Laserfiche WebLink
April 7, 2005 <br /> Mr. Don Lcvin <br /> L&A Job No. SA037 <br /> Pagc 14 <br /> Wc rccommcnd that a laycr of 4-inch-lhick minimum, compacted, crushed rock basc (CRB) of <br /> 7/S-inch-minus cnishcd rock, bc uscd for thc drivcway arca. Thc cnishcd rock base should bc <br /> toppcd with 3-inch-thick Class B asphalt concrctc (AC) or 4-inch concretc pavcmcnt rcinforced <br /> witli a laycr of�vcldcJ wirc fabric at thc mid-depth of thc pavcmcnL Thc drivcway pavcmcnt <br /> should bc graded lo dircct stor�i runoff to flow away from thc adjaccnt stccp slopc into catch <br /> basins installcd in thc drivcway. <br /> DRAINAGE CONTROL <br /> Buildin� Footprinl F,xca��ation <br /> Gxcavation of huilding footprint of thc new residcncc, if cncountcring groimd�aatcr, should havc <br /> thc bottom of excavation sloped anJ ditches excavated along the bases of cut banks to Jirect <br /> growxl�vatcr sccpagc lo Ilo�v into a sump pit from which watcr can bc pumped out of thc pit into <br /> a ncarby stonn inlct. A laycr of 2-inch crushcd rocks should be placcd ovcr firni subgradc soils <br /> undcr footings, as mquircd, to protcct thc soils from Jisturbancc by constniction cquipmcnt and <br /> foot traffic. This crushcd rock hasc should bc Uuilt to a few inchcs abovc ground�vatcr Icvcl, but <br /> not Icss lhcm 4 inchcs thick. Thc crush rock Uasc should bc compactcd in 12-inch lifts to a non- <br /> yiclJing statc ��ilh a ��ihr:rtory mcchanical compactor. <br /> Runnff o�•cr Impcn�ious Surfaces <br /> Stonn nmoff over impervious surlhccs, such as roofs and pavcd arcas, should bc collected Uy <br /> undcrgrounJ drain linc systcros conncctcd to downspouts and by catch basins installcd in pavcd <br /> :�reas. Slomi��:itcr thus collccicd should hc tightlincd to dischargc into a ncarby storni sewcr. <br /> LIU & ASSOCIATES, INC. <br /> II '�. <br /> I � <br />