Laserfiche WebLink
SHANNON ~VNtLSON, INC. <br /> <br />However, because the difference is generally small, we used the raw MC blow-counts to classify <br />the relative density and consistency/stiffness. <br />The borings were observed by a geologist from S&W who collected soiUrock samples and <br />prepared field logs of the borings. All samples from the MC sampler were taken to our <br />laboratory. Visual classification of the samples was based on the classification systems shown in <br />Appendix A for soil and rock (Figures A-1 and A-2, respectively). Individual boring logs are <br />presented in Appendix A (Figures A-3 and A-4). These exploration logs represent our <br />interpretation of the contents of the field logs and the results of laboratory testing. <br />Upon completion of drilling and sampling, groundwater levels were measured, and the boreholes <br />were backfilled with cuttings generated during the drilling process. Groundwater measurements <br />made during drilling are recorded on the individual boring logs in Appendix A and discussed <br />further in Section 5.0 of this report. <br />Geotechnical laboratory tests were performed on selected samples retrieved from the borings to <br />determine index and engineering properties of the materials encountered beneath the site. <br />• Laboratory testing included: <br />1. Natural moisture content and density; <br />2. Grain size distribution; <br />3. Atterberg limits; and <br />4. Direct shear tests. <br />The laboratory test results are presented in Appendix B. The natural water contents, Atterberg <br />limits, and percent fines are also indicated on the individual boring logs in Appendix A. Soil <br />properties and strength values are discussed in more detail in the following sections. <br />5.0 GEOLOGIC CONDITIONS <br />Geologic conditions were interpreted from review of previous studies, review of geologic maps, <br />previous visual observations in mine pits, and the current borings. A structure map indicating <br />the floor elevations of the G8 coal seam provided additional information. <br />Bedrock at the mine site consists of interbedded sandstone, siltstone, claystone, shale, and coal of <br />the Williams Fork Formation. In the project area, the floor of the G8 coal seam dips down at <br />about 6 degrees towards the northeast. <br /> <br />23-1-01105-200-Rl.doc 23-1-01105-200 <br />4 <br />