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<br />erl <br /> <br />.,,- <br />\ ) <br /> <br />o Seismotectonic conditions at the site including seismic <br /> <br />considerations frOnt earthquakes on faults identified as "potentially <br /> <br />active" by the Colorado Geologic Survey and from unassociated <br /> <br />earthquakes. <br /> <br />o Geological conditions along the penstock route will be investigated <br /> <br />with respect to slope stability and foundations support characteristics <br /> <br />to have a better assessment of penstock installation alternatives <br /> <br />requirements. <br /> <br />Ell.l.2 Reoorts - Collect and review pertinent readily available reports and <br /> <br />information regarding the I~eological conditions in the vicinity of the site. <br /> <br />This information may include aerial photographs, unpublished and published <br /> <br />geologic mapping, data and reports from the U.s. Geological Survey, <br /> <br />Colorado Geological Surv',y, NOAA Earthquake Data Center, and U.s. <br /> <br />Bureau of Reclamation. <br /> <br />Ell.13 Field Investil!ation - Conduct field reconnaissance and surficial geology <br /> <br />mapping. Key geologic con.ditions, including potential penstock alignments, <br /> <br />will be surficialIy examined :rod documented including attitude and character <br /> <br />of major joints, fractures and faults, and surficial expression and distribution <br /> <br />of bedrock and overburden (decomposed granite, colluvium and alluvium). <br /> <br />Existing aerial photography will be utilized to the extent feasible to facilitate <br /> <br />the ground reconn.k<ance and geologic mapping. <br /> <br />26 <br />