Agenda - Council - 08/24/2010 - Laserfiche WebLink

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and 17431 Chameleon Street; and 7931 176"' Ave and 17621 Chameleon Street. These drainage swales were constructed at the time the subdivision was originally graded and discharge into Thorn Lake. Additional storm piping will be placed on the west side of the street to protect the residence located at 17330 from flooding as there is a low area adjacent to a side door at this residence. Figure 3 illustrates the proposed drainage improvements. These swales are located within 20 foot wide drainage and utility easements. It appears that an additional easement would be required over the property at 17331 Chameleon as the drainage from the street flows through a natural swale which runs northeasterly from the Swale on the south property line toward Thorn Lake. Water quality treatment will be provided by the flow through these grass lined ditches prior to reaching the lake. This project will include reconnecting driveways or installing paved aprons on gravel or dirt driveways to the newly paved street. Property owners who have driveways that currently extend to the existing roadway shall have their drive neatly sawed and reconnected to the paved roadway in the same width and with the same material as their existing driveway. Where there is no existing paved driveway 200 square feet of a bituminous driveway apron will be constructed adjacent to the edge of the roadway to prevent tracking onto the street. The length and width shall be determined in consultation with the individual property owner, but shall not exceed 200 square feet and cannot extend beyond the right of way line. City standards allow up to a 30 foot wide driveway at the street in this zoning district. Property owner wishing to have driveways paved beyond these limits will need to make arrangement privately for any additional work. 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 salvaged top soil, fertilizer, seed and mulch. ESTIMATED COSTS The cost of this project including project overhead is estimated to be $323,998. Details of the project construction cost are presented in Appendix B. The project overhead, which adds an additional 30 % to the construction cost include the following: • Engineering design 8% • Project administration 5% • Bonding and legal 2% • Inspection and testing 5% • Contingencies. 10% 3