Laserfiche WebLink
CCBU Gold Mng . ID : APR 30 '96 20 :29 No .030 P .04 <br /> Golder ustoelell"Inc. 7 ��w�. <br /> 200 Union Boulevard,Suite 500 Go lle <br /> Lakewood,CO USA 80228 *Assockdes <br /> Telephone(303)980.0540 <br /> Fox(303)985-2080 <br /> April 29, 1996 Our Ref: 943-2847.003 <br /> Cripple Creek & Victor Gold Mining Company <br /> 2755 State Highway 67 <br /> Victor, CO 80860 <br /> Attention Mr. Ron Roberts <br /> RE. CLASSIFICATION AND PERMEABILITY TEST RESULTS FOR 1996 <br /> CLAY AREA SOIL LINER FILL SAMPLES <br /> Dear Ron; <br /> Golder Associates Inc. (Golder) has evaluated the 1996 Clay Area material that has been <br /> proposed for use as Soil Liner Fill during 1996 Phase 11 construction activities. Golder <br /> would like to take this opportunity to present the test results from the permeability, <br /> interface shear strength and index testing of the samples to the Cripple Creek & Victor <br /> Gold Mining Company (CC&V). <br /> Index testing, such as grain size distribution and Atterberg limits, were performed to <br /> identify the uniformity of the material. Results from these tests arc presented in <br /> Attachment A, and summarized in Table 1. <br /> Golder has completed the permeability tests for 3/4 inch minus portions of selected clay <br /> area samples. Results are presented in Attachment B, with results sununarized in Table 1. <br /> Permeability tests were performed on samples with a variety of gradations and Atterberg <br /> limits, compacted to approximately 95 percent standard Proctor maximum dry density and <br /> approximately three percent dry of optimum. The permeability tests were performed using <br /> a flexible wall pernreameter with back pressure saturation and a constant rate of flow <br /> (ASTM D5804, Method D). This approach is consistent with permeability testing that was <br /> performed for the Ironclad material that was documented in the 1994 and 1995 Phase I <br /> certification reports. hour permeability tests were performed on the 3/4 minus portion of <br /> the clay area samples, with the 3/4 inch minus permeability measured varying from 10-1 to <br /> 10-8 cm/sec. <br /> Interface shear strength testing was performed in general accordance with the American <br /> Society for Testing and Materials (A•STM) Standard Test Method D5321, "Determining rite <br /> Coefficient of Soil and Geo3ynrhetic or Geosynthetic and Geotynthetic Friction by the <br /> Direct Shear Method". Tests were conducted at normal stresses ranging from 50 psi to <br /> 300 psi in a direct shear device containing an upper and lower shear box. When samples <br /> were subjected to normal loads of 50 psi to 150 psi, the upper shear box measured 12 <br /> inches by 12 inches in plan and 3 inches in depth. The lower shear box measured 12 <br /> OFFICES INAUStRALIA.CANADA,GERMANY.HUNGARY.ITALY.SWEDEN.UNITED KINGDOM.UNITED STATES <br />