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

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Copies of Braun Intertec's GPR results and NTI's Geotechnical Exploration Report 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 Pavement Surface Evaluation and Rating (PASER) system. In the summer of 2018, the pavement sections of the above referenced street segments were rated with a PASER rating of 2, with the exception of the south half of Krypton Street receiving a rating of 4. PASER ratings of 4 and below generally indicate the street requires complete reconstruction. Pictures of the existing streets are located in Appendix A in the attached Feasibility Report. Proposed Improvements All damaged concrete curb and gutter sections are proposed to be removed and replaced. The existing bituminous pavement section will be reconstructed using the Full Depth Reclamation (FDR) process, which involves reclaiming the existing bituminous pavement section, along with a portion of the underlying aggregate base. The reclaim material generated by this process is then spread over the reshaped and compacted existing aggregate base between the curb and gutter. Excess reclaim material is then removed and hauled off site to allow 3'/2-inches of new bituminous pavement to be placed over the remaining compacted reclaim material. This results in a 7-ton pavement design, which is the City standard for residential streets. No improvements are proposed to the existing sanitary sewer and watermain infrastructure. However, these systems will be tested, and if repairs are needed they will be completed separately and paid for with utility enterprise funds. Storm sewer catch basins are proposed to be repaired as needed, including resetting of castings. Estimated Costs The engineer's opinion of probable costs for completing the proposed improvements outlined in this report is $372,236.52. Estimated costs include 5-percent contingency costs plus 23-percent indirect costs for administrative, engineering, finance and legal costs. A summary of the engineer's opinion of probably costs is included in Appendix Bin the attached Feasibility Report. Funding Program This project is proposed to be funded using a combination of street reconstruction bond proceeds in the amount of $291,590.84, special assessments to benefiting properties in the amount of $76,918.30, and storm sewer funds in the amount of $3,727.38. A total of 59 benefiting parcels have been identified as eligible for special assessments. Staff recommends applying 25-percent of all eligible project costs equally across the 59 assessable properties using the "per lot" assessment method as allowed by the City's adopted Special Assessments Policy. Eligible project costs include all costs except those related to subgrade corrections and public utility improvements. This results in a proposed preliminary assessment rate of $1,303.70 per assessable parcel. Staff recommends ordering a special benefit consultation report for this project to verify the proposed assessment amount will not exceed benefit to the properties. If the report concludes the benefit to assessed properties is less than the proposed preliminary assessment rate, Staff will then propose to lower the assessment rate accordingly during the Assessment Hearing, which is scheduled for October 8, 2019. If the report verifies the assessment rate as proposed is justified, Staff will propose to adopt the final assessment roll using the rate as preliminarily proposed. This improvement project is listed in the City's current 10-year Capital Improvement Plan. Public Comment Staff conducted a public information meeting on Wednesday, November 7, 2018. The purpose of the meeting was to present the proposed improvements, estimated costs, funding program, and preliminary project schedule to