Agenda - Council - 01/24/2006 - Laserfiche WebLink

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BACKGROUND Routine maintenance is the most economical method for safeguarding the public investment in 'bituminous paved streets. The bituminous street surface weakens as a result of sunlight exposure, precipitation, freeze/thaw cycles and traffic loading. As a result, the asphaltic components of the bituminous become brittle and susceptible to cracking. Once water is able to penetrate surface cracks into the road base, pavement deteriorates at an accelerating pace. To avoid this rapid deterioration, it is the goal of the City to address the preventative maintenance needs of its street system on a per/odic basis. The construction and maintenance history of the pavements proposed for the 2006 Street Maintenance Program is presented in Appendfx A. ,,oje,,,s 06-01 * The 2906 program consists of 11 individual projects. D,- · ,-, th.',,,,, includes 5.34 miles of City streets, will receive a sealcoating preceded by sealing of cracks having widths which exceed one-quarter inch. Projects 06-04 and 06-1l which involve 13.00 miles of street, will receive a one and one-half inch bituminous overlay of the existing bituminous pavement. The goal of sealcoating is to restore the imperviousness of the pavement. Eliminating water and pavement oxidation retains the fle,-,fibility of bitum/nous pavement. Sealcoating also adds skid resistance as a secondary benefit. Unlike sealcoats which only preserve the flexibility of the bituminous, an overlay provides additional strength to the pavement structure as well as a like new surface. Each project has been delineated so as to include streets of like construction and condition and having benefited lots of similar size. Most often, projects are dehneated by individual subdivisions or streets. Project 06-01 involves the first sealcoating of recently constructed streets. These streets have been grouped into a single project because funding for this first sealcoat is being provided by a developer escrow. There will be no assessments associated with this project. Project.06-02 is comprised of segrnents of Alpine Dr/ye, Sunwood Drive and Waco Street in the eastern portion of the City. These are MSA streets and do not have the typical fronting densities that are found in residential subdivisions. This project will assess the few fronting properties along these streets the average sealcoating assessment in accordance with Assessment Policy No 6. Project 06-02 also includes a 735 foot length of St. Francis Blvd frontage road which has been included since it is the only other noncommercial-assessable sealcoat project in the 2006 program. Project 06-03 includes the sealcoating of streets in a commercial and industrial area. This project will be assessed based upon area in accordance with Assessment Policy No 7 which was adopted in 2003. The remaining projects, 06-04 through 06-11, are bituminous overlay projects which have been aggregated by subdivision or similar lot sizes and will be assessed per unit in accordance with Assessment Policy No. 1. The pavement distress on these proposed overlay projects indicate that additional pavement strength is needed.