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REQUEST FOR COUNCIL ACTION mL °°TE: 7/lz/sz AGENDA SECTION', ORIGINATING DEPT. /DIV.. DEPT. HEAD APPROVAL, REPORTS AND RECOMMENDATIONS PUBLIC WORD ITEM I IVo. ITEM DESCRIPTION" SS-82-20 San sewer I & I Ike MGR. REVIEW D/ REDS : �� torat3.on Work at Mid oaks Ln snelling The city has been studying the removal of excess and undesired storm water from the sanitary sewer pipes since 1976, Since that time, extensive studies have been conducted, including one with a Federal grant. These studies have always concluded that there does exist in the sanitary sewer pipes significant amount of undesired storm water, As you are aware, the city is charged for the treatment of all this water in the sanitary sewer pipe by the Metropolitan' Waste Control Commission, Tress costs -are rapidly increasing and are costing the city hundreds of thousands of dollars per year for th i s undesired water.' Due to the nature of the problem, it is not practical to -e 1 imamate most of the f iow.s , - because it would cost more :to correct the problems than it would to leave it, The studies do show, however, that there are apparent locations where this restoration work would be cost effective, In order to verify these findings, a demonstration area near slid Oaks Lane, Ridgewood Vane, Snelling Avenue, has been devised. This area has apparent I & I problems which would require appro i. mately $40rOOO,OO to correct. To insure that the work is produc- ing the benefits expected, however, and the fact that it is the initial project alone this line, extensive monitoring is proposed This monitoring would take place before the restoration, work' occurs and, once again, immediately after to see low much of a reduction is actually obtained from the work, The engineering for this project is proposed to be performed by the consulting firm of short, Elliott and Hendrickson in combination with Donahue and Associates. They have done all of the I & I studies previously which have brought us to this point. Tie it proposal esti- mates the engineering costs for this work to be approximately 17,000*00, The cost factors involved in this have been reviewed and found to be in conformance with past agreements for this work. Funding for the work has previously been established in the per- manent improvement fund - through transfers from the sanitary sewer fund. . RECOMMENDED COUNCIL ACTION: Approval of a motion authorizing the mayor and city manager to sign an agreement with Short, Elliott, Hendrickson and Associates to provide engineering for Project SS-82-20 on I & I work.