Agenda - Council - 01/10/2017 - Laserfiche WebLink

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no. Our Mission: To work"ettrer to resposibty grow our community,and to provide quality,cost-effective.and efficient government services. CC Regular Session 7.4. Meeting Date: 01/10/2017 By: Bruce Westby,Engineering/Public Works Information Title: Adopt Resolution 917-01-016 Ordering Feasibility Report for Improvement Project 917-02,Rivers Bend Street Reconstructions Purpose/Background: Purpose: The purpose of this case is to adopt Resolution 917-01-016 ordering preparation of a Feasibility Report for the Rivers Bend Street Reconstruction improvements,proposed to be completed as part of the 2017 Street Maintenance Program. Background: City staff previously identified various street segments whose Pavement and Surface Evaluation Rating(PASER) values indicated that these streets should receive mill and overlay improvements in 2017 to maintain the streets in the most cost-effective manner. These street segments are listed below, and are generally shown in Figure 1 attached. • 147th Lane—Xkimo Street to Waco Street • 148th Avenue—Yakima Street to Xkimo Street •Xkimo Street— 147th Lane to 149th Avenue •Yakima Street— 148th Avenue to 149th Avenue On December 13,2016, Staff requested Council authorization to prepare a Feasibility Report for a proposed 2017 Mill and Overlay Improvements project designated as City Improvement Project 917-02.As was noted in the case, Staff proposed to complete pavement corings while preparing the Feasibility Report to minimize risks associated with existing pavement thickness issues encountered while overlaying Sunwood Drive in 2016 which resulted in increased project costs. These issues occurred when the milling machine encountered existing pavement that was less than 2"thick. This resulted in the need to excavate a couple of inches of existing aggregate base material so patches of new bituminous base course could be constructed to provide a surface for the new bituminous wear course to adhere to. Twelve pavement corings were therefore taken on these streets which unfortunately showed that insufficient pavement exists to complete mill and overlay operations on as originally proposed. Staff is therefore requesting Council authorization to prepare a Feasibility Report for reconstructing the entire existing bituminous pavement section on these streets instead. Staff will attempt to minimize project costs by replacing only damaged concrete curb and gutter, similar to what was proposed with the mill and overlay improvements. Staff will also compare estimated costs for completing a traditional pavement removal and replacement project where the existing pavement is broken into chunks and hauled off site,versus a pavement reclamation project where the existing pavement is ground up on site and either hauled away for use on another project, or mixed with some of the existing aggregate base to strengthen the base for the new pavement section,