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

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lour 1111.1siion: To work together to reiposffity grow our community, and to provide quality, coat -effective, and efficient government ierrlcas. CC Regular Session 6. 1. Meeting Date: 11/13/2018 By: Bruce Westby, Engineering/Public Works Information Title: PUBLIC HEARING: Adopt Resolution #18-229 Approving Feasibility Report and Ordering Plans and Specifications for Improvement Project #19-01, Ford Brook Estates Street Reconstructions Purpose/Background: Purpose: The purpose of this case is to conduct a Public Hearing then consider adopting Resolution #18-229 approving the Feasibility Report and ordering plans and specifications for City Improvement Project #19-01, Ford Brook Estates Street Reconstructions. Background: City Improvement Project No. 19-01 proposes to reconstruct 180th Lane and Krypton Street in the Ford Brook Estates neighborhood. These streets total approximately 860 linear feet (0.16 miles) in length. Figure 1 in Appendix A in the attached Feasibility Report shows the scope of the proposed improvements. Existing Conditions Krypton Street and 180th Lane were constructed in 1981 as rural sections with bituminous pavement at a width of 24 feet. Both streets are generally centered within a 66-foot wide right-of-way. The storm sewer system consists of ditches along both sides of the streets within the right-of-way and drainage and utility easements. Storm runoff collects in the ditch along TH 47 and is carried north to Ford Brook. Sanitary sewer and watermain are not present under the streets. The existing bituminous pavement section ranges from 1.2 to 6.4 inches thick, with a median thickness of 4.3 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 2.4 to 6.8 inches thick, with a median thickness of 4.1 inches. The pavement section was built on silty sand and lean clay subgrade materials generally not considered ideal for pavement support. Two (2) soil borings were completed by Braun Intertec to assist with the preparation of the Feasibility Report. Pavement design recommendations were offered by Braun Intertec. City Staff considered and incorporated Braun's recommendations to varying degrees while preparing the report. Copies of Braun Intertec's GPR results and Geotechnical Exploration are attached in Appendix C in the attached Feasibility Report. The City evaluates and rates the condition of pavement sections on all City streets on an annual basis using the