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Golder As. <br />200 Union <br />Lakewood, <br />Telephone <br />Fax (303) <br />sociates In• <br />Boulevard, Suite 500 <br />CO USA 80228 <br />(303) 980-0540 <br />985-2080 <br />November 8, 1994 <br />Pikes Peak Mining Company <br />2755 State Highway 67 <br />Victor, Colorado 80860 <br />Attention: Mr. John Hardaway <br /> <br />Associates <br />RE: CRESSON HEAP LEACH PAD - INTERFACE SHEAR TEST RESULTS USING <br />VARYING PERCENTAGES OF CARLTON AND GOLDSTAR TAILINGS, PART 2 <br />Dear Mr. Hardaway: <br />This letter transmits the results of the last (No. 4 of 4) large- <br />scale interface shear test that was performed at the request of the <br />Mined Land Reclamation Division (MLRD). The results of the first <br />three large-scale interface shear test were discussed and presented <br />in Golder Associates Inc.'s (Golder) October 10, 1994 letter to <br />Pikes Peak Mining Company (PPMC). Briefly, the testing was <br />performed to quantify the effect of the Carlton mill tailings and <br />Goldstar tailings that have been placed on the surface of the <br />prepared Ironclad tailings (soil liner) to provide a smoother <br />interface prior to geomembrane liner placement. <br />The sample selection and testing procedure were described in the <br />October 10 letter. That same selection process and testing <br />procedures were followed for this fourth test and a discussion will <br />not be repeated in this correspondence. <br />Results obtained from the previous three large-scale tests and the <br />fourth large-scale are presented in the following table. <br />Configuration Peak Int. Friction Peak Cohesion Residual Int. Residual Cohesion <br /> (') (psf) Friction (') (psf) <br />Cazlton Tails - 23 1010 23 1010 <br />30$ <br />Cazlton Tails - 24 1045 24 1045 <br />60$ <br />Goldstaz Tails - 24 740 24 740 <br />30$ <br />Goldstaz Tails - 24 385 23 520 <br />60$ <br />Repeating the conclusion presented in the October 11, 1994 letter: <br />