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OooSta##al $ <br /> <br />Project No, S 7-0124 <br /> <br />June 09, 1997 <br /> <br />Mr. Bob Pankratz <br />The Pioneer Engineering Corporation <br />734 Hawthorne Avenue NE <br />Salem, OR 97301 <br /> <br />Dear Mr. Pankratz: <br /> <br />MARION COUkrrY <br />BUILDING INSPECTION <br /> <br />Engineers raising the quality of <br />consulting service in geosciences <br /> <br />Re: <br /> <br />Geotechnical Evaluation for the Proposed Residence, Lake Street and Hill Street, Detroit, <br />Oregon <br /> <br />We have completed the geotechnical evaluation you authorized in May 1997. Our purpose was to <br />assist you in designing foundations, slabs, pavements, and in preparing plans and specifications for the <br />construction of a new building. Results of our evaluation are summarized below. <br /> <br />Subsurface Exploration Results <br /> <br />We drilled one Standard Penetration Test (SPT) boring (B-1) in the proposed construction area. Based <br />on the soil profile encountered in this boring and the site topography, we believe the site is underlain <br />by following specific soil units. <br /> <br />Fill Soils - Generally medium stiff gravelly sandy silty (ML) fill soils extending to depths of up to 11.5 <br />feet are present at the site. Fill soils depth increase from roughly 2 feet near the northern site boundary <br />to 11.5 feet near the southern edge of building pad. Considering medium stiff soil consistencies or <br />compacmess of fill, we believe, fill soil stratum was in-plaee at the site for several years, and thus, <br />have already settled considerably under its own weight. <br /> <br />Native Soils - Fill soils are underlain by native medium stiff mixtures of sand, silt, and weathered <br />pebble size rock fragments (SM/ML) extending to the maximum explored depth of 41.5 feet. These <br />soils may represent historic/volcanic ash flow and air-fall tuff deposits and/or landslid mass. This soil <br /> <br />3760 Market Sa-eat NE, #221, Salem, OR 97301, Ph: 503-587-8667, Fx: 503-399-1954 <br />1030 SW Capitol Hwy, Suite 200, Portland, OR 97219, Ph: 503-244-3006, Fx: 503-244-2942 <br />e-mail: sadettiwar t~worldnet .att .r~t <br /> <br /> <br />