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R-5 <br /> <br />pavement thicknesses being fairly consistent, except with the occasional <br />presence of organics deposits and swampy areas. On State Aid routes (Section <br />B), if reconstruction is performed and State Aid funds are utilized, which we <br />understand is the City’s intention, State Aid Design Standards require the <br />construction of additional shouldering and pavement width. Performing only <br />rehabilitation of the pavement structure and no more than twenty percent of <br />other improvements prevents the City from having to reconstruct the roadway to <br />a minimum width and a 10 ton design to meet MSAS standards for full <br />reconstruction. This would require significant changes to the existing roadway <br />footprint. The geometr y of the State Aid portion of Fox Street (Section B) is <br />proposed to remain the same, with proposed rehabilitation replacing just the <br />pavement structure while meeting requirements for MnDOT’s <br />‘‘Reconditioning’’ definition. <br /> <br />The portions of Section B that ar e built over organics and swamp deposits are <br />anticipated to require subgrade excavation and replacement with lightweight fill. <br />Additional geotechnical investigation is needed as part of final design to <br />determine the type, depth, and exact limits of the lightweight fill. Estimated <br />cost of subgrade excavation and lightweight fill are included in the estimates. <br /> <br />Mill and Overlay: <br />Fox Street Section C includes removing some of the existing pavement, <br />patching areas that exhibit significant deterioration and paving a new bituminous <br />surface. A significant percentage of Section C is currently built over organics <br />and swamp deposits at 6 to 7-feet deep and below. The presence of these <br />organics makes reconstruction a possibility, but will introduce similar issues as <br />the existing roadway if the organic deposits are not completely removed, which <br />is cost prohibitive. Alternatively performing a mill and overlay of the existing <br />bituminous allows the ride to be improved in a cost effective manner. <br />Performing a mill and overlay on this section does mean that it will need <br />maintenance sooner than the other two sections of Fox Street, and reflective <br />cracking from the existing roadway may be prevalent in 1-3 years after the <br />construction is performed. The mill and overlay is however, significantly <br />cheaper than reconstruction options, without the diminishing returns of a full <br />reconstruction. <br /> <br />Other Improvements: