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<br />I <br />I <br />I <br />I <br />I <br />.. <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />",. ~^ <br />I <br /> <br />Beaver Reservoir Company <br />Attention: Mr. Neil Thompson <br />February 4, 1993 <br />Page 3 <br /> <br />Preferred seepage paths are believed to exist in the foundation materials due to stratigraphic <br />differences, localized faulting, area1 joint and fracture patterns and a postulated zone or <br />stratum of rubble associated with an altered or burned coal seam in the foundation. <br />Seepage in these features may vary as a function of time due, to the plugging and <br />unplugging of voids with transported material and dissolution of pos~ible soluble strata <br />and/or joint filling materials. <br /> <br />SCOPE OF WORK <br /> <br />The scope of our services for our field and laboratory investigations are outlined in our <br />Proposal No. 92D227P dated June 1992. In general, the scope of our field and laboratory <br />investigations included: ' <br /> <br />· Provide a drill rig ane!" supervise the drilling, sampling, and logging of four <br />test holes. ~-- <br /> <br />. <br /> <br />Perform laboratory tests on selected soil samples recovered from the drilling <br />to assist in .the classification and evaluation of the soil and bedrock. <br /> <br />. <br /> <br />Perform a geophysical survey using the self-potential (sp) technique. <br /> <br />. <br /> <br />Review'existing geologic data, along with data gathered in our investigation, <br />to develop a .geologic model of the dam area. <br /> <br />. <br /> <br />Evaluate the results of our field program in light of the existing conditions <br />at the reservoir. <br /> <br />. <br /> <br />Prepare a data analysis report summarizing our results. <br /> <br />SITE INVESTIGATION <br /> <br />WCC supervised the drilling and sampling of four test holes, WCC-l to WCC-4, on <br />October 6 to 11, 1992. Approximate locations of the test holes are shown on Figure 2. <br /> <br />The test holes were drilled by L.A. Smith drilling under contract to WCC using a truck- <br />mounted rotary drill rig (Deutz KHD Air Diesel). The test holes were advanced using 4 <br />1/4" LD. hollow-stem auger and wire-line coring techniques. Overburden samples were <br />obtained using a 2-inch O.D. split-spoon drive sampler. The sampler was advanced 18- <br /> <br />23067/LEIO 02-04-93(4:24pm)/RPT <br />