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October 11, 1999 <br />load. The post - consolidation grain size distribution is presented in Table 1 and Figures 9 <br />and 10. The post -test gradation results indicate an overall decrease in percentage of the <br />fine gravel fraction, with a corresponding increase in percentage of the fine sand fraction. <br />These results indicate that some mechanical degradation of the Drain Cover Fill does occur <br />under loading. The amount degradation is considered insignificant, as evident with the <br />measured high permeability under load. <br />4.0 CLOSURE <br />If there are any questions or concerns about this report or the information contained in it, <br />please call us at (303) 980 -0540. <br />- Sincerely, <br />GOLDER ASSOCIATES INC. <br />David M. Dix <br />Laboratory Manager <br />John F. Lupo, Ph.D., P.E. <br />Sr. Project Manager <br />DMD /JFL/llr <br />-3- 993- 2075.002 <br />Attachments: Tables — <br />Figures <br />REFERENCES <br />Van Zyl, 1988. Introduction to Evaluation, Design and Operations of Precious Metal <br />Heap Leaching Projects. Society of Mining Engineers. <br />