Agenda - Council - 03/08/2011 - Special B&C Interviews

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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 a one and one-half inch (1 1/2") bituminous overlay over the existing pavement. Tables 3 and 4 present summaries of the project quantities and construction costs, respectively. Prior to the overlay: • Failing base and subgrade 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. • Driveways will have the adjoining street milled to form a neat joint with the newly overlaid pavement. • For streets without curbs, the edge of the overlay street will be shouldered to eliminate a significant drop off at the pavement edge formed by the increases thickness of the bituminous surface. Shouldering around corners, bends and intersection radii will be completed with 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. • For streets with concrete curbing, the bituminous edge will be milled a distance of seven feet (7') from the bituminous -concrete interface. Doing so accommodates the new bituminous overlay being rolled flush with the existing curb surface. • Deteriorated concrete curbing will be removed and replaced. • Existing pavement will be swept, tack coated, and a machine laid one and one-half inch (1 '/2") overlay will be placed by a contractor selected through the competitive bidding process. 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 City's street maintenance assessment policy, as shown in Appendix B, charges property owners a fixed percentage of the actual total project cost of the improvements. Bituminous overlays are assessed at fifty percent (50%) of the total project costs. Sealcoat assessments were modified by the City Council in 2007 to phase out all resident project costs over a seven year period by reducing assessments by seven percent (7%) per year beginning in 2008 and ending in 3