05-23-2005 Council Packet - Laserfiche WebLink

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w \ ii ' i'ii 4 [ ", r 1 ? •: \ ! 5 i r ' REQUEST FOR COUNCIL ACTION DATE: May 23,2005 ^4y y , ITEM NO.: !0 Department Approval: NaoM Gregory A. Gappa Title Director of Public Services Adroinistratpr Reviewed: Agenda Section: Public Services Director's Report Item Description: Accept Quotations 39801^1 Road Lift Station Project The purpose of this project is to install a new lift station to isolate the residence at 3980 Dahl Road from the existing City Lift Station Number 24 as there have been several incidents in which this house has been severely flooded when the lift station malfunctions or loses power. These flooding incidents have resulted in several large insurance damage claims for cleanup and restoration. This area was sewered in the 1973 Saga Hill project. There are four properties served by Lift Station Number 24 with the 3980 Dahl Road residence at an elevation of 950 and the other three homes ranging in elevation from 975 to 995. Based on the topography there is limited response time before there is flooding at the 3980 residence when there are problems with the lift station. The property owner has investigated installing a check valve to prevent the back flow of wastewater into the home, but check valves are not effective when used in high pressure head conditions like this. The proposed solution is to install a new lift station to serve the 3980 Dahl Road residence. This would allow disconnecting the existing gravity sewer service that outlets into the City lift station. This service comes in near the bottom of the lift station, and if the lift station is not operating properly the wastewater level only has to rise 2 feet to begin backing up into the basement. The existing gravity service will be connected to the new lift station which will then pump the flow into the existing City lift station, so the wastewater in the City lift station will not be able to backup into the house. This lift station will be owned and operated by the City, and since this station will be located near the City Lift Station Number 24, we can complete the routine checking of this station at the same time that the other lift station is checked. The City has a small lift station from the North Long Lake sewer project that is availible to use for this project. We have obtained quotations from contractors to install the lift station, complete the electrical hook up work, and directional bore in a new forcemain to connect this station to the existing City lift station. The total cost for this lift station will be $21,750 which is very cost effective and less expensive than the cleanup and restoration costs for one wastewater backup into the house. We are recommending acceptance of the quotes for the installation of this lift station. Page 1