Agenda - Public Works Committee - 02/18/2020

Home

4.3 Bituminous Overlay Review Staff reviewed this project from the traditional overlay procedure. The rural sections in the Klemish, and Klemish & Flores neighborhood, has previously received an overlay. Staff proposed to complete a 6 to 7-foot edge mill of the pavement, down to 2-inches along the outside edge of the pavement, followed by a 2-inch bituminous overlay. This allows the edge of the pavement to match existing driveways, and builds up the crown of the road. The urban sections in the Sunfish Square, and Windemere Woods neighborhoods proposed to receive a 2-inch mill, followed by a 2-inch bituminous overlay. While reviewing the proposed streets, Staff discovered the pavement has deteriorated in several areas, beyond the point where a bituminous overlay is feasible. Klemish outside of Sodium Street. To complete the bituminous overlay as described above, the project costs are estimated to be $538,661.97. Staff felt this was not a cost-effective solution, given the poor condition of the streets, which in general are distressed beyond a typical bituminous overlay treatment. 4.4 Full-Depth Reclamation In the recent past, including the 2017 and 2018 reconstruction programs, streets with similar conditions received full-depth reclamation treatments. This included grinding up the existing bituminous pavement and underlying aggregate base, after which 3.5-inches of the reclaimed material is removed with the remaining used as new aggregate base. Then 3.5-inches of new bituminous pavement is placed on top. In general, the streets are still at the stage where with maintenance, Staff feels they can be useful for 5 to 10 can be spent on streets which are better candidates for overlays, or are ready for reconstruction. for the proposed project areas, with the exception of all of Klemish outside of Sodium Street. To complete the full-depth reclamation as described above, the project costs are estimated to be $751,863.92. Staff felt this was not a cost-effective solution, and given the limited founding available there are other City streets which are at the proper condition for overlay treatments. 5. CONCLUSIONS AND RECOMMENDATIONS This feasibility report explores proposed bituminous pavement overlay improvements to approximately 19,612 square yards of public streets in 2020. The street segments were proposed to receive 2-inch bituminous overlays, in conjunction with milling and full-depth patching as needed. Full-depth reclamation options were also looked at for the proposed street segments as a possible alternative to the poor conditions found during Staff review of the streets. Feasibility Report Pavement Overlay Improvements City of Ramsey Project No. 20-02 6