Agenda - Council - 03/11/2008 - Laserfiche WebLink

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-114 The streets scheduled for maintenance are illustrated in Appendix C, the Preliminary Assessment Role. This appendix also contains a listing of the parcels receiving benefit and makes note of the number of shares being assessed if different than a single share. All streets proposed for the program have received a preliminary survey by the City Engineer and Public Works Supervisor. A post winter survey will be conducted prior to awarding bids in June. Appropriate project adjustments will be made if any of the scheduled projects are deemed to be inappropriate for sealcoating due to advanced deterioration. PROJECT QUANTITIES AND COSTS Table 1 includes a listing of street lengths and pavement areas for each crackseal / sealcoat project. Estimates are also provided for crack filling material application rates. Table 2 contains the estimated construction costs for each of these sealcoat projects. Both the sealcoating and crack filling operation will be applied by a contractor selected through the competitive bidding process. Bituminous overlay projects consist of applying one and one -half inch bituminous overlays onto the existing pavement. Tables 3 and 4 present summaries of the project quantities and construction costs, respectively. Prior to the overlay, failed areas will be removed and patched by the ' City's Public Works Department. The number of tons required for street patching is estimated on an individual project basis. The rate charged for patching will be $200 per ton of bituminous material which includes material and labor. The existing pavement will be tack coated and a machine laid one and one -half inch overlay will be placed by a contractor selected through the competitive bidding process. Existing driveways will have the adjoining street milled to form a neat joint with the newly overlaid pavement. On streets without curbs, the edge of the overlay street will be shouldered to eliminate the drop off at the pavement edge formed by the overlay. The shouldering will be done around corners, bends and intersection radii using class 2 shouldering aggregate. The major portion of shouldering on the remainder of the overlays will utilize topsoil which will be seeded, mulched and disc anchored. FINANCING In addition to construction cost, overhead charges of twenty -five percent (25 %) will be applied to cover the following services: Engineering and Inspection 10% City Staff Administration 5% Bonding and Legal 2% Contingencies 8% The overhead percentage on the nonassessable project, LP 08 -01, will be 17% since there is no bonding fees, and contingencies and staff administration time is reduced because of the relatively good condition on these newer pavements.