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K <br />RECEIVED <br />Binns, Janet n IKI n n ?nno <br />From: MacDonald, Don [Don.MacDonald@MOLSONCOORS.COM] _ +amation, <br />Sent: Tuesday, June 09, 2009 10:46 AM Mining and Safety <br />To: Binns, Janet <br />Subject: FW: Technical Revision No. 40 --- Keenesbur Mine n <br />Attachments: memo Volume Response DRMS.doc <br />Janet - <br />I can't say that I know where it went, but we didn't receive your letter dated May 22nd, concerning TR 40 Adequacy <br />Review until last Wednesday (June 3). After reviewing your comments/concerns, I asked AEC to please respond with <br />what they could provide relative to the origin of the numbers. Danny and I then looked at the response and discussed it <br />further with them. Seems that what we are primarily dealing with are discrepancies caused by initiating this process in <br />2008, then electing to wait a year to insure that the concerns and values were valid. When the calculations were redone <br />for the submittal this year, a few of the values that should have been updated were missed, and this has unfortunately <br />added to the confusion. It is probably my fault for wanting to wait and "be sure", before submitting. <br />Anyway, please review the Memorandum from AEC (Curt Ahrendson) attached, and see if the explanation of the <br />differences in values addresses your concerns. If you wish a revised letter from us with respect to the TR (to include <br />AEC's memo) please so advise, and we will get it to you forthwith. <br />Thanks for working through this with us, and again sorry for the delay, <br />Don <br />Donald W. MacDonald <br />Coors Energy Company <br />Golden, Colorado 80402 <br />tel. 303 277-3455 <br />fax 303 277-3833 <br />email don.macdonaldO-coors.com