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October 15, 1999 <br />2.3 Testing Results <br />The maximum percolation rates of the material at increasing loads are presented on <br />Table 2. The maximum percolation rate of the material at all loads was measured as 0.045 <br />gpm/sf,. ten times the solution application rate used at CC&V. At all tested load <br />increments, no ponding of water was observed. <br />After the percolation - consolidation tests were completed, the ore sample was tested for <br />gradation to evaluate mechanical degradation under Ioad. The post -test gradation data are <br />presented in Figures 6 and 7. The post -test gradation data indicate an overall decrease in <br />percentage of the fine gravel fraction, with a corresponding increase in percentage of the <br />fine sand fraction. These results indicate that some mechanical degradation of the Cresson <br />ore does occur under loading. The amount of mechanical degradation is considered <br />insignificant. The percolation test data clearly show the ore is capable of supporting high <br />percolation rates, even under an equivalent heap height of 565 feet. <br />3.0 CLOSURE <br />If there are any questions or concerns regarding this report or the test data, please call us <br />at (303) 980-0540. <br />Sincerely, <br />GOLDER ASSOCIATES INC. <br />baud <br />David M. Dix <br />Laboratory Manager <br />John F. Lupo, Ph.D.. P.E. <br />Sr. Project Manager <br />DMD /JFL/11r <br />Attachments: Tables <br />Figures <br />1:'.99arS 3773TFS'_ DOC <br />-3- 993- 2075.003 <br />Golder Associates <br />i <br />