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<br />. <br /> <br />. <br /> <br />8 <br /> <br />Borrow Area Borings--We anticipate drilling approximately 10 <br />holes to investigate potential sources of borrow materials for <br />dam rehabilitation construction. Potential borrow sources will <br />be identified during the field investigation program, hut may <br />include an area east-southeast of the existing emergency <br />spillway. This area appears to have been previously used as a <br />borrow source, possibly to raise the embankment over 20 years <br />ago. The final number and total depth of holes to be used for <br />the borrow investigation will be determined in the field. We <br />have estimated spending 2 days exploring for borrow materials. <br /> <br />3.1.2 Geologic ~apping <br /> <br />An important ~rt of the field investigation will be the detailed <br />geologic mapping in the area near the darn and reservoir. The <br />mapping will be performed to assist in the geologic evaluation of <br />the area (see Section 3.3). Special attention will be given to <br />the mapping of the geology near the dam and to locating any <br />potentially unstable slopes near the perimeter of the reservoir. <br /> <br />3.1.3 Surveying <br /> <br />Field surveying will be performed by Greenhorne and O'Mara to <br />locate all drill holes and verify the topographic conditions of <br />the dam and reservoir area. In addition, the surveying crew will <br />cross section the stream channel downstream from the dam to <br />assist in the dam break analysis and spillway design (see <br />Section 3.4). <br /> <br />3.2 Laboratory Testing <br /> <br />Upon completion of the borehole investigation program, testing of <br />the preserved samples obtained from drilling will be performed in <br />