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~ <br />• <br />~ <br />CENTURY WEST <br />BNGINlPRING CORPORATION FIELD OBSERVATION REPORT <br />Project: Courthouse Square Date: 30 August 1999 <br />Client: Marion County Project No. 40806.001.28 <br />I spoke with Dave of Wadsworth Construction regarding the removal of unsuitable material <br />between grid lines K and J from grid lines 4 to 6. The material removed was clayey silty gravel. <br />The material was removed because it noticeably deflected when loaded by equipment on the site. <br />According to Dave, there was a clear distinction between the light brown clayey silty gravel and <br />the underlying light gray dense sand and gravel. The unsuitable layer terminated near or just <br />below the bottom of pad footing elevation. <br />Due to the fact that there was a clear distinction between the suitable and unsuitable materials <br />and because the elevation at which the change occurred required little or no excavation below <br />pad footing elevation, no site visit was required for this excavation. <br />The area was excavated to dense native sands and gravels. The area was properly prepared for <br />the placement of engineered fill or concrete. <br />W. Matthew Rogers, Staff Engineer ~ pRO~ <br />4~ FS <br />~j'L~' `~ E N G/iyF `'r~p2~ <br />(/t/Z%~~2'`~^.' / 15179 Fy ~ <br />~ , G-3~+-Zooo <br />Reviewed by: William A. Smith, P.E. ~E~ o <br />~ l 2 , ` \,~`~ <br />~LIAM SM <br />