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SEP-23-1994 11 11 GRRND URLLEY CORL CO <br />303 658 0344 P.02 <br />GRAND VALLEY COAL COMPANY <br />P.O. Box 70 <br />Loma, Colorado 815240070 <br />(303) 858-3608 <br />September 23, 1994 <br />Ms. Erica Crosby <br />Division of Minerals and Geology <br />1313 Sherban St. Room 215 <br />Denver, Colorado 80203-8106 <br />Re: Munger Canyon Mine, C-81-020 <br />Minor Revision; SA&-1 ~ SAS-5 <br />Dear Erica: <br />Saclosed are three copies of the calculations and justification for <br />the surface seater controls at the Munger Canyon Mine Site. Please <br />replace the existing calculations for SAE-1 in Appendix M (viii) of <br />Volume V and insert the calculations for SAE-5. <br />Please call if there are questions or if I can be of assistance. <br />Sincerely, <br />ohs M. Walters <br />Manager of Mine Services <br />