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Engineers and Geologists <br />FIELD INVESTIGATION <br />Test holes were drilled using a CME-55 drill rig capable of drilling <br />and sampling. The test holes were drilled on May 20, 1981 using a con- <br />ventional four inch continuous flight power auger and a six inch con- <br />ventional hollow stem auger was used to prevent side walls of test holes <br />from caving during advancement of the hole.A staff geologist along with <br />a driller and helper comprised the field crew which drilled, sampled <br />and lithologically logged the test fioles. <br />Refer to Figure 3, Test Hole Location Plan. Test Holes 1 through 5 <br />were drilled along the crest of the haul road embankment. Test holes <br />6 and 7 were drilled at the bottom of the drainages adjacent to the haul <br />road embankment. Test holes 1, 5, and 7 were drilled 30 to 45 feet (9.1 <br />to 13.7 meters) deep; Test Holes 2 and 4 were drilled approximately <br />70 feet (21.3 meters) deep; Test Holes 3 and 6 were drilled 95 to 100 <br />feet (29.0 to 30.5 meters) deep. <br />Two different types of sampling devices (i.e., Modified California <br />Barrel Sampler and a Standard Split Barrel Sampler) were used to <br />retrieve soil and bedrock samples and test in-situ soil and rock <br />engineering parameters. Due to the method of dragline construction, <br />erratic consistencies of the soils were encountered. Some large <br />cobbles and boulders made sampling at selected intervals very difficult. <br />Field samples were highly disturbed and could not be used for quanta- <br />titive and standard shear strength determination by laboratory analysis. <br />Standard Penetration Tests were recorded at sampling intervals during <br />the advancement of each hole. <br />In-situ permeability tests were attempted at selected intervals in <br />test holes using both single and double packer systems in order to <br />determine horizontal field permeabilities. However, due to the <br />-4- <br />