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AGREEMENT FOR ENGINEERING DESIGN SERVICES <br /> FOR THE <br /> CITY OF DECATUR <br /> SHADOW LANE 5ANTI'ARY SEWER OUTFALL STUDY I <br /> ' ' I da of�u�r`���' 2002 b and I' <br /> THIS AGREEMENT, made and entered into tlus y , y <br /> between the CITY OF DECATUR, ILLINOIS, hereinafter refened to as the "CITY," and i <br /> BAINBRIDGE, GEE, MILANSHI & ASSOCIATES, INC., 1670 South Taylorville Road, <br /> Decatur, Illinois 62521, hereinafter referred to as the "ENGINEER," covers professional ', <br /> engineering services in connection with the preparation of a sewer infiltration and inflow study ' <br /> hereinafter referred to as the"PROJECT". <br /> Said Project has been designated CITY PROJECT b� ��`�nd includes the study of excess flow <br /> in the Cresthaven Neighborhood, specifically the Valley View,Cresthaven Park,Cresthaven Estates, I <br /> Marymount, Waterford and Shadow Lane subdivision sewers which are tributary to the 30 inch <br /> diameter sewer at the south end of Lawson Drive. This represents a total of approximately 23,800 <br /> feet or 4.5 miles of sewers. <br /> THEREFORE, in consideration of these premises and of the mutual covenants herein set forth: <br /> THE ENGINEER AGREES: <br /> 1. To perform the following engineering services in a phased approach. <br /> PHASE 1: The first phase of the study will be the gathering of information on the physical <br /> construction of the sewer system,monitoring the flow and water levels in the sewers, and the <br /> identification of flow restrictions in the sewers. Computer modeling will show the hydraulic <br /> operation of the sewers under current conditions. <br /> a. Conduct flow and level monitoring in key manholes to determine dry weather and wet <br /> weather flows in each of the subdivisions. <br /> b. Tabulate the sale of potable water in the study area to determine the theoretical base <br /> flow in the sewers. <br /> c. Based on engineering principals,analyze the flow records to determine the breakdown <br /> of base flow, infiltration and inflow in the system. <br /> d. Use dynamic computer modeling to evaluate and show the impact of extraneous flows <br /> in the sewers. <br /> BGM 02-042 ENG AGREE - 1 <br />