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1 � <br /> fl�cmporan unsuppuncd cut slopcs morc than 4 fcct high may be inclincd al I11:1 V maxinunn <br /> stecpness within the e�istine or new fill. Dccper�emporary unsupporled cut slopcs Ihat caicnd imo <br /> ' the fill should be ioclined a� I!!H:l V or�attcr. <br /> Flaner slopes may he neccssary if scepage is prescnt on the cut facc. Somc sloughin� and <br /> ( raveling of the cut slopcs should bc c�pcctcd. Temporary covering ���i�h hcavy plastic shccling <br /> (adequatcly ballasicd)should hc uscJ�o pmtccl thcsc slopcs during periods of rainfall. <br /> I 4.2.8 Permanent Slopes <br /> VVe recomtnend thal miy pernianent fill slo�xs be crnistrucicd no s�ecper than _'Ii:IV. To <br /> achic��e unifortn crnnpaction. ��c rccommcnd that fill slopcs bc ovcrbuilt slighdy and subscyucntly <br /> � cut back to expose�vell compacted fill. <br /> To achieve Ihe design pad grade, Ihe soud�cast comer of the property will require a cut of <br /> r appro�imately 16 teet. To mak: Ihis cut, thc slope soutli of the sile will havc to be cut back and <br /> Itlattened. We recommend tl�at the slope adjacent to the south side of the propeny be cut such that it <br /> is not steeper than 2H:1 V am�vhcre on the slope. In addition, the slope should he providcd with <br /> fbenches eveq�30 fect venical to prevent excessive crosion and rilling of the slope due to sheet ilrnv <br /> � runof'C Pertnanent surface water collection ditches should be constructcd on the benches+u collcct <br /> � �cater and direct it to suitable discharge points. 71ie benche� should be a minimmn of 5 feet wide. <br /> A surface �valer collection ditch should also be conswcted along the base of the slope to prcvent <br /> surface water from impactine die future pavements. <br /> � To minimize erosion, nc��k constructed slopes should be planted or hydroseeded shortly aflcr <br /> completion of grading. We recotnmend that the slope south of the site be covered with an crosion <br /> I control blanket such as Curle� I or 5150 to help establish vegetation and minimize erosion on this <br /> large slope (see Section 4.5. Erosioo and Sedimentation Control). Until the vegetation is <br /> established, some sloughing and raveling of the slopes should be expected. Localized repair; and <br /> � rcvegetation may be necessan in areas ��here sloughing and raveling occurs Heavy straw rnulch <br /> could be used ro protect ihe slopes during periods of rainfall and during the wei season. <br /> � 4.2.9 Utility Trenches <br /> Trench excaea[ion, pipe bedding, and trench backGlling should be completed using the City of <br /> r Gvcrett Standard Details. <br /> IUtility pipes should be bedded in sand and/or smooth rounded gravel. Additionally, wc <br /> recommend that the pipe be covcred w�ith bedding mater.al to at leazt one foot above the pipe. This <br /> � bedding material should be lichtly tamped into place. Dackfill placed above the bedding material <br /> shall consist of swctural fill quality material as discussed above. <br /> I Utility trench backfill can be placed in lifts of 12 inches or less(loose tliickness)below a deptli <br /> of 5 feet from rnish grade. Within 5 fee[ of fini,h grade, backfiil should be placed in lifts of <br /> 8 inches or Icss(loose thickness)sucii that adequate compaction can be achieved throughout the lift. <br /> IEach lift must be compacted prior to placing the subsequent lift. Utility trench backfill should bc <br /> compacted to at least 90 percent MDD below 2 fec: o}'subgrade, while the upper 2 feet should be <br /> 1 <br /> iG c o G n g i n e e r s ]� Pile No. 75gq-002•00-I 1301050101 ��F <br />