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� � <br /> Earth Consultants Inc. <br /> fitoledYNcd�F1�81rRa.'1�.GOOIOB�`4 FJ1�11afpnel11015dc�115t4 <br /> July 23, 1992 <br /> E-5343-1 <br /> SDL Corporadon <br /> P.O. Box 1685 <br /> Sellewe, WA 98009 <br /> Attention: John Akre <br /> Subject: Everett Community Theater <br /> Design Mod[6cstions <br /> Foundation Well Waterproo5ng snd Backffll <br /> Foundstion Drain Location <br /> Reference: Design Specifications <br /> Everett Community Theater <br /> Earth Consultants, Inc. <br /> Geotechnical Engineering Study <br /> E-5343, October 28,1991 <br /> Dear Mr. Akre: <br /> In accordance with your request, we have reviewed the referenced documenu for the <br /> purpose of evaluating the proposed design modi6cations with respect to wall backfill and <br /> foundation drains. <br /> It is our understanding that an alternate method has been proposed for foundadon wall <br /> back611 using the on-site soil as backfill,with volclay panels placed on the foundation walls <br /> and wich 'Miradrain' placed between the volclay panels and the native bacldill. Based on <br /> review of the referenced documents and the condidons encountered in the Seld, it is our <br /> opinion that the proposed alternate method is acceptable from a geotechnical standpoint <br /> The backfill shouid be rnmpacted to the requiremenu of struccural fill. <br /> It has become apparent during rnnstn�cdon that it dces not appear to be possible to place <br /> a foundadon drain adjacent to the bottom of the footing on two sides of elevator pit �3 as <br /> the footing elevadon is approximately five feet lower than the adjacent footings. The project <br /> plans indicate the foundadon drain is to drain away from this area, which is not practical <br /> as it is the lowest footing elevation for the project. Given the subsurface conditions <br /> encountered (no observed seepage)and that the ground surface in this area will be covered, <br /> it is our opinion that the foundation drain can be placed at the grade necessary to achieve <br /> flow, based on the adjacent footing elevations. However, if this is done, the ability of the <br /> elevator pit foundation walls to support hydrostatic pressure on the lower five feet should <br /> be verified. <br /> 1805•1361h PWce N.E.,Suite 101,Bdlevue,WasAinplon 98005 <br /> 222 E.261h Slreet,Suite 101,Tacoma,Washinqlon 98411�9998 <br /> Bellevue(206)6433780 Seatlle(206)469�1584 FAl((206)746-0Bfi0 Tacoma(206)272�6608 <br />