Laserfiche WebLink
2.2.2 Conclusions Regarding Haul Roads <br /> • <br />a) Water from intense or prolonged rainfall and snowmelt <br />should not cause problems with the facilities planned provided <br />structures are designed and constructed to move the water away from <br />cuts and fills and into natural drainage courses as quickly as <br />possible without increasing erosion. <br />b) Slopes cut in shale bedrock and (or) weathered shale and <br />colluvium, primarily in the first three miles of the alignment, can <br />be steepened beyond the regulatory 1.5:1 maximum, if needed and <br />permitted. This will reduce cut areas exposed to weathering, thus <br />increasing stability. The 0.25:1 limit in bedrock probably can <br />only be approached in the southern one-mile reach, but the steepest <br />slopes should not exceed 0.75:1 until cuts are opened during <br />construction and the potential effects of jointing on stability can • <br />be determined. <br />c) Sandstone and shale bedrock in the last 1.5 miles of the <br />haul-road strike and dip favorably to the alignment. In the field <br />examination bedrock exposures were too restricted to make <br />meaningful evaluations of rock joints. <br />2.2.3 Conclusions Regarding Sedimentation Pond 010 <br />a) Final location of the embankment for the pond was made <br />after test drilling. Limited test-hole data (TH-23) are available <br />to within 100 feet of the embankment centerline; no test holes were <br />drilled along the centerline. <br />b) Data projected from test holes, and from surface geologic <br />information indicate that neither abutment likely will be developed • <br />in unweathered bedrock. Both abutments are in Alluvium on the <br />8 <br />