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Second Adequacy Review Comments <br />Varra Coulson Mine Operations <br />Greeley, Colorado <br />Page 3 <br />7. Varra will implement the following slope monitoring program. All monitoring parameters will <br />be documented on a weekly basis and will, at a minimum, include the following: <br />1. excessive raveling; <br />2. mine wall slopes; <br />3. side wall seepage; <br />4. temporary/permanent load surcharges; and, <br />5. tension cracks. <br />Any tension cracks will be flagged, with the distance between markers measured on a weekly <br />basis for the first month after marking and monthly thereafter. All observations will be <br />documented in weekly Tailgate Health & Safety reports. <br />8. The recommended slopes for a stability factor of greater than 1.3 will be established in critical <br />areas. We assume that this requirement will be waved. <br />9. This requirement was used in the most recent stability analyses. <br />If you have any questions regarding this letter or attachments, please contact me at 970 - 590 -3807. <br />Sincerely, <br />AWES, LLC <br />Joby L. Adams, P.G. <br />Principal /Hydrogeologist <br />cc: Garrett Varra —Varra Companies, Inc. <br />Brad Janes — Varra Companies, Inc. <br />�w�s atyl 1 t ur Sl,tr C� urt, 1`t rl /,t Ilin�. 4 4 %( 01-d 4,14 P W ; %4 1 <br />