Agenda - Council - 06/09/2015 - Laserfiche WebLink

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17 c'miof, 11 , iSEY Our Uissiow To work together to resposihty grow ouf communiiry, and to prowlde quality, cost-effective. and eificlent gowemmenr services. CC Regular Session Meeting Date: 06/09/2015 7.2. By: Bruce Westby, Engineering/Public Works Information Title: Adopt Resolution #15-06-147 Accepting Bids and Awarding a Contract for Garnet Street and 168th Avenue Reconstruction, Improvement Project #13-10 Purpose/Background: Purpose: The purpose of this case is to adopt Resolution 415-06-147 accepting bids and awarding a contract for Garnet Street and 168th Avenue Reconstruction, Improvement Project #13-10. Background: City of Ramsey Improvement Project 13-10 proposes to reconstruct two paved street segments including Garnet Street between 167th Street and the north plat line of Now & Then Estates, and 168th Avenue between Garnet Street and the cul-de-sac to the west. The segment of Garnet Street to be reconstructed measures approximately 1,350 feet in length, and the segment of 168 th Avenue NW west of Garnet Street measures approximately 670 feet in length. The total length of these two street segments is approximately 2,020 linear feet, or 0.38 miles. A map showing the location and scope of the proposed improvements along both street segments is attached as Figure 1. Existing Conditions Both streets were constructed in 1988 using bituminous pavement and curbing. The existing soils in this area are predominantly composed of a mixture of silty sands and clays which does not provide good structural support for pavements. No storm sewer or public utilities exist under the streets, with the exception of the north and south ends of Garnet Street where trunk water and sanitary sewer stubs exist, and a storm sewer culvert that exists under Garnet Street just north of 16$11 Avenue. Both streets have received one sealcoat application in 2006. Since both streets are relatively flat they are not able to efficiently shed stormwater runoff, resulting in stormwater runoff pooling on the pavement for extended periods of time which then strips oil from the pavement leading to accelerated degradation of the pavement. Both streets have a Pavement and Surface Evaluation Rating (PASER) of 1 and are therefore among the worst streets in the City in terms of pavement condition. In fact, several areas of Garnet Street no longer have bituminous pavement and are instead paved with class 5 aggregate to allow the streets to remain in passable condition. Then each spring when the ground thaws the streets becomes extremely difficult to navigate and maintain due primarily to the poor underlying soils which become unstable when saturated with groundwater. Proposed Improvements Subgrade corrections are proposed along both street segments to provide a uniform, stable subgrade base for the new pavement sections, thereby ensuring the new pavement sections can achieve their maximum life with minimal maintenance. The subgrade corrections are proposed to consist of excavating 3 -feet of the existing unsuitable subgrade materials and backfilling the voids with clean imported select granular borrow. Per the adopted Special