CCP 07-17-2006 - Laserfiche WebLink

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.. CIP Discussion 7/13/2006 Page 2 . 2007,.201 I Proiects PavelJlcnt Management Program (PMP) At the May Work Session, staff prescnted preliminary results from GoodPointe Technology in relation to the City's pavement management and maintenance. Council indicated that of the scenarios presented, scenario 3, based on the desirc to increase the overall PCI (Pavement Condition Index) rating to 75, was most desirable. Staff has proceeded to detcrmine PMP projccts for the next five years that incorporates GoodPointc's recommendations. Attached is a map with proposed improvemcnts over the ncxt five years. Stall considered GoodPointe's suggestions for improvements in conjunction with the following factors: whether the street has concrete curb and gutter, and the nceds for watcrmain, sanitary sewer or storm sewer improvements. Staff also visually inspected the streets to confirm or revise the recommended maintenance strategy. Many of the streets that were listed as mill and overlay candidates were streets that do not have curb and gutter, are at least 30 years old and likely have thin layers of bituminous with an insufficient base. If these streets were milled, it is likely that the milling proccdure would result in the removal of the asphalt in its entirety, exposing thc insufficient subgrade, requiring the scope of the project to changc from a mill and overlay to a complete . reconstruct. These strects often were also found to have little to no storm sewer and poor drainage due to the lack of curb and guttcr. While staff felt that several of these streets were not candidates for mill and overlay, the pavement condition was found to be suitable for a sealeoat. Seal coating these streets would extend the life of the pavement long enough so that we could addrcss streets that are candidates for mill and overlays and do have curb and gutter and a suftjcient subgrade. As with all sealcoats, some minor maintenance would be required, such as crack sealing, patching, and leveling. Historically, streets have been sealcoated one to two years after reconstruction or mill and overlay. GoodPointe's analysis did not use this philosophy; recommendations for scalcoating occurred when the PCI of a street indicated the need for minor maintenance. Staff utilized this information, as well as visual inspections, to determine which streets were good candidates for sea1coats. During thc visual inspection of the streets, staff found that some streets with concrete curb and gutter that werc listed as mill and ovcrlay candidates had more distresses than typically recommended for a mill and overlay. The cracks and distresses present would reflect through the overlay within a few years after paving. Soil borings can be taken to detennine the presencc of a sufficient base. If one exists, these streets are good candidates for full pavement replacement. This is a procedure where the base and curb and gutter remain in place, and only the cxisting pavement is removed and replaced. Streets recommended for this type of improvement are shown as mill and overlay streets on the . attached map.