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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />.1 <br />I <br />I <br />I <br />I <br />I <br />II <br />I <br />I <br />I <br /> <br />November 13, 2006 <br />Project 06-507 A <br />2007 Street Reconstruction <br />Irving Avenue Area Improvements <br />Elk River, Minnesota <br /> <br />2. To provide a report of our fmdings including the results of our subsurface <br />investigation and recommendations regarding earthwork, fill and <br />compaction, utility installation, subgrade preparation, and a design R-value <br />- -_._-- - -- ----- - -------------- <br /> <br />for pavement design. <br /> <br />General Site Conditions: <br />The proposed project site is located in an existing residential neighborhood south <br />of School Street NW and west of Jackson Avenue in the City of Elk River. The <br />existing residential streets are bituminous paved with no curb and gutte~. The site <br />is relatively flat with slopes of2-6 percent. The streets throughout the <br />nei~.~~r~oo~. flI"e. gel?-~rally .sl~o'Ning;tl1e.ir_ ag~ wi~dis~ess. cra.~.~.rlg .~~~.on.. .. ..... _. _ . <br /> <br />Available Subsurface Information: <br />According to the Geologic Map of Minnesota, Quaternary Geology, prepared by Howard <br />C. Hobbs and Joseph E. Goebel (1982, Minnesota Geological Survey), this site lies within <br />a glacial outwash unit not associated with any particular moraine. It is associated with the <br />Des Moines Lobe glaciation of Pleistocene, Late Wisconsinan age. The till of this <br />moraine consists of grey, calcareous drift with shale and limestone clasts derived from <br />p8:l"eIlt m~~~ri8:qnManit()~a .a~d ~~s~~.fP:l\!.or:t~ p*()t~... . ... _.. ................ <br /> <br />According to the Soil Survey of Sherburne County prepared by the Soil Conservation <br />Service, this site lies within the Hubbard-Estherville-Salida Soil Association. These consist <br />of nearly level to gently rolling, sandy soils over deeply leached sand or calcareous gravel. <br />Most of the individual soils mapped on this site are sands, which have slight to moderate <br />limitations for development oflocal streets. The soils on this site typically have seasonal <br />high water tables deeper than 6 feet. <br /> <br />Page 2 <br />