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Loloff AM -01 Second Adequacy Letter <br />Page 3 of 3 <br />August 4, 2015 <br />6.4.7 Exhibit G - Water Information <br />12. The Division engineering staff has reviewed and accepts the MODFLOW model and report dated <br />July 13, 2015 by McGrane Water Engineering, LLC. <br />13. Please provide mitigation measures for the groundwater mounding and shadowing effects due <br />to the proposed slurry wall to be implemented and trigger points which would put mitigation <br />measures into effect. The mitigation measures must include a scenario for the installation of a <br />French drain to direct groundwater around the slurry wall and restore groundwater levels to the <br />historic elevation in area of groundwater mounding. <br />The Applicant was not required to respond to Item #14 from the May 19, 2015 adequacy letter. <br />6.4.18 Exhibit R - Proof of Filing with County Clerk and Recorder <br />15. Please provided an affidavit or receipt indicating the date on which the revised application <br />information required to address this adequacy letter was placed with the Weld County Clerk <br />and Recorder for public review, pursuant to Subparagraph 1.6.2(1)(c). <br />6.5 Geotechnical Stability Exhibit <br />16. The Division staff is reviewing the updated stability analysis dated July 2015 from AT <br />Consulting, Inc. The Division will contact the Applicant under separate cover if additional <br />information is required. <br />Please be advised the Loloff Mine amendment application may be deemed inadequate, and the <br />application may be denied on August 31, 2015, unless the above mentioned adequacy review items <br />are addressed to the satisfaction of the Division. If more time is needed to complete the reply, the <br />Division can grant an extension to the decision date. This will be done upon receipt of a written <br />waiver of the Applicant's right to a decision by August 31, 2015 and request for additional time. <br />This must be received no later than the deadline date. <br />If you have any questions, please contact me at (303) 866-3567 Ext. 8124. <br />Sincere <br />Peter S. Hays <br />Environmental Protection Specialist <br />Cc: Wally Erickson, Division of Reclamation, Mining & Safety <br />J.C. York, AT Consulting, Inc. (email) <br />