01-08-07 Full Agenda Packet - Laserfiche WebLink

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pavement surface. In a mill and overlay, the existing surface is ground ofr and . replaced with new pavement. correcting issues with the old pavement surface and creating a structural improvement. PROPOSED STREET CONSTRUCTION The following describes staffs recommendations for improvements to the pavement on each street. All of the streets have segments of curb and gutter which have sunk or been damaged~ spot curb replacement is proposed as needed on each of the streets. If driveways are impacted for spot curb removal or morc cxtensive pavement/subgrade corrections are needed, the removed portion of the driveway will be replaced in-kind with asphalt or concrete. Any sod that is damaged as a result of the project will be replaccd. Staff evaluated all of the streets listed in this report and compared visual observations to the projected 2007 PCI values calculated by the GoodPointe software. The estimated 2007 PCI values are in line with what staff observed in the field, except as noted in the narrative below. Katie Lane and Katie Court The existing bituminous pavement is in need of reinforcement. Staff recommends that the street will be milled to a depth 01'2 inches and fortified with a 2 inch bituminous overlay. By prcserving the existing curb lines along this scgment, the new vcrtieal alignment will approximate the inplace alignment. Necessary corrections to the subgrade will bc made in areas exhibiting more severe signs of distress prior to paving thc overlay. . The PCI values for these streets range from marginal to adequate. While improvements to the adequate segments of the street may seem premature, when combined with the marginal segments, it will likely be more cost effcctive to make improvements at this time. If improvements were postponed, the ovcrall project costs would increase due to more deterioration on portions of the streets, as well as steady increases in construction costs. Also, in keeping with the neighborhood approach, proposing improvements to both streets at the same time minimizes the inconvenience that residents will experience during construction to onc construction season, as opposed to two or more. There is potential that additional development may occur on Katie Lane in 2007. No official submittal has been made to thc Community Development department. Staff has contacted the potential developer, who has indicatcd that they plan to submit a proposal ifthere is a positive response~ howcver, they could not provide a firm answer at this time. Stafl recommends keeping the improvements to Katie Lane and Katie Court in the proposed project. Staffwill remain in contact with the developer to detennine if the timing of the proposed development will conflict with the proposcd street improvements, and make adjustments as necessary. Construction equipment is not necessarily desired on new pavement, but it typically is not as heavy or damaging as garbage trucks or other heavy maintenance vehicles that regularly travel the streets. A possible alternative would be to seal coat the streets and postpone a mill and overlay until after the development is constructed, with the understanding that the costs will likely be higher than if completed this year. . 17