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0 <br />Mr. Mike Boulay <br />March 13, 2014 <br />Page 2 <br />mining operation. Geotechnical laboratory density testing methods may not work well, or at <br />all, on the irregular and highly variable backfill material. To accommodate this circumstance, <br />compaction testing on all haul roads will be accomplished by Proof Rolling utilizing heavy <br />wheeled mine haulage equipment. <br />5. Map 2.05.3(3) has been resubmitted as a full size map. <br />If you have any questions regarding the enclosed responses, please contact Chris Gilbreath at <br />(303) 254 -3291 or egilbreathgtristate .ort;. <br />Sincerely, <br />� f <br />arbara A. Walz <br />Senior Vice President <br />Policy and Compliance <br />Chief Compliance Officer <br />BAW:JS:pvt <br />Enclosure <br />cc: Mike Boulay, DBMS, Grand Junction <br />Jason Storey (via email) <br />Tony Tennyson (via email) <br />AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy' COOPM.itive _ <br />