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<br />, <br /> <br />~ <br /> <br />~ <br /> <br />not necessary. Spl it-spoon sampl es from the Standard Penetration <br />Tests were obtained at ten-foot intervals along with grab samples from <br />drill cuttings. The two embankment holes were completed using 4~inch <br />diameter solid stem augers. <br /> <br />~ <br /> <br />"III <br /> <br />The abutment hole was completed by advancing 8-inch diameter <br />hollow~stem augers as casing to the soil bedrock contact, followed by <br />conti nuous NX-size rock cori ng to maximum depth. Rock permeabil ity <br />tests with a single inflatable packer were completed in the depth <br />interval below the soil/rock contact. <br /> <br />~ <br /> <br />"II <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 />Upon completion of drilling, selected samples were taken to a <br />testi n9 1 aboratory for anal yses. Laboratory testi ng consi sted of <br />classification, sieve analys~s, and soil permeability tests. <br />Laboratory testing results are ~ummarized in Appendix D. <br /> <br />c. Geophys i ca 1 <br /> <br />The geophysical program W~s conducted simultaneously with the <br />drilling to derive maximum ground truth for the geophysical data by <br />comparison to drilling data. Geophysical investigations were con- <br />ducted by Cl ark Davenport of Davenport/Hadl ey, assi sted by Jim Graham <br />of Monte Vista, Colorado. <br /> <br />The self-potential (SP) and electromagnetic (EM) surveys were <br />completed to assist in identifying seepage paths through the right <br />abutment area. Ground-penetrati ng radar (GPR) surveys were done to <br /> <br />V - 5 <br />