Laserfiche WebLink
M98168GE • . <br />MAXIMUM SLOPE INCLINATION <br />SLOPE HEIGHT Undisturbed Formational Material <br />(FEET) (HORIZONTAL TO VERTICAL) <br />0 to 10 1-1/2 to 1* <br />10 to 15 1-3/4 to 1* <br />15 to 20 2 to 1* <br />* This inclination is based on an assumption that the <br />formational material is not jointed, fractured, or laminated. <br />Joints, fractures, or lamination may reduce the strength of <br />formational material in excavation cut slopes. We should be <br />contacted to observe the material exposed in the excavation cut <br />slopes during construction to verify the assumptions made during <br />our analysis. <br />The geotechnical engineering discipline considers a factor of <br />safety of 1.5 against slope failure as the minimum recommended <br />factor of safety. Slopes with lower factor of safety may have <br />sig.ificant long term maintenance costa associated with them. <br />Any cut or fill slopes higher than twenty (20) feet should be <br />analyzed on a site specific basis. Surface water should not be <br />allowed to cascade over the face of any cut or fill elopes. Cut <br />and fill elopes should be constructed with surface diversion <br />ditches at the top and possibly also at the mid slope to intercept <br />surface water and divert it off of and away from the slopes. The <br />surface drain ditch concept is presented on Figure 5. <br />The face of the slope should be tailored to promote rapid runoff <br />of surface water. Surface water should not be allowed to pond or <br />puddle on the face of or in the vicinity of any slope. Slopes <br />faces should be protected from erosion by vegetation or other <br />appropriate erosion protection methods. <br />5.0 FOUNDATION RECOMMENDATIONS <br />Geotechnical engineering considerations which influence the <br />foundation design and construction recommendations presented below <br />are discussed in Appendix C. <br />we have analyzed drilled piers and spread footings ae potential <br />foundation systems for the proposed structure. These are discussed <br />below. we are available to discuss other foundation types. <br />7 <br />Lambert ana ~,aoociate,~ <br />COMNIlTIMO OlOTlCMMICIIL lMOIX!!1O HMO <br />~~f1111~1 f[lTMO <br />