Agenda - Public Works Committee - 04/18/2023

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dry during seasonally high-water. In the areas not requiring corrections, Staff is proposing to use a pavement section made up of 6-inches in -place reclamation material below 3.5-inches of new bituminous pavement. This project proposes to remove the stub street at the comer of Dysprosium Street and 161st Lane, and create a true comer, since the development of the adjacent Scout Camp property is not currently proposed to occur. In general, the current swales along the streets are not proposed to be re -graded as part of this project. Due to the nature of subsoil corrections, and raising the profile of the pavement, some areas of the project will have impacts to the in -slopes between the pavement and bottom of the swales. No changes to the current drainage pattern are proposed. The existing culverts crossing the streets are proposed to be removed and replaced, this is to ensure the culverts will last at least through the proposed 60-year design life of the street. Due to the subsoil corrections, drain tile will be added in the low areas to properly drain the pavement subbase. The drain tile is proposed to drain into the existing swales. Preliminary Schedule Remaining • Council Approves Plans and Specifications / Authorizes Ad for Bids o April 25, 2023 • Staff Receives Bids o May 19, 2023 • Council Awards Contract to the lowest responsible bidder o May 23, 2023 • Contractor begins construction o June 2023 • Contractor Substantially Completes construction o September 1, 2023 • Contractor Final Completion (verify final restoration, punch list created) o September 29, 2023 Final plans are not attached to this case to prevent potential bidders from downloading plans attached to the case to prepare and submit their bids, rather than purchasing the plans through QuestCDN, the electronic bidding software used by the City of Ramsey. This ensures all bidders are bidding off the same set of plans, and all bidders are notified of any plan revisions (addenda) issued during the bidding process. Attached is the title sheet showing the scope of the improvements, as well as a plan sheet showing the typical sections, which includes information on the proposed pavement section. Plans are available upon request from the City Engineer. Timeframe: Staff estimates up to 10 minutes will be needed to present this case and respond to questions. Observations/Alternatives: Observations: During project design and review of the initial geotechnical report, Staff noted a change in the subsoil conditions between gaps of several hundred feet in the soil borings. Additional soil borings within an addendum to the geotechnical report were acquired, which allowed Staff to more accurately place the limits to the subsoil correction areas, and expand the areas as necessary. Performing additional soil borings was discussed as a hopeful solution to change orders due to unforeseen subsoil conditions as part of the 2021 Tiger Street Reconstruction, Improvement Project #21-02. Alternatives: Alternative #1 — Motion recommending City Council approving plans and specifications and authorizing advertisement for bids for Barthel's Rum River Acres 2nd Street Reconstructions, Improvement Project #23-05. Alternative #2 — Motion of other.