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..,' ~4 <br />Memo to Dan Mathews <br />Munger Canyon Stability Analyses <br />page 2 <br />In addition, GVCC mentioned an intention to use coal waste from the <br />Fruita loadout to partially backfill the mine portal bench. But no <br />indication of this intention was evident on the mine portal bench <br />analytical cross sections, and no material properties were provided <br />for this material. In response to my adequacy comment, Mr. Walters <br />has amended the cross sections to indicate the location of the <br />backfilled coal waste. Further, Mr. Walters has completed the <br />analyses with and without the coal waste material and has used <br />conservatively low strength parameters for the coal waste. <br />Finally, John has agreed to complete sieve analysis of the coal <br />waste to demonstrate that it does not contain a significant coal <br />fines fraction. <br />With this amended submittal, Mr. Walters has resolved my earlier <br />concerns regarding the geotechnical aspects of GVCC's proposed <br />revision application. I my opinion, the geotechnical aspects of the <br />proposed haul road and mine portal bench reclamation plans are now <br />be acceptable to the Division. <br />cc: Larry Routten <br />doc: M:\COAL\JAP\MUNGERSA.SUP <br />JP/JP <br />