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C � H <br />9 x9H to <br />H z� <br />FC c7 <br />H xl <br />'OT.1 H'i1 <br />rA H <br />y r <br />MH <br />z 17 <br />HMO <br />0 u c') <br />ZHO <br />ryz <br />HH <br />t7 Vi <br />O H <br />C] c7 (n <br />rr7'. <br />H O ca <br />\\ .•A A <br />y <br />TERRA ASSOCIATES, Inc. <br />Consultants in Geotechnical Engineering, Geology <br />and <br />Environmental Earth Sciences <br />April 28,1989 <br />Project No. T-1005 <br />Mr. John McConaghy <br />McConaghy Construction Company, Inc. <br />8902 Gravelly Lake Drive S.W. <br />Tacoma, Washington 98299 <br />Subject: Geotechnical Engineering Study <br />Proposed Woodbrook.Apartments <br />112th Street S.E. and 7th Avenue <br />Everett, Washington <br />Dear Mr. McConaghy: <br />As requested and in accordance with our proposal dated March 30, 1989, we have <br />conducted a geotechnical engineering study for the proposed Woodbrook Apartment <br />crmplex to be constructed near the northwest corner of intersection of 112th Street S.E. <br />and 7th Avenue in south Everett, Washington. The approximate location of the project <br />site is shown on the Vicinity Map, Figure 1. The purpose of our study was to explore the <br />subsurface soil and groundwater conditions across the property in order to provide <br />geotechnical recommendations for foundation design and construction, site preparation <br />and grading. The scope of our study included excavation of several backhoe test pits, <br />laboratory tests on representative samples, geotechnical engineering analyses and the <br />preparation of this report. This report presents the results of our study. <br />SUMMARY OF FINDINGS <br />Our study indicates that the site is generally underlain at a shallow depth by native firm <br />glacial till soils. Dense, relatively clean outwash sands and gravels were also observed in <br />some of our test pits. An average of 6 to 14 inches of soft topsoil and one to two feet of <br />loose organic rich overburden silty sands overlie these firm soils throughout the site. <br />These t icknesses generally increase near the creek in the central portion of the site. The <br />upper overburden soils are less thick and more firm in dry areas. Areas of localized loose <br />fill soils were roted in Test Pits TP-8 and TP-10. <br />15301 N.E. 90th Street • Ketlmona, vvasnmgum jovoc - vvnc ram,,.., ..... <br />Mailing Address: P.O. Box 3338 • Redmond, Washington 98073 <br />