Agenda - Council - 01/24/2017 - Laserfiche WebLink

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r i ■ Gur Missltin: To woA together to resposibly grow omit community,and to prowJde qualky,cost-affeclive,ead effrtlent govern nt se(vlces. CC Regular Session 4. 10. Meeting Date: 01/24/2017 By: Bruce Westby, Engineering/Public Works Information Title: 41; Q!, n lgi4w p4_44"y_Rpeo,,8+,,,otio44 -PLEASE NOTE: This Consent Case was moved to the Regular Agenda as Case 7.8A. Purpose/Background: Purpose: The purpose of this case is to adopt Resolution 417-01-029 accepting the Feasibility Report and authorizing the preparation of Plans and Specifications for Improvement Project 417-01,Alpine Drive Reconstruction. Background: 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 in the attached Feasibility Report as Figure I in Appendix A. Based on record plans,this segment of Alpine Drive was constructed in 2001 with 3.5 inches bituminous pavement, 6 inches class 5 aggregate base, B618 concrete curb and gutter, and concrete storm sewer. However, field observations show that the 6 inch class 5 aggregate base was substituted with roughly 5 inches of recycled crushed concrete base.No information on the reason for this substitution could be found. 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. The storm sewer system consists of 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 inAppendix A of the attached Feasibility Report. 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 would involve reclaiming the entire existing bituminous pavement section along with the existing recycled concrete base material. A portion of this reclaimed (ground and mixed)material would then be spread and compacted on top of the reshaped and compacted subgrade. Then 3.5 inches of bituminous pavement would be placed,resulting in a 10-ton pavement design meeting current State Aid standards.