Agenda - Public Works Committee - 08/21/2018

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Public Works Committee 5. 2. Meeting Date: 08/21/2018 By: Bruce Westby, Engineering/Public Works Title: Consider City Council Recommendation to Review Feasibility Report and Order Public Input Meeting for Improvement Project #18-02, HY-10 Ramsey Street Reconstructions Purpose/Background: Purpose: The purpose of this case is to consider a recommendation to the City Council to review the Feasibility Report and order a Public Input Meeting for Improvement Project #18-02, HY-10 Ramsey Street Reconstructions. Background: City Improvement Project No. 18-02 proposes to reconstruct streets within the HY-10 Ramsey neighborhood including 146th Avenue, 147th Avenue, and Ferret Street. The streets total approximately 1,400 linear feet (0.27 miles) in length. A map showing the location and scope of the proposed improvements is included as Figure 1 in Appendix A of the attached Draft Feasibility Report. The streets were constructed in 1988 with bituminous curb to a width of 40 feet from face -of -curb to face -of -curb, and are generally centered within a 66-foot wide right-of-way. However, during the Highway 10/Armstrong Interchange project the west end of 146 th Avenue was reconstructed and a temporary cul-de-sac was constructed. The storm sewer system consists of openings in the bituminous curb at the north end of the Ferret Street cul-de-sac and the east end of the 146th Avenue cul-de-sac. Utility easements exist north of Ferret Street and along the northern boundary of the eastern Ferret Street cul-de-sac which has shallow ditches leading towards Armstrong Boulevard. Storm runoff from 147th Avenue is collected in catch basins placed as part of the 2012 Sunwood Drive re -alignment project, and is carried under Armstrong Boulevard to existing regional ponds. The existing bituminous pavement section ranges from 1.6 to 6.1 inches thick, with an average thickness of 2.9 inches, and the aggregate base ranges from 4.3 to 15.5 inches thick, with an average thickness of 9.7 inches. This was determined from Ground Penetrating Radar (GPR) analysis performed by Braun Intertec in 2017, as well as from field observations and record plan documents. Copies of Braun Intertec's GPR results are included in Appendix Cof the attached Draft Feasibility Report. The pavement section was built on sandy subgrade material generally considered suitable for pavement support. City staff evaluates and rates the condition of pavement sections on all City streets on an annual basis using the Pavement Surface Evaluation and Rating (PASER) system. In the summer of 2017, the pavement section of the above referenced street segments were rated with a PASER rating of 2 which indicates these streets require complete reconstruction. City staff patch the streets at least once per year, particularly before winter so the street can be plowed without further damaging the pavement in the process. Pictures of the street are located inAppendix A of the attached Draft Feasibility Report. On July 11, 2017, the City Council adopted Resolution #17-07-170 authorizing the preparation of a Feasibility Report for the reconstruction of HY-10 Ramsey. These streets were originally included in the City's CIP as proposed 2015 overlay improvements. However, the overlay work was delayed when construction of the Highway 10 & Armstrong Boulevard Interchange was funded. Then following completion of the Interchange, the pavement was re-evaluated and Staff determined it would be best to reconstruct these streets in the future. This project is now listed in the current 10-year CIP as a total reconstruction.