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iii iiiiuiiiiiu iii <br />899 <br />~3 <br />EXHIBIT 70 <br />MOUNTAIN COA~I: COMPANY <br />West Elk Mine <br />REFUSE PILE EXPANSION , <br />Submitted u Technical Reviliou No. 79 to CDMG Permit C-80-00"7 <br />January 1997 <br />Revised June 1999 Technical Revision No. 90 (to reflect constractiou to date) <br />~~ By. <br />Loren A.Jalbert <br />Project Engineer <br />Harding Lawson Associates <br />Phil Meis <br />Project Engineer <br />Harding Lawson Associates <br />Charles C. Rehn, P.E. <br />Principal Engineer <br />Harding Lawson Associates <br />~~ <br />