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,5,�.. <br /> . . . . : ' . . . �� . ::��.e��:. <br /> • - .. .,. '`�' • ..�.. _•-•.__... <br /> SHANNON F�WILSON INC 'F�""� <br /> N.l'JriMqJ <br /> �"' � ■ CRI113�NY.� <br /> ,� � UEOTCt7HN1CAL ANO INVICONtAEL1TA! f:0�IS11LTANTS n1R:lna+�dil• <br /> sn�rii wu�s <br /> BCGiJN <br /> 1^•� 1 <br /> Ma�h 18, 1994 ��L:,�y s°4 <br /> Sierra ConstrucGon Services, Ina <br /> 16715 N.B. 79th Street <br /> Rodmond,•Washington 98052 <br /> Attn: Mr. C3eorgo Constantine <br /> RE: SUMMARY OF CrITA1�CFINICAL GAAi�`CION5--0� EAST tiIAPE FOR <br /> SEPA SUBHIITTAT., IN'I'RAWES SEAWAY SITE, ��ERETT. <br /> WASfIII�TG'POIY .r.�4—--` <br /> In accordance with your request, this letmr summarizes our geotechnicat observations, <br /> recommendadons and conclusions tegu�ding the east slope of the subject site for use with the <br /> SEPA submittal. Delails of the discussion presentcd in this lettcr are contained in our flnal <br /> geotechnical report, which will be submitted shortly. <br /> Our wo[k inCluded tlu following; 1) reviewing the United States Gcologic Sucvcy map of <br /> the area to determine local geologic conditions, 2) reviewing portions of Everett Municipal <br /> Cade �1:MC) 1.9,37, MDNS No. 37-89 (and the City Council's appcal deciston) and a June <br /> 18, 19:�3, letter fmm tho City of Evcrctt to S�aStst Bank regarding development at the site; <br /> 3) drilling 5 borings and eaccavating 21 test pits to detetmine subsurfaco condidons �n the <br /> proposed development anea; 4) performing labotatory lests to detcrmine indeac and <br /> engineering propertios of the site soils; S) rnmpleting a geologic reconnaissance of the slope <br /> to identify soil exposures, seepage zones, and any significant emsional or sl�imping areas; 6) <br /> completing enginxring analyses to develop design and construction rxommendations. <br /> GFNFRAL STCE G -�L_T.OGY <br /> The az•ea in tlu vicinity of thc Intrawest Seauay sitc conhains glacial and aonglacial deposits <br /> as old as 100,000 years. The oldest depo�its exposed on the site, layerai sand and gravel, <br /> are about 13,000 years �td, laid down during the Yashon Stade of thc Fraser dlaciadon. <br /> They are the producu of outwash s.reams from an advancing glacial ice fPDnt and are called <br /> ; <br /> Vashon Advance Outwash (commonly refernd to as outwash in this neport). Overlying the <br /> � W-b693-01 <br /> c�1fl N:IR�fH:11T11 iTRCCT•SL�ITE�GO <br /> F.o.eox arosna <br /> sFJ�rr�E.wnsHlrloTON Q8�o7 <br /> 20G•032•B02Q FAX2Ut3•833•677% <br />