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In the truck areas of the parking lots; all the above is the same only have <br />the asphalt be 5 inches N.A. <br />Beneath the bus parking and travelling areas; the original design does not <br />change except the entire 12 inches of crushed rock should be base course. <br />Lateral Loading from Poles <br />Based on the strength characteristics of the soil beneath the upper 18 to 24 inch layer, it is <br />recommended that the lowest strength soil in the WSDOT system be used for designing <br />the light poles. This is the 1000 psf approach. <br />Flower Bed Drainage <br />I3oth subsurface data and the onsite observations (see photo #3 in Appendix A) indicate <br />that the drainage downward is very low. Therefore, we recommend that the drains be <br />installed in the base of the large flowerbed areas. <br />Bridge Fill/Downdra * It, ssue <br />We understand that the new earth fill will be 10 feet in height, approximately 50 feet in <br />width and it shall be placed approximately 10 feet laterally from an existing pipeline. <br />This amount of fill creates a downward loading at its base of approximately 1200 pounds <br />per square foot. According to the Westergaard/Boussinesq stress distribution analysis, <br />approximately 50% of the. vertical load will influence the soil around the adjacent pipe. <br />'File loading, when compared to the consolidation curves should result in approximately <br />1.2 inches of settlement in the soils at the pipe. The resulting settlement should be an <br />even curve with the maximum amount at the point where the fill is the highest. <br />As shown in Appendix D, the pore pressure dissipation test does indicate that the pore <br />pressures do decline in a relatively short period of time. As a result, the settlement from <br />the bridge fill placement should take place in a week or two and then be stable. If the <br />placement or installation of the pipeline could be delayed till after the settlement has <br />occurred, then only minor settlement would occur in the pipeline. <br />Closure <br />We have also sent two copies of the report to Inca Engineers in Bellevue. <br />We appreciate this opportunity to be of service to you and would be please to discuss the <br />contents of this report or other aspects of the project with you at your convenience. <br />Milbor-Pita & Associates, Inc, <br />Frank Pita, P.E., P.G. <br />Geotechnical Project Manager <br />Gooleclmical, Tunnel and Environmental Engineers <br />3080 12S°i Aee NE 1'Lone (425) 869-5778 <br />Bellevue, WA 98005 Pop 4 Fax (425) 861-0677 <br />