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MINREC, INC. <br />2768 COMPASS DRIVE, SUITE 101 <br />GRAND JUNCTION, COLORADO 81506 <br />PHONE: (970) 245-4101, FAX 242-7906 <br />NORTH THOMPSON CREEK MINES <br />December 11, 2001 <br />Byron G. Walker, P. E. <br />Division of Minerals & Geology <br />1313 Sherman St., Room 215 <br />Denver. CO 80203 <br />Re: Minor Revision Application <br />Rating Chart <br />Permit No. C-81-025 <br />Dear Mr. Walker: <br />iii iiiiiiiiiiiiiiii <br />RECEIVED <br />DEC 13 2001 <br />Division of Minerals d Geology <br />The DMG's letter to Minrec dated November 29, 2001 requested a permitted level of <br />sediment for the over-designed culvert C-6. Enclosed is a flow rating chart that indicates <br />culvert C-6 will handle its design flow with 25.5 inches of sediment. The flow rating chart <br />should be incorporated into the permit in Appendix 4-B at page 4-B:9i. <br />Please let me know if you have any questions. <br />Sincerely, <br />~~~~ <br />J. E. Stover, P.E. <br />Consulting Engineer <br />