Agenda - Council - 03/22/2022 - Laserfiche WebLink

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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. A portion of the cul-de-sac located on the south end of Junkite Street has had some undercutting of the existing concrete curb and gutter. This project proposes to remove and replace a portion of the concrete curb and gutter, perform a full-depth restoration of the compromised road section, and provide a stabilized erosion control mat in the boulevard area to prevent future erosion of the soils. Review of the storm sewer, sanitary sewer and watermain did not find issues requiring repair. The City will be placing inflow and infiltration barriers on the sanitary sewer manholes with this project. The City received an MCES I/I Grant for this work,which will reimburse the City for the costs associated with the I/I barriers. Build Process •Install traffic control measures o These are maintained throughout the project •Install erosion control measures •Full-depth reclamation of existing bituminous pavement and aggregate base •Project removals (spot curb and gutter,pedestrian ramps, driveways as needed) •Place new concrete curb and gutter and pedestrian ramps (5 to 7-day cure time) •Remove excess reclaim material, shape and compact 5 inches of remaining material o Subgrade excavation required to remove approximately 0.5 inches below the existing reclamation material to allow 4-inch thickness o Excess reclaim is stockpiled and will be used on future City projects •Place first lift of new bituminous pavement •Finish any trail and driveway repairs o No driveway repairs are anticipated •Restore the boulevard in any impacted areas o 4 inches topsoil, seed and hydro-mulch •Place the final lift of bituminous pavement o Remove traffic control measures as allowed •Place all pavement marking,must wait 72 hours after paving •Erosion control measures are removed after restoration has been completed Preliminary Schedule Remaining •Council Approves Plans and Specifications/Authorizes Ad for Bids o March 22, 2022 • Staff Receives Bids o April 18, 2022 •Council Awards Contract to the lowest responsible bidder o April 26, 2022 •Contractor begins construction o June 2022 •Contractor Substantially Completes construction o September 2, 2022 •Contractor Final Completion(project clean up,punch list created) o September 30,2022