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. �� <br /> :, � ; <br /> ���� FAlt�► <br /> Consuita��ts In�c. <br /> o�.eannww�se�lnK..,a�N.p.i. <br /> b[e�Mameoal�clentUn <br /> October 28, 1987 E-:i592 <br /> Berkley Structures, Inc. <br /> 201 Elliott Avenue West, Suite 203 <br /> Seattle, Washington 98115 <br /> Attention: Mr. A1 Clow <br /> Gentlemen: <br /> We are pleased to eubmit herewith our report enti.tled "Geotechnical <br /> Engineering Study, BCAC Wirehouse Site, Everett, Washington". This <br /> report presents ;:he results of our field exploration, selective <br /> laboratory tests, and engineering analyses. The purpose and scope <br /> of our study was outlined fn our proposal dated October 19, 1987. <br /> Our field exploration encountered thick fills 1n the extreme <br /> noithwest corner of the proposed building. The east building wall <br /> is to be located adjacent to a near vertical to very steep slope <br /> overlooking a borrow pit. Finish floor elevation of the warehouse <br /> is to be eix hundred seventy-two (672) feet, and the office is to be <br /> six hundred eiqhty-four (684) feet. Retaining structures will be <br /> needed along the east side of the property. Wall design criteria <br /> for the fill retaining east wall have been submitted in a letter <br /> dated October 16, 1987, but we understand these will be revised <br /> again during this project. <br /> Depending on final aite grade, up to tventy (20) feet of fill will <br /> be placed under the northeast and southwest corners of the proposed <br /> structure. The footings will likely be placed partly in cut and <br /> partly in fill . The footings should be design�ed to be rig`d across <br /> the transition between the cut and fill to reduce settlement relatea <br /> distortion. The building corners to be locat�sd in the deep fills <br /> should also be reinforced as rigid members. Depending on the final <br /> building elevations, we believe the extreme northwest corner of the <br /> proposed warehouse footing alignment should be overexcavated to a <br /> depth af at least five feet and the excavated material replaced with <br /> a compacted structural fill. <br /> After construction, all cut and fill slopes should be protected <br /> against eroeion damage. This can be accomplished by seed.ing with a <br /> rapid-growth deep-routed vegetative mat, possibly in conjunction <br /> with a geotechnical fabric. <br /> This report has been prepared for specific application to this <br /> project in a manner consistent with that level of care and skill <br /> ordinarily exercisec! by other members of the profession currently <br /> 1805�1�fi1nPleceNE Su,ia�b� Bauevue Wesn�ngion9B00S Beiir�ari706�6aJ�]�Bn Seatl�e�706��6a�1�tl< <br /> p11E M��SVeN Sene107 PO Bo. 1�17N Tarome Wes��ngmn9P����99oq 7eroma�70fiipTJ�660B <br />