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303-279-8532 <br />303-279-1609 Fax <br />TECHNICAL MEMORANDUM <br />To: Anne Beierle and Tony Lncero, Henderson Mine <br />From: Mike EIis <br />Date: September 10, 2002 <br />Subject: Henderson Tailing Pond Geo-Grid Installation <br />You asked that I submit the cost estimates as I finished with them to facilitate your <br />responses to DMG. The fourth one I have completed is the installation cost estimate for <br />geo-grids, which is attached for your perusal. My cost basis for this estimate is the study <br />I did for Climax Mine last summer on a 2.67-acre test plot on Robinson Tailing Pond. <br />Attached is a report that details the results-including costs~f the Climax test plot <br />study. <br />I computed ageo-synthetic cost of about $2,470,000 for the Henderson tailing facility. <br />This compares with DMG's cost estimate of $3,984,046. <br />My back-up sheets and technical memorandum to you are attached. Call me if you have <br />any questions. <br />Attachments <br /> <br />Ellis Environmental Engineering, Inc. <br />4342 Ulysses Vnay <br />Golden, Colorado 80403 <br />