Laserfiche WebLink
M98168GE • • <br />It is difficult to predict if unexpected subsurface conditions <br />will be encountered during construction. Since such conditions may <br />be found, we suggest that the owner and the contractor make provi- <br />sions in their budget and construction schedule to accommodate <br />unexpected subsurface conditions. <br />3.0 ON-SITE DEVELOPMENT CONSIDERATIONS <br />We anticipate that the subsurface water elevation may fluctuate <br />with seasonal and other varying conditions. Excavations may <br />encounter subsurface water and soils that tend to cave or yield. <br />We anticipate that fractured layers may exist in the formational <br />material and that the fractured layers may carry or store water. <br />If water is encountered it may be necessary to dewater construction <br />excavations to provide more suitable working conditions. <br />Excavations should be well braced or eloped to prevent wall col- <br />lapse. Federal, state and local safety codes should be observed. <br />The site construction surface should be graded to drain surface <br />water away from the site excavations. Surface water should not be <br />allowed to a:cumulate in excavations during construction. Accumul- <br />ated water could negatively influence the site soil conditions. <br />Construction surface drainage should include swalea, if necessary <br />to divert surface water away from the construction excavations. <br />Organic soil materials were encountered in the test borings. The <br />organ;.c soil materials are not suitable for support of the struc- <br />ture or structural components. The organic soil materials should <br />be removed prior to foundation construction. <br />The formational material encountered in the test borings was very <br />hard. We anticipate that it may be possible to excavate this <br />material; however, additional effort may be necessary. We do not <br />recommend blasting to aid in excavation of the material. Blasting <br />may fracture the formational material which will reduce the support <br />characteristic integrity of the formational material. <br />4.0 EXCAVATION CUT AND PLACED FILL SLOPE CONSIDERATIONS <br />The stability of any elope is dependent on many factors. Typi- <br />cally the stability of a elope is analyzed by calculating the <br />anticipated gravitational forces that tend to drive the mass of <br />soil downhill and the anticipated internal strength of the soil <br />along Che expected plane of failure that will resist the downhill <br />movements. If the driving forces are equal to or greater than the <br />4 <br />~tam6err anD ~,s,~ociatea <br />COMtVL11MO OEOTECNNK~L ENO~NIETq •MO <br />Y~TEN~L fE0TIN0 <br />