III. Since no new designs are incorporated into Volume IV a certification should not be required. Please see revised Volume IV Table of Contents page i, which details the work of TR- 97 and directs the reader to Volume IX. 2. DRMS: The 1999 Lambert report appears to address the question of stability for what is now known as Gob Pile #1. If this is the case, it would make better sense to include the new HBET Analysis in Volume IV rather than Volume IX, since Gob Pile #1 is covered by Volume IV, Gob Piles #2 and #4 are covered by Volume IX, and Gob Pile #3 is covered by Volume XI. Please consider whether the 2014 HBET Analysis should be located in Volume IV rather than Volume IX, and revise the Volume IV and Volume IX tables of contents as necessary, BRL: The organizational issue discussed by DRMS is one that was contemplated by JE Stover & Associates while going through the TR -97 process. JES determined that it was better, for liability purposes, not to substantially revise Volume IV. Changes made to Volume IV text have generally been to direct the reader to locations where the revised designs would be incorporated. The footprint of gob pile #1 was reduced substantially when gob pile #2 was expanded to the west (otherwise known as gob pile #4). Volume IV is rarely used, and as pointed out by DRMS and recognized by JES, compiled by a different company. For these reasons, it is more prudent to place revised materials in Volume IX. Volume IV page i of will direct the reader to the stability analysis in Volume IX. Please also see revised page Volume IX TOC page xiii. Volume IX Coal Mine Waste Disposal Area No. 2