5300 GLENWOOD AVE 2018-01-02 MF Import

' I Clenwood Terracc File Numfxr 126994 May 12. 1994 Pagc R CONCLUSIONS ANll RECOAIMENDATIONS General Conditions 77�c fill found on site is not wnsidcral to be structural fill and caution must be taken to properly develop U�e site. 7'he area planned for improvements will rcquire more work than is gcnerally performed for typical Jevclopments. We have provided recommendations to construct the buildings, roadways and de[cntion pond, duc to Uie dcpd�of the fill anJ existing slop�s. Foundations for the pl:uuicd structures should extend to Wc mcdium dense or better soils. VVe cxpcct that the foundalion ty�pcs«�II vary throughout U�e site due to thc depd� of the fill. 'ihe planned buildings may be supporteJ by piles, coirventional basemendreGlining walls,or conventional foundations support by control density fill. Thc most cconomical way to support thc roadwuy w�ould be to rcH•ork Wo upper 3 to 4 fcct as stn�ctural fill :uid accept future settlements of We ground surface due ro ilie existing underlying fill. Surface grades and gradients of gravity ulili[ies would necd to be acccntuatcd to compcnsate Cor Uiese Cuture settlements. Wc would cxpcct that the upper 3 to 4 feet would have to tre rcmovcd and rcplaced as d�e cxisting m�terial would be hard to compact:u structural fill. 'fliis upper fill�vould providc support of die pa��emcnt section and tcnd to smoot6 out We potc��tial futurc diEferenlial sctdcmcnts. The altcrnativc to acccpting the potential setUcments would be ta remove all of ilie fill under O�e road�cays nnd repince it with stniclural fill. We do not exprct Uiat option to be cconomically viable. lhe dctention pond should bc lina! wiUi n less pcnneable fill soil to reduce �vatcr intiltration into U�e surrounding soils. An altcmative would bc ro usc a s�md�etic lincr. Thc pond should be constructed by stripping otPof tLc existing fill do«�� to native benring soils in tlic are� oE tlie pl.vuicd bcrms. 'Ilic bcrtns should then be constructccl wilh a suitablc matcrial by wmpacting lo Q�c appropriate density. 11ie pond slope ;mglcs vid constniclion mcdiod should bc per}'omicd as outline in Qie Detenlion Pond subsection of Uiis rcport. Tlie c�isting drains, locatcd at thc bottom of the cut slope, should bc dug up to find out what they are (surfacc or subsurface drain) and if thcy arc «�orking. Upon ob4�ining d�is information, the use oF die av�ti g sxL^zt tlu.n.ui nf a�l.iiticnal drairs� or a mmbin�tic�n c�('b�o:h cxwld!�e e�aluatzi II�e c�Ci� drains do not function property, cut-otT'drains may be requircd along the south side of d�c roadway to protcct thc ncar surCuce subgradc soils. 71u locations :uid nccd for cut-o[f drains in cxcavation and roadway areas for constructimi sl�ould be cvaluated just prior to sWrting cartliwork. Cutoff drai�u most likcly ��II be nccessary along the toc of the cut slopes on the south side of the property. Development of tlic sitc wilhout cut-off trenchcs should only be altcmptal if site gradcs are raised or if it can be shown lhat NELSON-COUVRETTE& ASSOCIATES, INC. FFl3-23-�1946 1?_�f�5 2k36 481 2510 %i P. 10