Agenda - Council - 06/28/2016 - Laserfiche WebLink

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OW t hi lon: To work together ko respotibiy grow oar community, and to provide quality, cost -affective, and efckent government tet does. CC Regular Session 7. 4. Meeting Date: 06/28/2016 By: Bruce Westby, Engineering/Public Works Information Title: Adopt Resolution #16-06-120 Accepting Bids and Awarding Contract for Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #16-06-120 accepting bids and awarding a contract for construction for City Improvement Project #16-00 Division A, Crackseal and Sealcoat Improvements. Background: As part of the City's long-term Street Maintenance Program, various city streets receive cracksealing and sealcoating improvements each year to help maximize the life expectancy of the street pavement sections. Cracksealing of streets prevents stormwater runoff from seeping through cracks in the pavement and through joints between the pavement and concrete curb and gutter and/or utility castings, reducing the potential for future pavement damage due to wet subgrade soils, especially as a result of freeze -thaw cycles. Sealcoating streets helps protect pavement from the negative effects of stormwater runoff, ultraviolet rays from the sun, and oil based by-products that are deposited on pavement surfaces by vehicles. This spring, City staff prepared final plans and specifications for a 2016 crackseal and sealcoat improvement project covering 13.53 miles of municipal streets in various locations throughout the City. On May 24th the City Council accepted final plans and specifications and authorized advertisements for bids for this work. All sealcoating was proposed to be completed using granite rock chips. In addition, two sealcoat areas were proposed to be fog sealed (Ramsey Meadows 2nd Addition and the parking lot at Fire Station 1). The total cost for fog -sealing these two areas based on the low bid is $5,855.50. In 2015 the City tried fog -sealing several street segments after sealcoating the pavement to determine if benefits outweigh costs to fog seal. Other cities have fog -sealed over sealcoat applications in recent years and reported benefits including pavement that looks newer longer, and extended sealcoat life due to reduced loss of seal coat rock over time. Fog -sealing reportedly also reduces the amount of rocks that make their way into garages, homes and businesses on tires and the bottoms of shoes. However, this spring Staff observed essentially identical amounts of loose rock on streets that were fog sealed in 2015 versus streets that were not. It was also observed that fog sealed streets lost much of their "new street" look after the first winter. Staff therefore has not observed the anticipated short-term benefits to fog sealing over sealcoating applications, and is unsure of any long-term benefits that would outweigh the cost for fog sealing over sealcoating on future projects. In 2015 Dresser trap rock was also applied to several streets on a trial basis in lieu of applying the more common granite rock chips to determine if feedback received from other cities regarding potential benefits to using trap rock