6.1.B. SR 12-18-2006 - Laserfiche WebLink

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I I I I I I I I I I I I I I I I I I I November 29, 2006 -Project 06-507B 2007 Street Reconstruction Deerfield 3rd Addition Improvements Elk River, Minnesota 2. To provide a report of our findings including the results of our subsurface investigation and recommendations regarding earthwork, fill and compaction, utility installation, subgrade preparation, and a design R-value for pavement design. General Site Conditions: The proposed project site is located in an existing residential neighborhood east of US Highway 169, North of 189th Avenue NW and south of 192nd Lane NW in the City of Elk River. The existing residential streets are bituminous surfaced with no curb and gutter. The site is gently rolling with slopes of 6-12 percent. The streets _ throughout the neighborhood are generally showing their age with distress cracking common. Available Subsurface Information: According to the Geologic Map of Minnesota, Quaternary Geology, prepared by Howard C. Hobbs and Joseph E. Goebel (1982, Minnesota Geological Survey), this site lies within an end moraine of the Pine City Moraine association. It is associated with the Des Moines Lobe glaciation of Pleistocene, Late Wisconsinan age. The till of this moraine consists of grey, calcareous drift with shale and limestone clasts derived from parent material in Manitoba and eastern North Dakota, but is often mixed with reddish till incorporated from the underlying Superior Lobe. According to the Soil Survey of Sherburne County prepared by the Soil Conservation Service, this site lies within the Hayden-Braham-Emmert Soil Association. These consist of undulating to steep soils over limy, grey glacial till mixed with red till or gravel or capped with fine sand. Most of the individual soils mapped on this site have slight to Page 2