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The alignment, from approximately Sta. 73+00 to its end at Sta. 80+46.01, <br />• is in a cut that deepens southeastward toward what will be the throat of the <br />pit. The bearing of the alignment in this area is N55-67W and the strike of the <br />lower section of the Williams Fork Formation is approximately 4-5. The dip of <br />the rocks is about nine degrees to loo west. The angular intersection of the <br />strike and dip of the rocks and the bearing of the alignment is reasonable <br />assurance that there should be little or no adverse movement of rock into the <br />cut. Consideration should be given to establishing safety berms in the road <br />cuts to protect against stray rocks falling into the roadway. <br />Design and Maintenance. The haul road alignment as it is will be subject <br />to some settling, particularly in the reach between Sta. 63+85 and Sta. 72+00. <br />This probably will result in a greater amount of maintenance for this reach <br />than in other reaches. Since the road will be under daily observation, and <br />since it will be a private thoroughfare, increased post-construction <br />. maintenance should be more acceptable than relocation of the alignment. <br />5.2 Proposed Sedimentation Pond <br />Several possible sites were reviewed for the location of a sedimentation <br />pond. Preferably the site should be close to the mine; however, the close-in <br />choices were either in potentially unstable (Qpug) and unstable ground (Qug). <br />Other sites in more stable materials were not acceptable because of design <br />criteria. <br />The final site selected is shown on Drawing Nos. 9111-4 and 9111-5. <br />Figure 1 is a location map of drill holes in the pond area and Figure 2 is a <br />cross section showing the geology as determined by drill-hole data, and <br />geological inference. <br />The right abutment of the embankment is at about Sta. 38+90, right, and <br />the pond area will extend upstream in 005 Gulch to approximately Sta. 42+30, <br />]5 <br />