Laserfiche WebLink
Ralston Quarry Slope Stability <br /> Settlements Settlements will occur in newly filled ground, typically on the order of 2 <br /> percent of the fill depth. If fill placement is performed properly, in GROUND's <br /> experience the majority of settlement likely will take place during earthwork construction. <br /> EXCAVATION CONSIDERATIONS <br /> Excavation Difficulty Test holes for the subsurface exploration were advanced to the <br /> depths indicated on the test hole logs by means of conventional, truck-mounted, <br /> geotechnical drilling equipment. Therefore, in general, we anticipate no unusual <br /> excavation difficulties in these materials, in general, for the proposed construction with <br /> conventional, heavy duty, excavating equipment. <br /> However, refusal was encountered locally in the on-slope tailings. The contractor should <br /> anticipate encountering coarse cobble- and boulder-sized fragments of rock within the <br /> tailings that may require extra effort or specialized equipment to excavate, handle and <br /> process. <br /> Likewise excavations that are extended into the shale bedrock generally will encounter <br /> increasingly difficult excavation conditions with depth. <br /> Temporary Excavations and Personnel Safety Excavations in which personnel will <br /> be working must comply with all applicable OSHA Standards and Regulations, <br /> particularly CFR 29 Part 1926, OSHA Standards-Excavations, adopted March 5, 1990. <br /> The contractor's "responsible person" should evaluate the soil exposed in the <br /> excavations as part of the contractor's safety procedures. GROUND has provided the <br /> information in this report solely as a service to Asphalt Paving Company and is not <br /> assuming responsibility for construction site safety or the construction activities. <br /> Groundwater and Surface Water Groundwater was encountered during subsurface <br /> exploration at various depths and elevations. Locally, groundwater was measured to be <br /> as shallow as about 11 feet below existing grade. Therefore, groundwater likely will be <br /> encountered in project excavations. Temporary drainage measures will benefit project <br /> earthwork. <br /> Job No. 18-3046 GROUND Engineering Consultants, Inc. Page 27 <br />