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20 00 11 = �Ba GEO�H COnSULTRnTS, 1nL. I�� E. 7�7-8561 �• 2 <br /> v <br /> � AXisd Conatroction AssociNas JN pB353 <br /> Marah Z0.2000 Pap�2 <br /> Th� propos�d construction should not have adv�ne efi�cts on the stabiiNy of the sbep slope, and <br /> wiN acfually improve the alopa's atabilNy. By romovinp much of th� existlnp (dl tAal is bcateq In, <br /> and w�st ot, the propo�d hous�,the poMntisl tor larpo-sc�le slope mowmsnt wiA b� dramatically <br /> r�dueed. In order to have th� msxrnum sbp� stabilizing b�netit, the sna west oi tM hous� will <br /> bs rbp�d alightly ao th�t moro ot the existinp fip is remov3tl. AdtlrtionAly, tIN toundatan dains <br /> and free-draininp baektill thN will be inst�lbd alonp th�outsid�of th�ba�ert»nt wap� will interc�pl <br /> any sh�llow groundwater thot rn�y Ibw towatd th� face of the sbpe. This thould al�o snw to <br /> Improve s1up�stabfliry. <br /> Attach�d to this lett�r is a typital croes-s�ctbn showinp Me •xistlny condition and th� propowd <br /> final topopnphy. This cross•s�ction is bas�d on ground wAac� Nsvatqnt that you ncenty <br /> dttemiirNd youiseli. <br /> Th� proposed worlc should not heve adverso impacts to ths surroundinp prop�rtiss, if it is <br /> complebd in aceo►dana with our recommendatbns. M tact, the conditions on tM Nro rdlWninp <br /> lots m�y odu�Ny be improv�d wrr�what. By removmp the ma�oM�r Of ttw fiN from the c►yt of th� <br /> sbp�, the Iik�Hhood of lary� slope failur�t In fhe future b reduced. Thb is trus ev�n ne�r the <br /> prop�rty boundari�s, wMr�a Isndslide starting on the site could exlend onto tha adjnlninp bri. <br /> Prwr to startiny the excavation, a slout debris f�neo should b� er�ct�d on tlN �lop� Inrn�dl�tely <br /> MNN of whert the exCSVation wiA dAyllpht to the sbpa. Th� purpow of thb feno� b lo prrvant <br /> larpe amounb of wil irom Wmblinp onto the sbp� duriny t1w ekarinp and �xuv�tion. No <br /> veyNadon should b� diaturbed bsyond thi� construcdon fence. On� possibls m�thod tor <br /> con�buqinp such a debris barriar would M to inst�N rr»td tenc� posts at appfoxfrtiab Mtoot <br /> spadnp, wRh plywootl or NmDen spanninp belwNn Me posts. tt will be n�auary to uw �n <br /> oxcavalo►to puA th� soil baek from the sbpr a bulldozw should not bo wed (or tha sctivky. TM <br /> cl��rinp snd exaav�Uon �hou13 not ocwr durinp Ml�t w�ather, m ordK to redua th� potential tor <br /> sipnNicant eroaon problem�. A rodced constructlon acc�ss ro�d should be�xt�ntlW iMo tM �Its <br /> irom Alwrson Boulevsrd. All truekr should b� nquind to atay on this acqss rosd, to limlt the <br /> amoum of wll carrled oM-sit� by th� truck Uns. Durinp w�t woathw, a11 cut sbpss and �oil <br /> •tockpiNs ahould be covered wNh pla�tic for �roawn Control. T�mporary eut sbph ahould b� <br /> mada u;• steeper than 1:1 (Horizontpl:Verticap. <br /> �t is possibb tAat dense, native soils may not bo exposed at the watem �dpe of the hou�e <br /> exCavati0n. To account tor this, vw racomrn��d th�t ths shuctural plans contaln • O�t�U to <br /> conatruq the weatern foundation wall as a rotaining waA that extends from the tlab down lo denN <br /> soiis. We anticiPate that this wan coub bs at wast 5 reet tau in the southwesum comar ot th� <br /> hous�. Thia wall wfll aerve to protetl lhr atruGuq from dirtlig6 111 tho �V0�11 thqt 80mf Wtufi t0� <br /> movement occurs In any loose fill remaininp wost of the house. <br /> Watw from tlr�lnc and dow�spoub will eithe� be discharped to tho ba�e ot the stNp dop�, or it <br /> wiA bo pumped up to the combination sawer bc�ted in Alverson BouMvard. EitMer option is <br /> accqpteble, but tunnlnp an ebove-qround plpe to fhe basp of M� abp� will lik�ly rpulro �n <br /> easement irzm the neighboring propeAy ownor. <br /> We anticipate thal an �npine�r from our firm will be proaent at lha �ime of �xCavaUon to addnst <br /> any unanticipated site condiUons that may be exposed. <br /> F <br />