R98-26 ACCEPTING THE PROPOSAL AND AUTHORIZING AN AGREEMENT

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, � . Possible problems with the old treatment plant site: • overhead power lines that may interfere with tank construction and mainte- nance • site elevation may require an extremely tall tank (very costly to construct) • tank would be too close to the source to allow pumps to operate efficiently • Possible problems with a site in/near"South Shores:" • NIlvIBY(not in MY back yard) issues . location of the distribution main • availability of an appropriately sized site that is properly zoned . possible zoning restrictions • Sizing the new elevated water tank . meeting the present demands and anticipating the growth for Mount Zion . meeting Illinois EPA requirements • Controls systems to allow proper system-wide operation of the waterworks Side S stem: The sy stem on the City's north side has its own unique challenges. The North y e consum tion of water by the Archer Daniels Midland lar est challenge is the extremely larg P le of its North � rin the sa the Cit is conside g ecause of this hu e consumption, y Company(AD1Vn• B g Water Treatment Plant to ADM. While this would relieve the City of many operational problems associated with a single customer o f ADM's size, the sale of the North Water Treatment Plant will create some other unique problems. If ADM does not purchase the North Water Treatment Plant, then additional elevated storage may be required on the north side of Decatur. If ADM purchases the North Water Treatment Plant, then there are possible problems of the typical fluc- tuations associated with a system that serves primarily residential customers. In either case, a system model should be developed for the north side system to determine the need, size, and lo- cation of a new tank (if ADM does not purchase the Water Plant), or to determine how to set-up controls of the present tanks and pumps for this dramatic change in the distribution system. Avoiding pitfalls and designing solutions to the project challenges are the KEYS to the successful completion of this project. Solutions which will be used by TIC to overcome the challenges and avoid the pitfalls are presented in this section. Phase I: Tank Sitins� and Design Criteria A project's success begins by laying the proper "foundation." This project's success is rooted in the development of the system model to determine the ideal tank size and to locate the optimum site for the new tank, determining what style of tank will best meet the long-term goals of the City, performing a site survey, developing a site layout to best utilize the site selected, and per- fotming geotechnical testing of the soils at the site. Performing the proper groundwork will pro- vide the base for the timely and professional completion of this important project. 3-2