CCP 01-22-2006 Work Session - Laserfiche WebLink

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ell' Discussion . 1 ! 1 R/2007 Page 2 2007-201 1 Proieds Pavem~nt MmJ~lgl:;mcnt J~!.ogram ( f?Mf2 At the May Work Session, staff presented preliminary results from GoodPointe Technology in relation to the Citv's pavement manal!.ement and maintenance. Council ~ J ~ indicated that of the sCL'narios presented. scenario :t based on the desire to increase the overall pC! (Pavement Condition Index) rating to 75. was most desirahle. Staff has proceeded to detennine PMI' projects tl.lr the next live years that incorporates GoodPointe's recommendations. Attached is a map with proposed improvements over the next five years. Staff considered GoodPointe' s suggestions liJr improvements in conjunction \vith the f()lIowing bctors: whether the street has concrete curh and gutter, and the needs Illr watem1ain, sanitary sewer or storm sewer improvements. Staff also visually inspected the streets to conlinn or revise the recommended maintenance strategy. Many of the streets that were listed as mill and overlay candidates were streets that do nol have eurh and gutter, arc at least 30 years old and likely have thin layers of hiturninous with an insuflicient hase. If these streets were milled, it is likely that the milling procedure would result in the removal of the asphalt in its entirety, exposing the insuflicient subgrade, . rcquiring the scope of the project to change Irom a mill and overlay to a complete reconstruct. These streets often werc also Ilmnd to have little to no storm sewer and poor drainage due to the lack of curb and gutter. While staff kit that severa] of thcse streets were not candidates for mill and overlay. the pavement condition was tl)Und to he suitable Il)r a sealcoat. Seakoating these streets would extend the life of the pavement long enough so that \\'e could address streets that arc candidates tl)r mill and overlays and do have curb and gutter and a sufficient suhgrade. As with all sealcoats. some minor maintenance would be required, such as crack scaling, patching. and leveling. Ilistorically. streets have been sealcoated one to two vcars alter reconstruction or mill and overlay. CioodPointe's analysis did not use this philosophy: n:.commenda t ions Jl.)r sealcoating occurred when the PCI of a street indicated the need 11.1f minor maintenance. Staff utilized this information. as well as visual inspections. to determine which streets were good candidates 1l.1f seakoats. During the visual inspection of the streets. sta fr ((.lund that some streets with concrete curb and guttcr that were listed as mill and overlay candidall's had more distresses than typically recommended for a mill and overlay. The cracks and distresses present would rcllect through the overlay within a few years aHer paving. Soil borings can be taken to determine the presence of a sutticient base. If one exists, these streets are good candidates Illr full pavement replacement. This is a procedure where the base and curb and gutter remain in place. and only the existing pavement is rcmoved and replaced. Streets . recommended I()r this type of improvement arc shown as rnill and o\'erlay streets on the attached map.