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The topography of the site is variable and generally slopes down to the proposed pond location from • <br />the north-northwest. The natural valley basin slopes gently to strongly towards the eazt. The site is <br />situated on the north side of a drainage which flows from the northeast to southwest. The adjacent <br />hills slopes moderate steep to steep towards the natural drainage valley. <br />The site is vegetated with natural grasses and weeds, scrub oak and sage brush. <br />FIELD INVESTIGATIONS <br />The dr'llling portion of the subsurface investigation was completed from November 19 to November 22, <br />1991. For this project, sixteen (16) test holes were drilled at the locations provided by Amuedo and <br />Ivey, inc. and field located by Peabody Coal Company. Test holes A through F were advanced along <br />the alignment of the proposed dam embankment. Test holes G through L were advanced near the <br />vicinity of the proposed dam with test holes M through Q advanced along the alignment of the <br />proposed haul road. Logs of the test holes are shown in Figures 1 through 3 with the legend shown on <br />Figure 4. A site plan indicating test hole locations as prepared by Amuedo and Ivey, Inc. is shown in <br />Appendix A. <br />The test holes were advanced through the overburden soils and underlying bedrock with CME 45 (rack <br />mounted drill rig utiliting 4-inch diameter continuous (light augers. The test holes were logged by <br />representatives of Ground Engineering Consultants, Inc. <br />Samples of the subsurface materials were taken with 2-inch [.D. California liner samplers. The <br />sampler was driven into the various strata with blows from a 140-pound hammer falling 30 inches. Tlus <br />test is similar to the standard penetration test described by ASTM Melltod D-1586. Penetration <br />resistance values, when properly evaluated, indicate the relative density or consistency of the soils. <br />Depths at which the samples were taken and the penetration resistance values are shown in the logs of <br />test holes. <br />Measurements of the water level were made in the test holes by lowering a weighted tape into the open <br />hole shortly after completion of drilling and within 3 days after drilling. The location of the water <br />levels measured are shown on the logs of test holes. <br />LABORATORY INVESTIGATION <br />The laboratory investigation was conducted to study the engineering characteristics of the materials <br />obtained in the test holes. Tltis section includes a discussion of the laboratory test procedures, figures <br />and tables presenting the actual lest results. <br />Job No. 91-562 Ground Lnginttring Consullan~s, Inc. Page 2 <br />