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i~ <br />original design in light o! changes in aan6truction practice and the inaitu <br />dlensitiee. 1 <br />a.o sruusax~c <br />No additiaial ar~delirig or stability analysis has been oa+plated as part o! this <br />igatim. It is our tu~derstandi~ that o! poncern is the pertormanoa of ttw <br />1l7e pota~tial effects of the'stretification or layerix~ Granted by the warrant <br />tim prectioes has alznady been briefly discussed in the earlier section. <br />this layering ®n also effect the shape and location of critical failure planes. <br />powdyar, ainoa the layers are essPJrtj~~ly horizontal, the effects m shape and <br />lexatlan of failure planes would teM to ia~urove stability rather than detract <br />fx+cm it. Crte potentia]. concern whidt has rot been addressed by this <br />irnnastirgatim involves the possible affects oP the stratification as the <br />miepaticn of '.later thrax~t the refuse piles and the devalgaaent of piezateetric <br />p~al~7a. <br />~~• <br />Zlra s+elattionnhiP between density arti shear sttrryth has been discuueed in the <br />earlier siection. 4he original design was based ~ an effective stress friction <br />angle o! 75•. Ih the earlier sectim, w~a have d~~**++~+~+ that !or the omditians <br />d~serrsd irf this pile, the probability that the in place density would equal or <br />®meed the 52.1 pcf required to provide a frictim angle of 7S• is appxLOdmately <br />91.8=. 1-11 else being equal, this iaplies that there exists a 91.8 probability <br />ttkxt the pPy-Lorseara oL the pile will ac~tal or exceed that anticipntik! by the <br />Fatally, thes+a's been sane interest e~resaed in imeasing the heic~t o! the <br />rsfa9a pile at a®e locations to the full maadmna design heigkst of 75 feat an~/ar <br />enttendin9 the pile laterally, ageia usirq the maxlntan design pile height of 75 <br />last, Trtrxaasing tho heic~t of the ntiating pile up to as taxh as 75 fat at s11 <br />ltxxticna, pr~tts ro obvious otx~c+erna so lemg as good surface and subsaxfaoe <br />dbainaga can be maintained at all ltxxtions. similarly, attending the pile at a <br />tlesicgt heic~st o! 7S feat, ahauld pmt no oa'loertty as long as mow again good <br />sRSfaae and subsuxtace drainage can ba t~eintained ar~d so long as faatiintian <br />ooeditiorts in the area of the attertsicn meat ar exceed the strength <br />d~nractaristicc of the foLUxiation of the exiatirg refuse pile. <br />