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<br />• - 21 - <br /> <br /> bedrocJc formation in the area :.s generally flat lying. Stability of <br /> the excavation cut face into the formation will depend mainly on the <br /> joint pattern. An excavated slope of 3/4:1 (horizontal to vertical) <br />' can be assumed but should be evaluated by an engineering geologist at <br /> lure of excavation. A bench at top of bedrock and flattening of the <br />' overburden soils to about 1 <br />5 <br />1 ma <br />lso b <br />r <br />ired <br /> . <br />: <br />y a <br />. <br />e <br />equ <br />' <br /> RAIL1mAD SPUR <br />' An approxurete 3/4 mile railroad spur is proposed along the <br /> north bank of the river to secvico the future loadout facility. tae <br /> understand that realignment of the river and new highway construction <br /> is also proposed along this section of river. <br /> C <br />id <br />bl <br />i <br />di <br />i <br />i <br />i <br /> ons <br />era <br />e s <br />te gra <br />ng <br />s ant <br />pated to achieve design grade <br />c <br /> levels. Some cutting in the upper mlluvial soils at the west end and <br /> filling of the river bank to approximate 20-foot depth immediately <br />' east of the loadout is anticipated. Considering the subsoil mndi- <br /> lions encountered at the exploratory holes, slopes of 1 1/2:1 (hori- <br /> zontal to vertical) should be stable provided the slope faces are <br /> adequately protected and maintained. Some raveling of cut slopes and <br /> i <br />i <br /> per <br />od <br />c cleanup should be anticipated. The following procedure is <br />' recocrtrended for site grading along the proposed alignment: <br /> 1. Strip and rerrove all vegetation, debris and any loose soil <br />' from below the enbanlarent area. Lnose debris on the existing <br /> river bank should alai be removed as required. <br />' 2. Medium stiff to soft clays and high water table Nere encoun- <br /> tered at hole L-4. Traffic in this area arcs in any other <br /> <br /> <br />