Agenda - Council - 02/14/2017 - Laserfiche WebLink

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1. EXECUTIVE SUMMARY City Improvement Project 17-01 proposes to reconstruct Alpine Drive between Armstrong Boulevard/CSAH 83 and Variolite Street which totals approximately 3,600 linear feet (0.68 miles) in length. A map showing the location and scope of the proposed improvements is included as Figure 1 in Appendix A. This segment of Alpine Drive was constructed in 2001 using bituminous pavement between B618 concrete curb and gutter. The street was constructed to a width of 32 feet from face -of - curb to face -of -curb in locations where parking is restricted, and to 38 feet from face -of -curb to face -of -curb in locations where parking is allowed along one side. Alpine Drive is centered within an 80 foot wide right-of-way. A storm sewer system also exists under this segment of Alpine Drive including numerous catch basins which drain runoff 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, the pavement section of the above -referenced street segment were rated with a PASER rating of 3 which indicates this street is past the point of applying mill and overlay improvements. The current condition of this street requires City staff to patch the street at least once per year, particularly before winter so the street can be plowed without tearing up the pavement in the process. Pictures of the street are located in Appendix A. Proposed improvements include removing and replacing damaged sections of concrete curb and gutter and reconstructing the existing bituminous pavement section using a process known as Full Depth Reclamation, or FDR. This process involves milling the top 3 inches of existing bituminous pavement which is then hauled off site, reclaiming (grinding and mixing) the remaining bituminous pavement along with approximately the existing recycled concrete base material, mixing and spreading the reclaimed material on top of the reshaped and compacted subgrade, then placing 3.5 inches of new bituminous pavement on top. This results in a 10-ton pavement design that meets current State Aid standards. The existing storm sewer system is in good condition and meets all current State Aid standards and is therefore not proposed to be improved. An off-street bike trail exists along the north side Alpine Drive but is not proposed to be improved as part of this project. Pavement corings, soil borings, and associated pavement reconstruction design recommendations were just recently completed so staff has not yet had an opportunity to discuss the proposed improvements with owners of abutting properties. However, Staff recently mailed letters to the owners of abutting properties for the purpose of explaining the proposed improvements and requesting meetings with impacted and interested parties to discuss the proposed improvements and gather public input. The engineer's opinion of probable costs for completing the proposed improvements on Alpine Drive as outlined in this report is $463,000. Estimated costs include 23% indirect costs for administrative, engineering, finance and legal costs. A summary of the engineer's opinion of probable costs is included in Appendix B. Feasibility Report Alpine Drive Reconstruction City of Ramsey Project No. 17-01 Page 1