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1 <br />distortion caused by the arcuate failure in the area, then the dips could impact the overlying <br />1~ <br />The existing faults are not considered to be active and their present state does not <br />appear to present a hazard. A potential exists for development of flooding and debris flows <br />]• in the erosional re-entrants. The talus slope has a potential for downslope creep and minor <br />soil failures. These hazards are minor and are not considered to be a potential hazard to the <br />road. <br />rocks. Additional geologic mapping might be done in this area to clearly define the nature <br />and origin of these anomalous dips. <br />A talus sloce exists at the base of the sandstone cliff. Blocks of sandstone, erosion <br />and old debris flows, all appear in the talus slope. In addition, several different types of <br />rock failures have been observed in the cliff at the site. <br />1 <br />3.3.1 Potential Hazards <br />Rock falls of several different types constitute the major hazard. Any increase in <br />1 pore water pressure will increase the potential for these rock failures. <br />3.4 Faults <br />1 Subparallel northwest-striking lineaments were interpreted from aerial photographs <br />(Figure 3). These lineaments may be interpreted as faults or zones of more intensive <br />fracturing. These zones define boundaries between large volumes of rock that appear to have <br />internally consistent engineering geologic properties. Fach large volume of rock is divided <br />into smaller volumes for purposes of describing the hazards. A wide zone shown on the map <br />(Hazard Zone Sc, Figure 3) is described in this report as a possible fault zone, which we <br />have informally named the Deer Trail zone. <br />,• 7 <br />