Agenda - Council - 02/12/2018 - Laserfiche WebLink

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lour 1111.1siion: To work together to reiposihty grow our community, and to provide quality, coat -effective, and efficient government ierrlcas. CC Regular Session 7. 6. Meeting Date: 02/12/2018 By: Bruce Westby, Engineering/Public Works Information Title: Adopt Resolution #18-035 Approving Plans and Specifications and Authorizing Advertisements for Bids for Stanhope Terrace Street Reconstructions, Improvement Project #18-00 Purpose/Background: Purpose: The purpose of this case is to adopt Resolution #18-035 approving plans and specifications and authorizing advertisements for bids for Stanhope Terrace Street Reconstructions, Improvement Project #18-00. Background: Attached is a copy of the plans prepared by City staff for Improvement Project #18-00, Stanhope Terrace Street Reconstructions. This project proposes to reconstruct three street segments within the Stanhope Terrace residential neighborhood including; • Ute Street north of Alpine Drive through the cul-de-sac, • 154th Lane between Ute Street and Roanoke Street, and • 153rd Court west of Roanoke Street through the cul-de-sac. These street segments total approximately 2,800 feet in length as shown on the title sheet of the attached plans. These streets were constructed in 1991. Based on field observations, record plan documents, and results from Braun Intertec's geotechnical report and ground penetrating radar (GPR) analysis, the bituminous pavement section ranges from 1.6 to 6.1 inches thick (average = 2.9 inches), the aggregate base ranges from 2.1 to 10.6 inches thick (average = 4.9 inches), and the pavement section was built on sandy subgrade materials generally considered suitable for pavement support. The streets were constructed with bituminous curb to a width of 29-feet from face -of -curb to face -of -curb, and are generally centered within 66-foot wide right-of-ways. City staff 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 2017, the pavement section of the above -referenced street segments were rated with a PASER rating of 3, which indicates these streets require complete reconstruction. City staff patch these streets annually, particularly before winter so the streets can be plowed without further damaging the pavement. Proposed improvements include removing existing bituminous curb and replacing it with B618 concrete curb and gutter, then reconstructing the existing bituminous pavement section using the Full Depth Reclamation (FDR) process. The FDR process involves milling the entire existing bituminous pavement section, along with an inch or more of existing underlying aggregate base. This reclaim material would then be spread over the reshaped and