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__ _ _ . _ _ _ _ <br /> OCT 13 '89 11�17 WJR PS P.3i3 <br /> � �. <br /> • � DAMES & MOORE APROFF:551UNnLLIAtITF.DPA1CrNERSWF <br /> , <br /> Whiteley ]acobsen & Associates, P.S. <br /> Mey 9, 1989 <br /> Page 2 <br /> A more thorough examinacion of che slope trom positions along tho toe revealed occaslonat <br /> trees leanin¢ from downslope creep, and evidencs of shellow slope failures at three locations <br /> within a quarter mile from the proposed garage. The two clOsest failures,both located within 300 <br /> feet of the site, showed vertical scarps 1 S to 25 feet higf� near the Crest oF the slope. <br /> 1 <br /> � <br /> ; CONCLUSIONS AND RECOMMENDATTONS <br /> lt is the opinion of Dames dc Moore that the D�oposeQ garage will not induce failuro of the <br /> adjacent slope Drovided drainaQe during artd efter construction is properly diverted from the site. <br /> However, there are clear indiCations that the slopes in that erea are experiencln� a mOdCrately <br /> active de�ree of aaturally occurring s�ope instability. The possibility therefore exisp that sueh <br /> instability may occur at the slte in question during the lifetimc of the structuro. If instsbillty <br /> does occur, it is likely to consist of shallow'alabbing"type failures,involving perhaps 3 to 5 feet <br /> thick slabs of soil that drop away from the upDer hatf of the slope. <br /> We thank you for the opportunity co be of eervice on thie proJecc. Please contact us if <br /> 1 quescions thould erise regerding the contents of this reporG <br /> � Youre very truly, <br /> � PATIN MC� DAMES d� MOORE <br /> ' �r�,��i�l{if���dF <br /> .�`:! '�('r•; � r ' <br /> �• �'': Hnr ns L. Chebre, P.E. <br /> * _ °�` Princlpal Engineer/Associete <br /> ��s'�;C�9it��'�•'����,t W� 1rn, Y`na C��-! <br /> 4 s/0���N W, Martin McCabe, Ph.D., P.�. <br /> Project Engineer <br /> HLC:WMM:emw <br /> I <br /> i <br /> I <br /> _ _ _ ___ _ _ . _ _ <br />