Agenda - Public Works Committee - 09/19/2017

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1.EXECUTIVE SUMMARY City Improvement Project 17-00proposes to reconstruct Sunwood Drive between Ramsey Boulevard/CSAH 56 and Bunker Lake Boulevard /CSAH 116which totals approximately 3,050 linear feet (0.58miles) in length.A map showing the location and scope of the proposed Figure 1 Appendix A improvements is included as in. Thissegment of Sunwood Drive was constructed in 1996 with3.5 inches bituminous pavement, 5 inches class 5 aggregate base,B618 concrete curb and gutter, and concrete storm sewer. The street was constructed to a width of 40 feet from face-of-curb to face-of-curb, and is centered within an 80 foot wide right-of-way. The storm sewer systemconsists of numerous catch basins which drainrunoff from the street to adjacent low-lying areas using concrete storm sewer pipes. City staff evaluates and rates the condition of pavement sections on all city streets on an annual basis using the Pavement and Surface Evaluation Rating (PASER) system.In the fall of 2016, this segment of Sunwood Drive wasrated with PASER ratings of 3 (between Bunker Lake Boulevard/CR 116and Jaspar Street) and 4(between Jaspar Street and Ramsey Boulevard/ CSAH 56). This indicates this segment of Sunwood Drive is past the point of completing mill and overlay improvements. The current condition of this street requiresCity staff topatch the street at least once peryear, particularly before winter so the street can be plowed without further damaging the pavement in the process.Pictures of thissegment of Sunwood Drive are located in Appendix A . Proposed improvements include removingand replacing all damaged concrete curb and gutter sections,and reconstructingthe existing bituminous pavementsection using a Stabilized Full Depth Reclamation, or SFDR, process.The SFDR process would involve milling the top 3 inchesor so of existing bituminous pavementand disposing of the millings off site, after which the remaining existing bituminous pavement would be ground upand mixed with the existing aggregate base. This reclaim material would then be spread backover the existing subgrade, which will be reshaped and compacted as needed. An asphalt emulsionstabilizing agent will then bemixed into the reclaim materialbefore it is shaped and compacted in place. Then 4 inches of new bituminous pavement willbe placed on top. This willresult in a 10-ton pavement design meetingcurrent State Aid pavement design standards. The existing storm sewer system is in good condition and based on preliminary review appears to meet all applicable current State Aid design standardsso noimprovements are proposed. An off-street10 foot wide bituminous trailexistsalong the north side of Sunwood Driveand is in relatively good condition so no improvements areproposed with this project. The engineer’s opinion of probable costs for completing the proposed improvements on Sunwood Driveas outlined in this report is $607,000. Estimated costs include 23% indirect costs for administrative, engineering, finance and legal costs. A summary of the engineer’s Appendix B opinion of probable costsis included in . Atotal of 9parcels have been identified as receiving special benefit from the improvements. These parcels are identified in the preliminaryAssessment Map and Roll which are attached in Appendix C . Feasibility Report Sunwood Drive Reconstruction City of RamseyProject No. 17-00 Page 1