Agenda - Council - 10/14/2008 - Laserfiche WebLink

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CASE # 10 RECEIVE PLANS AND SPECIFICATIONS FOR IMPROVEMENT PROJECT #06-30 ERMINE BOULEVARD CULVERT REPLACEMENT By: Steven Jankowski, City Engineer Background: This project is being undertaken to achieve two goals. It will replace the six foot diameter round concrete culvert which transmits flow from Trott Brook beneath Ermine Boulevard with a larger 6 foot by 14 foot box culvert. This existing culvert has open joints which is causing the loss of material from under the road bed. There are no culvert entrance or exit transitions which contribute to erosion particularly downstream of the culvert. The larger culvert will also reduce the upstream 100 year flood elevation which will remove a residence from the floodway. At this time plans and specifications have been prepared and all necessary permits have been or will be obtained within the three week bid advertisement period. A Conditional Letter of Map Amendment (CLOMA) has been received from the Federal Emergency Management Organization. (FEMA) to ensure that the floodplain revision will be approved following the culvert replacement. Staff has met with all four of the property owners adjacent to the project who have verbally consented their permission to enter onto their properties to pursue this work. A written release is being prepared by the City Attorney for their signatures. The tinning of this project is somewhat critical. A condition of the LRRWMO permit is that the construction should take place during late fall or early winter to take advantage of low flow conditions. It is hoped that the grading work on the upstream and downstream approaches can be accomplished prior to deep frost being encountered. The project is anticipated to require the closure of Ermine Boulevard at the project site for approximately three weeks. Staff will be notifying the neighborhood. Financial Impact: The estimated construction cost of this project is expected to be $153,000 which will be financed by the Storm Water Utility. Following the project a Final .Letter of Map Amendment (LOMA). will -need to be obtained from FEMA. Recommendation: Staff recommends the plans and specifications for IP #06-30 be accepted and that they be directed to solicit bids for construction. Action: Motion to accept plans and specifications for IP #06-30 and that staff be directed to solicit bids for construction. Reviewed By: City Administrator Director of Public Works/Principal City Engineer CC: 10/14/08 —357—