R2006-135 AUTHORIZING THE EXECUTION OF TASK ORDER NO. 10

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DEPARTMENT OF WATER MANAGEMENT Memorandum No. 2006- 15 August 28, 2006 TO: Honorable Mayor Osborne and City Council FROM: Steve Garman, City Manager John A. Smith, Assistant City Manager for Public Services Keith D. Alexander, Director of Water Management i� Richard N. Berard, Civil Engineer II SUBJECT: DeWitt Well Field Optimization Study SUMMARY RECOMMENDATION: Council adopt the attached resolution approving Task Order No. 10, with Attachments A and B, for a Continuing Agreement for Engineering Services with Black & Veatch Corporation to provide an optimization study for the DeWitt Co. well field at a cost not to exceed $84,500. BACKGROUND: The DeWitt well field was purchased and constructed in the early 1990's in response to the severe drought of 1988. The well field and Lake Vulcan are the City's two major sources of emergency water that are owned by the City. During last year's mild drought the DeWitt well field was operated for the longest time ever (63 straight days). The average daily yield was 9 million gallons (MGD), which was significantly less than the 18 to 24 MGD that the well field was originally expected to produce. An optimization study is proposed to determine if the well field can provide more water and be operated more efficiently. It will examine the mechanical systems, instrumentation, controls, hydrology and environmental issues to determine what can realistically be done to improve the well field. The study's recommendations will then be used as the basis for developing construction bid documents to optimize the well field's yield. POTENTIAL OBJECTION: None foreseen. INPUT FROM OTHER SOURCES: Illinois State Water Survey STAFF REFERENCE: Keith Alexander, Director of Water Management, telephone 424-2863, e-mail kdalexander@decaturnet.org Richard Berard, Civil Engineer II, telephone 424-2747, e-mail rnberard@decaturnet.org