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, <br /> TABLE OF CONTENTS <br /> Paye No. <br /> EXGCUTIVESUMMARY........................................................................................................................ES-1 <br /> INTRODUCTION...........................................................................................................................................1 <br /> FROJECTDESCRIPTION..................................................................................................................1 <br /> PURPOSEAND SCOPE ....................................................................................................................1 <br /> Ci�CKGROUND ............................................................................................................................................2 <br /> PRL=VIOUS EARTHWORK.................................................................................................................2 <br /> P�1ass Earthwork in 2000 and 2001............................................................................................2 <br /> FormerMined Pit Highwall........................................................................................................2 <br /> �-ldtional Earthwork..................................................................................................................2 <br /> 3crings by ENSR Corporetion...................................................................................................2 <br /> SITG ��UP1Lil IIONS................................................................................... ..._...............................................3 <br /> EXISiING SURFACE CONDITIONS..................................................................................................3 <br /> SITEGEOLOGY.......................................................................................................... ......................3 <br /> SUBSURFACECONDITIONS............................................................................................................4 <br /> Subsur(ace Soils....................... ................................................................................................4 <br /> Gra u n d wa t e r..............................................................................................................................4 <br /> CONCLUSIONS AND REC�'�i�iMFNDATIONS.............................................................................................5 <br /> EARTHQUAKE ENGINEERING.........................................................................................................5 <br /> EARTtiWOFCK.....................................................................................................................................5 <br /> Clearicg and Site Praparation...................................................................................................5 <br /> SubgredePreparation............................................................................................................ ..6 <br /> IWorkin,7 Pad............................................................................................................ .................6 <br /> SlrucfuralFill..............................................................................................................................7 <br /> ( Permanen;Cut and Fill Slopes..................................................................................................9 <br /> UtilityTrenches........................................................................................................................10 <br /> Sedimenlation and Erosion Control.........................................................................................10 <br /> � >CCAVATIONS....................................................... .........................................................................10 <br /> !'OUNDATIONS................................................................................................................................11 <br /> FoundalionDesign ..................................................................................................................11 <br /> _, Foundation Settlement............................................................................................................11 <br /> Construction Consideratians...................................................................................................12 <br /> LateralResislance...................................................................................................................12 <br /> FootingDrains.........................................................................................................................12 <br /> EI.OW-GRADE WALLS AND RETAINING WALLS .......................................................................12 <br /> DesignParameters..................................................................................................................12 <br /> WallDrainage..........................................................................................................................13 <br /> OtherConsiderations...............................................................................................................13 <br /> SLAB-ON-GRADE FLOOR...............................................................................................................13 <br /> SubgradePreparation.............................................................................................................13 <br /> DesignParameters..................................................................................................................13 <br /> � ; ,\VEMENT SUBGRADE PREPARATION......................................................................................14 <br /> I?AINAGE CONSIDERATIONS......................................................................................................14 <br /> LCOMMENOED ADDITIONAL GEOTECHNICAL SERVICES......................................................14 <br /> Fi(e�Yn. l?0/tl�001-00 1'�$�I �]EOENGINEEIIS� <br /> IilIIL'J/l':S.�I��IS <br />