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NELSON GEOTECHNICAL <br /> N � A ASSOCIATES� INC. <br /> GEOTECHNICAL ENGINEERS & GEOLOGISTS <br /> Main Oltice Engineering-Geology Bmnch <br /> 17371 —135"Avenue NE,A•500 437 East Penny Road <br /> Woodinville,WA 98072 Wonatchoe,WA 9880 i <br /> (A25)4U6-1669 FAX(425)401-2570 (50'J)665-7696 FAX(509)665•7692 <br /> (425)337-1669 Snohomish Counly <br /> July 30,2007 C G 5G 1 — C��i � <br /> Mr. Rollin 1. Carlson <br /> I G07 Edgcmoor Lanc <br /> rvcrett.�Vashington 98203 <br /> Consu'uction Monilorin, Pin:d Lcucr <br /> [.ngl:md Avenuc Lot <br /> Evcrctt, �Vasliinxton <br /> NGr\ Filc No.41 I SO> <br /> Dcar Mc Carlson: <br /> 1'his Icttcr summarizcs our gcotcchnical construction monitoring scrvices for your Ln�land Avcnue <br /> i CC�CCL lOC'.lCCL OIl rll^vI1I'.C� AYC!llll` IIl El�CfOII, �V1tiI1!llalCll. Wt' Il:lV�_ �1R`VIOiI��)' �CCOSfC(� 2 '='l0!CC�lI?ICiI� <br /> cnginecring rcport for the site titicd "Geotcchnical Enginecring Evaluation — England Avcnuc Lot — <br /> Hverett, �Vashinaton:' dated Junc 2. 2005. �Ve werc rctained to provide pan-timc monitoring and <br /> consultation serviccs during thc carthwork ph.�sc of construction. Wc monitorcd canhwork activitics at <br /> thc projccl on a part-timc b�sis from Scptunber I, 2005 throu�h Dccembcr 2S, 2005. Our observations <br /> and conclusions were documented in Field Reports 1 through 16.which have been submitted to you. <br /> \Ve observed and e�•aluated the constn�ction of the rein(oreed driveway retaining wall. Before <br /> constniction of the wall :md placement of the wall fill, the subgrade was evaluated. O��erall, �ve <br /> interpreted the subgr:idc to be native material in a medium dense or bcttcr condition. <br /> �Vc al,�� cv:duatcJ ihc fill pl,icecl within :wd bchind the retaining wall by prubing ��i�h a '/x-inch Ji;unetcr <br /> probc rod under modcrate pressurc and by conducting in-place density tests. ln �ener.il, the fill penctrated <br /> bct�vccn 2 to 3 inches and density test results indicated compaction of 9i perccnt or better. It is our <br /> upinion th�u the w:dl subgade, constniction of the wall. and ���all back(ill were completed with suitablc <br /> m;uu ial and icchniqurs. �md should pro��ide adcquate surport for the planned wall and driveway loads. <br /> ��� <br />