Agenda - Public Works Committee - 03/15/2022

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Public Works Committee Meeting Date: 03/15/2022 Submitted For: Joe Feriancek, Engineering/Public Works By: Joe Feriancek, Engineering/Public Works 5.3. Title: Consider Recommending City Council Approving Plans and Specifications and Authorizing Advertisement for Bids for Wood Pond Hills 2nd — 5th Street Reconstructions, Improvement Project #22-06 Purpose/Background: Purpose: The purpose of this case is to consider recommending City Council approving plans and specifications and authorizing advertisement for bids for Wood Pond Hills 2nd — 5th Street Reconstructions, Improvement Project #22-06. Background: City Improvement Project 22-06 proposes to reconstruct the streets within the Wood Pond Hills 2nd 3rd 4th and 5th subdivisions, generally located southwest of Sunwood Drive and Nowthen Boulevard. The streets total approximately 4,600 linear feet (0.88 miles) in length, and are 31 feet wide urban sections with surmountable concrete curb and gutter. A street segment summary is attached to this case. Project History • 2022 — 2031 Capital Improvement Program — listed as street reconstruction for 2022 • August 10, 2021 City Council accepted proposals for geotechnical report and topographic survey . August 24, 2021 City Council accepted proposals for utility testing . October 26, 2021 City Council ordered plans and specifications Pavement History The streets within the subdivision were built between 1993 and 1996. Pavement maintenance has included crack seal / seal coat improvement in 1998, 2005, and in 2013. Maintenance crews have performed patching over the last several years, including extensive spray patching. 2021 PASER values ranged between 2 and 6, with the bulk of the subdivision being rated at 2. PASER values of 2 are as low as any street segments within the City. Ground Penetrating Radar (GPR) was performed on the street segments. Bituminous pavement thickness was found to have an average thickness of 2.9 inches. Aggregate base thickness was found to have an average thickness of 4.4 inches. The overall average section thickness was 7.3 inches. Proposed Improvements Staff review of the geotechnical report found the sub -base material as poorly graded sand and poorly graded sand with silt, these materials are well suited for pavement support and are considered non -frost susceptible and are also free draining materials. With the sub -base material being sufficient, Staff is proposing to use the current standard City pavement section of 4-inches aggregate base, and 3.5-inches new bituminous pavement. The 4-inches of aggregate base is proposed to be compose of recycled reclamation material. Staff review found the existing pedestrian ramps within the project area did not meet current ADA requirements, therefore all four pedestrian ramps will need to be removed and replaced. The concrete curb and gutter in the project area were found to generally be in good condition, and only spot repairs are proposed. Staff is proposing minimal impacts to the existing bituminous trail which crosses through the project, beyond what is required for matching into the new pedestrian ramps.