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Golder Associales Inc. <br />a�n,� �aamn" ��:�: u� <br />Ir„� In��ond. vJn i i;n 4iu �.'..� <br />l�Aophcne (7Dr,) kF.; ,1,'1 / <br />fc�� pi�;.) nrt? 6.I�±r7 <br />�)rccnd�rr 1i, 1�)92 <br />Srlin��iJ��r I I��iurs, Inc. <br />�i510 5uullicenlor lS��ulovanl, Suilc ��(i <br />'lliktvila, 1'1'�ishinglun 9R1l;8 <br />A"I'Il�.N'I'ION_.Mr. Carl_I�I��sti <br />��. d • `yi <br />' h' . <br />' : � �(i�(1Cy' <br />L�1.'sS�Cl�l1.�5 <br />ItP.: SUPPLGtvtI:N'fAI.GGO'if•.CIINICAI.I:Nc;INI�.I:RINC�S'fUf)Y <br />CASI'GR CKIiGK'fOWNI IOL'SIr:S <br />I:VGltl�f'I', WASIIINCTON <br />I1car Carl: <br />C)ur n�L• 9Z1-1 IS-1 <br />CulJcr Associales Inc. is ��Irisrd lo prescnl lliis siipplemenlal gcolcclini��il cnginc��rintt slu�ly <br />for the pro��osed Casper Crrek �lotvnhuuses �,r�jrcl localed in Silvcr I.ake, W;c;liin�;l�ni, as <br />shown un I�igurc l. 6Vc procced��d wilh this invesli�;ation based an yuur ap��ru��,�l ��f our <br />No��ember G, 1992, �?roposal which oullined our scope of worl:. <br />lve completeJ a ��revious geolechnical engineerin�; sludy of �his sile (�r'I'he A�rlrn�l <br />Coin���n�� Inc., �laled Oclobrr 2f3, 1987. 'Ihis previoiis inveslit;;ilion inclu�led Ilir rxc�iv�iliun �,I <br />9 Icsl �,ils. 'Il�c pur�,osc o( Ihc cnrrrnt sludy wns lu lurlhcr explore Ihc soil anJ groundtvolrr <br />condiliuns al Ihc silc by excavalin� a�dition��l Icst �,ils and con(irin our original gculcchnicnl <br />enF;ino��rin� rnnclusions and recommendalions. �Ne also reevalualed fwindalioii allernaliac^; <br />in Ilic aroas of pcal and nun-slruclural fill. Gnviroiunenlal sampling and Icsling of Ihc soil or <br />l;roundw��lu were nul tvilhin thc sco�,e of lliis s1udV. <br />It„nl on Ihc resulls of tliis slud}', �ur original t;ruleclinical engineerit:g conclusions an�l <br />reromniend.itiuns rcmain applic��ble lu Ihe cinrenl �,rojecl schenm anJ Ilie ��r;���ose:l <br />�Ievclopmenl appears to be fc;uil�lc fur Ilic ol�sa���c�l sile condilions. <br />1. SI'1'li 1)fSCltll''f10N <br />� 'I'lic silc is a��proaiinalcly 12 acres in sizc an�l is Iur+ilrJ on Ihc suulh siJc uf 5il��cr I.akc Ron�l <br />UcUvicen 15th Dri��c S.G. and 191h Avenuc S.G (SR-527) in Gveroll� Wa15I1111EjI011. I IIL` SIIC Iti <br />� relalivcly (I,it wilh a ri�lgc tren�lin� nurlh-suiilli alonF; thc wrst c�gc o� thc properly, �\ <br />lucalizrd drainagr cliaiinel irends �rast-wesl across Ihe renlral porliun of Ihe pro��erly ;n�J <br />anolher draiiiage ch:innri Irends norllrsuulli alung Ihc e�sl ��roperly linr. 'I'hcrc arc Ilirc�� <br />� ��rolecled tvelland ;ueas located tvilhin Ihe silr Ilial lolal a��proximalely 2.5 acres, 'Ptvu <br />residential homes currenUy exisl on Ihe properly. Residenli�il de��elopment occupies Ihe <br />adjarcnt �,ru��crlics ��n ihe cnsl an�l �ti�csl siJrs of Ihe silc wilh undc��i�lo�,ed land to Ihc suulli <br />� anJ tiilcrr I..il.� R�,.ul coin�,�isinf; Ilu� m�rllirrn b��unJnr}�. 'fho silc i�; slwwn un I igurc'1.. <br />