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found undesirable materials in the top 3 feet of sub-base. These materials are proposed to be replaced with 2 feet of <br /> select granular material on top of geotechnical fabric. <br /> For the project east of Armstrong Boulevard, Staff is proposing to use the current standard City pavement section of <br /> 4 inches aggregate base, and 3.5 inches new bituminous pavement. The 4 inches of aggregate base is proposed to be <br /> composed of recycled reclamation material. <br /> For the project west of Armstrong Boulevard, Staff is proposing to use a modified reclamation rehabilitation. This <br /> will include reclamation of the existing bituminous and underlying aggregate base,removal of 2 inches reclamation <br /> material, and placement of 2 inches new bituminous pavement. This will leave 4 to 5 inches of reclamation material <br /> in place as support for the new 2 inches of bituminous pavement. This method will remove the need to remove and <br /> replace driveway tie-ins, and greatly reduce the required boulevard restoration. <br /> This project proposes to add a half cul-de-sac to the dead end on 169th Avenue west of Rabbit Street. The half <br /> cul-de-sac can be constructed within the existing right-of-way on the south half of 169th Avenue. Extensive review <br /> found no right-of-way or roadway easements currently exist for the north half of 69th Avenue. Internal Staff <br /> discussions with public safety and public works support this proposed improvement. Any improvements beyond the <br /> existing roadway would require easements, and would have severe impacts on the property along the north side of <br /> 169111 Avenue. <br /> The current swales along the streets are not proposed to be re-graded as part of this project,no issues with the <br /> drainage was discovered during project design. The existing metal culverts crossing the streets east of Armstrong <br /> Boulevard are proposed to be removed and replaced. This is to ensure the culverts will last at least through the <br /> proposed 60-year design life of the fully reconstructed streets. The culverts west of Armstrong Boulevard are <br /> proposed to remain in-place. The existing culverts are adequately functioning and are anticipated to last the design <br /> life of a reclamation rehabilitation project. <br /> Build Process <br /> •Install traffic control measures <br /> o These are maintained throughout the project <br /> •Install erosion control measures <br /> o These are maintained throughout the project <br /> •Project removals (streets east of Armstrong Blvd) <br /> o Perform and subsoil corrections <br /> •Place new concrete curb and gutter(approx. 400-foot section of 167th Lane west of Armstrong Blvd) <br /> o Existing bituminous curbing will not hold up to reclamation process <br /> •Remove excess reclaim material, shape and compact remaining material <br /> o Remove approx. 1.5 inches on streets east of Armstrong Blvd <br /> o Remove 2 inches on streets west of Armstrong Blvd <br /> o Excess reclaim is stockpiled and will be used on future City projects <br /> •Place first lift of bituminous pavement on streets east of Armstrong Blvd <br /> •Finish driveway repairs <br /> •Restore the boulevard in any impacted areas <br /> 0 4 inches topsoil, seed and hydro-mulch <br /> o Due to project timing, dormant seeding may be required <br /> •Traffic Control devices are removed as the project allows <br /> •Place the final lift of bituminous pavement <br /> •Erosion control measures are removed after restoration has been completed <br /> Preliminary Schedule Remaining <br /> •Council Approves Plans and Specifications/Authorizes Ad for Bids <br /> o June 28, 2022 <br /> • Staff Receives Bids <br />