5.8. SR 07-09-2001 - Laserfiche WebLink

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Howard R. Green Company Project No. 814700J Feasibility Study 2001 Overlay Improvements Elk River, Minnesota PROPOSEDIMPROVEMENTS The proposed improvement to the streets is to overlay with 1-~ to 2 inches of bituminous surfacing. The streets can be overlaid while maintaining traffic, so there will be minimal disruption during construction. Gates Avenue and Freeport Avenue will be milled on either side to ensure that they properly match into the existing concrete curb and gutter. In addition, the improvements would consist of milling and/or removal of a small portion of each driveway to ensure they can be made to match properly with the newly overlaid street. Exhibit 2 shows the relationship between life of service and strength of pavement. This graph shows that, once a street reaches 75% of years of service, the pavement strength rapidly drops and the cost to maintain the road increases. By overlaying these roads, the strength and life of the road will increase. The overlay will seal the cracking in intermediate stages. The overlay will also fill the Iow areas in the pavement, which collect water and decrease the life of the pavement. Existing transverse cracks, which are caused by freeze-thaw cycles, will likely reflect through the overlay in the future. There may be areas that need to be patched before placement of the bituminous. EASEMENTS AND PERMITS The right-of-way width for these streets ranges from 30 feet to 66 feet and is adequate for these improvements. No work is proposed outside of the right-of-way. No permits from any local or state agencies will be required for this project. NECESSITY AND COST-EFFECTIVENESS The streets being reviewed are in need of repair. The project is necessary to provide the residents of this area with a safe and adequate public transportation system. If the overlay is not done in a timely fashion, the roads will continue to deteriorate and reach a point where an overlay will not be a feasible alternative. The project will minimize maintenance cost, provide a cleaner neighborhood appearance, increase traffic safety, and minimize disruption outside of the right-of-way and to adjacent properties. The size of the project will ensure competitive bidding, from this standpoint the project is cost-effective. ESTIMATED PROJECT COST The estimated construction and project cost for the proposed improvements is provided below in Table 1. The project cost includes both construction and overhead costs. In accordance with the City's assessment manual, the overhead costs are estimated as 28% of the total construction cost. The overhead cost includes city administration, engineering design, construction staking and inspection, and fiscal and legal costs. Since this project will not require detailed plans and specifications, the overhead has been reduced to 15%. O 5PRO J\814700jLVeasibility Study2.doc 2