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DEPARTMENT OF WATER MANAGEMENT <br /> Memorandum No. 2014-06 <br /> April 16, 2014 <br /> TO: Mayor Michael T. McElroy and City Council <br /> FROM: Ryan P. McCrady, City Manager <br /> Keith D. Alexander, Director of Water Management <br /> Jerald W. Stevens, P.E., Engineering Services Coordinator <br /> SUBJECT: Water System Hydraulic Model and Master Plan Update <br /> Professional Engineering Services Agreement with <br /> Strand Associates, Inc. <br /> SUMMARY RECOMMENDATION: <br /> Council adopt the attached Resolution authorizing a professional engineering services agreement <br /> with Strand Associates, Inc. to update the City's Water System Hydraulic Model and Master <br /> Plan in light of numerous water system changes that have been made since the last updates for a <br /> cost not to exceed $110,000. <br /> BACKGROUND: <br /> Strand Associates, Inc. (Strand) has been providing the City with water system modeling and <br /> master planning services since 2000 and has delivered the following reports: <br /> 1. Northeast Water Distribution Study, 2000 <br /> 2. Water System Master Plan, 2002 <br /> 3. SCADA Technology Plan, 2002 <br /> 4. Water System Master Plan Update, 2006 <br /> 5. High Service Pump Station and Water Treatment Plant Storage Study, 2008 <br /> 6. Water System Modeling Study, 2009 <br /> Strand has done an admirable job providing the City with these professional services. However, <br /> due to many significant system improvements that have been made since .2009, these <br /> improvements need to be incorporated in an updated Water System Hydraulic Model so that the <br /> computer model will be an accurate depiction of what is currently happening in the water main <br /> distribution system. The current model has 173 miles of the majority of the City's important <br /> water mains in it. The update will be significantly more detailed and accurate by including up to <br /> an additional 315 miles of water main. The updated model will be used to evaluate current <br /> conditions and predict future distribution improvements. Examples include: <br /> • Determine the optimal location and size for new water mains needed to replace <br /> deteriorating mains or to connect dead end mains together to form a loop to improve <br /> water pressure, volume and quality <br /> • Predict the quality of water in the water mains between the time that it is pumped from <br /> the South Water Treatment Plant and enters customer's homes and businesses <br />