Agenda - Council - 05/26/2020 - Laserfiche WebLink

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CC Regular Session 5. 9. Meeting Date: 05/26/2020 By: Bruce Westby, Engineering/Public Works Information Title Adopt Resolution #20-105 Accepting Bids and Awarding Contract for 2020 Crack Sealing Improvements, Improvement Project #20-00 Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #20-105 accepting bids and awarding a construction contract for 2020 Crack Sealing Improvements, Improvement Project #20-00. Background: Crack seal improvements are completed annually on between 13 and 23 miles of public street segments to cost-effectively maximize the life of the bituminous pavement. Crack sealing protects pavement by preventing stormwater runoff from seeping through cracks in the pavement and joints between the pavement and concrete curb and gutter and utility castings, reducing future pavement damage due to wet subgrade soils, especially during freeze -thaw cycles. The City's current pavement maintenance schedule calls for public streets to be crack sealed the third, seventh, and fourteenth year following construction, reconstruction, and overlay improvements. However, while this is the typical maintenance schedule it is important to note that Staff reviews the condition of all streets annually and adjusts the schedule of maintenance operations based on actual pavement conditions. A total of 15.74 miles of public street segments are proposed to receive crack seal improvements in 2020. These street segments were selected based on age, pavement maintenance history, and Pavement and Surface Evaluation Rating (PASER) values. Crack seal improvements are typically performed on pavement sections with PASER ratings of 7 or higher. Staff also attempts to select street segments that are in relatively close proximity to each other in an attempt to receive lower bid prices for mobilization and traffic control bid items. Plans and specifications for the 2020 Crack Sealing Improvements were prepared in-house as part of Staff's normal duties. A copy of the plans are attached to this case. Also attached is a figure showing which streets are proposed to receive crack seal improvements to the entire pavement surface (red lines) versus streets that are only proposed to receive crack seal improvements along the seam between the pavement and concrete gutter (blue lines). This is an area of special concern since gutters convey large volumes of stormwater runoff and the seam between the pavement and gutter runs parallel to the direction of flow. Therefore, any time this seam opens up it can allow significant volumes of water to infiltrate into and beneath the pavement section. Work is anticipated to occur between mid -June and mid -August. The work generally takes two to three weeks to complete after the Contractor commits crews to the project. Staff will maintain a project webpage, and will update it as new information is made available. Letters will not be mailed to notify the public of the 2020 crack seal improvements since the work occurs quickly and has little to no impact on the traveling public or abutting properties. Notification: