R2003-137 AUTHORIZING AGREEMENT - Laserfiche WebLink

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- • �1 COUNCIL COMMUNICATION FORM Engineering & Infrastructure Memorandum NO. 2003-51 September 8,2003 TO: Honorable Mayor Osborne and City Council FROM: Steve Garman, City Manager � Stephen Swanson,P.E., Director of Engineering & Infrastructur� Matthew C. Newell, P.E., City Engineer� SUBJECT: Lost Bridge Sanitary Sewer Study, City Project 2003-16 SUMMARY RECOMMENDATION: An item on the agenda for the September 15, 2003, City Council Meeting is the authorization of an agreement for engineering services with Bainbridge, Gee, Milanski &Associates, Inc. (BGM), for a fee not to exceed $60,000 to study the City owned sanitary sewers feeding into the Sanitary District of Decatur(SDD) interceptor that drains to the Lost Bridge Pump Station. Staff recommends that the City Council approve the agreement. BACKGROUND: The attached drawing shows the proposed Lost Bridge Sanitary Sewer Study area. The sanitary sewer system in this area along Lost Bridge Road services over 2000 homes. The SDD interceptor serving the area has experienced surcharging and the District is closely monitoring, and in the past has restricted, the extension of additional sanitary sewers in the area. Surcharges in this area have discharged raw sewage into the lake during periods of heavy rainfall and flooding. Flow monitoring that was conducted by City Engineering in the Spring of 2003, located some areas of significant storm water infiltration and inflow. It is imperative that storm water infiltration and inflow into the sanitary sewer system be located and stopped as much as practical in order to prevent backups and sewage discharges. City staff proposes to have BGM perform an indepth review of the sanitary sewer system serving the Lost Bridge area and provide the City with realistic options that can be enacted to correct the storm water infiltration and inflow problems being experienced. BGM is a very competent and respected firm in the field of sanitary sewer design. They continue to provide the City with excellent expertise and experience in the review and design of the sanitary sewer system.