Agenda - Council - 11/13/2018 - Laserfiche WebLink

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lour 1111.1siion: To work together to reiposihty grow our community, and to provide quality, coat -effective, and efficient government ierrlcas. CC Regular Session 6. 2. Meeting Date: 11/13/2018 By: Bruce Westby, Engineering/Public Works Information Title: PUBLIC HEARING: Adopt Resolution #18-230 Approving Feasibility Report and Ordering Plans and Specifications for Improvement Project #19-02, Brookview Estates Street Reconstructions Purpose/Background: Purpose: The purpose of this case is to conduct a Public Hearing then consider adopting Resolution #18-230 approving the Feasibility Report and ordering plans and specifications for City Improvement Project #19-02, Brookview Estates Street Reconstructions. Background: City Improvement Project No. 19-02 proposes to reconstruct streets within the Brookview Estates neighborhood including 173rd Avenue and Germanium Street. The streets total approximately 2,662 linear feet (0.50 miles) in length. Figure 1 in Appendix A in the attached Feasibility Report shows the scope of the proposed improvements. Existing Conditions The streets were constructed in 1979 as rural sections with bituminous pavement to a width of 24 feet, and are generally centered within a 66-foot wide right-of-way. Sanitary sewer and watermain are not present under these streets. The storm sewer system generally consists of ditches along both sides of the road within the right-of-way and drainage and utility easements. Storm runoff collects in the ditch along Germanium Street and is carried north to the Trott Brook through an outlet pipe located in the north cul-de-sac. Storm runoff collects in the ditch along 173rd Avenue and goes across land into the Rum River to the east. The existing bituminous pavement section ranges from 2.0 to 6.0 inches thick, with a median thickness of 3.6-inches, as determined from Ground Penetrating Radar (GPR) analysis performed by Braun Intertec in 2017, as well as from field observations and record plan documents. The existing aggregate base ranges from 0.8 to 5.0 inches thick, with a median thickness of 2.7-inches. The pavement section was built on primarily poorly graded sands with silts subgrade material, which is generally considered suitable for pavement support with the proper preparation. Seven (7) soil borings were completed by Northern Technologies (NTI) to assist Staff with preparing the Feasibility Report. Pavement design recommendations were also offered by NTI, and Staff considered and incorporated NTI's recommendations to varying degrees while preparing the report. Copies of Braun Intertec's GPR results and NTI's Geotechnical Exploration Report are attached in Appendix C in