Agenda - Council Work Session - 01/19/2010

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and the face of the curb. Figure 2 illustrates both the existing street profile and the proposed reconstructed street sections. Curb chokers will be placed at the 143rd A venue intersection and at the north and south ends of the project. Chokers narrow down the street width by extending the curb into the parking lane. The narrower street width tends to slow traffic speed and contributes to increased pedestrian safety by reducing the crossing distance. Approximately 60 on-street parking spaces would remain along the west side of the street after allowing for driveway cuts and chokers. Boulevard trees would be installed on both sides of the street at 35 foot intervals and street lights would be placed at each of the six intersections. In addition one light would be placed mid block between 140th Avenue and 141 st Lane and two more between 143rd Avenue and CSAH 5. This would place uniform lighting along the entire length of Dysprosium Street. The street proj ect would begin just south of 140th A venue which is the point at which new pavement from the Bunker Lake Blvd project terminates. The width of the pavement would taper at both ends of the project until reaching the 34 foot wide section illustrated in figure 2. Existing catch basins shall be relocated to accommodat~ the narrowed width of the street. In addition, additional storm sewer will be extended be extended approximately 400 feet south of the catch basins located south of 141 st Ave as is illustrated in Figure 3. This area has a flat grade and the additional drainage will improve anticipated pavement life. This additional drainage may also allow the steep driveways in this area to be flattened. This project will reconnect each existing driveway opening to the newly paved street. The driveway approaches between the street curb and sidewalk shall be replaced with concrete at a standard width of 25 feet. The driveway pavement beyond the sidewalk shall be neatly sawed and replaced with the same material. The width shall be tapered to match smoothly into the existing driveway. Restoration shall include the protection or repair of any irrigation systems or invisible fence. Mail boxes may be relocated to accommodate construction but shall be returned to their original locations upon termination of the project. Disturbed turf areas shall be restored with topsoil and sod. ESTIMATED COSTS The cost of this project including overhead is estimated to be $672,911. Details of the project construction cost are presented in Appendix A. The project overhead, which adds an additional 30 % of the construction cost include the following: . Engineering design 8% . Project administration 5% . Bonding and legal 2% . Inspection and testing 5% . Contingencies. 10% Draft 1-12-10 Page 3