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DATE APRIL 12, 2002 T0: JAMES E. CHANDLER COUNTY ADMINISTRATOR FROM: W. ERIK OLSON °)-% DIRECTOR OF UTILITY- SERVICES PREPARED MICHAEL C. HOTCHKISS, P E �%J,g AND STAFFED INTERIM CAPITAL PROJECTS MANAGER BY: DEPARTMENT OF UTILITY SERVICES SUBJECT: BALK -GROUND WORK AUTHORIZATION NO. 2 FOR MAS I ER PLAN HYDRAULIC MODEL, UCP NO. 2044, WIP NO. 472-000-169-366.00 On March 16, 1999, the Board of County Commissioners (BCC) authorized staff to develop and finalize a continuing services contract with Post, Buckley, Schuh & Jernigan, Inc (PBS&J) for water and sewer utility Master Planning Consultant Services. On September 4, 2001, the BCC approved an agreement with PBS&J to update the water and sewer master plan. One of the important links of information in completing the master plan update is to upgrade the water, sewer and reuse hydraulic model. The original master plan agreement assumed that County staff would update the utility system hydraulic model. However, staff has not been able to meet the Master Plan Consultants schedule to provide the hydraulic model due to overwhelming demands from pnvate and in-house projects. Subsequent to the approval of the master plan task authorization by the County, County staff and PBS&J staff evaluated the hydraulic models and concluded that the existing models are madequate to meet the requirements of the current master planning effort. Also, as a result of the enhancements in modeling software and computer operating systems over the last decade, the current models could not be updated in their current form to serve the needs of the current master plan update Consequently, PBS&J was requested to submit a scope and budget to develop the existing and future hydraulic models for water, wastewater and reuse systems. It was also requested that PBS&J look at ways to integrate the County's existing investment in GIS infrastructure and to leverage the available data from various County departments to develop a master plan hydraulic model that can better represent the current conditions and predict future conditions. PBS&J developed a scope and budget to develop the County hydraulic models with the new generation of hydraulic modeling software and to utilize the vast amount of valuable existing information from various County departments such as utilities, property appraiser, planning, and Metropolitan Planning Organization (MPO). The proposed methodology establishes a link between the utility billing system, the property parcels and the hydraulic models so that there is a more representative distribution of flows and demands in the hydraulic model. ANAT.YSTS PBS&J presented County staff with an initial scope and budget for the hydraulic modeling task for approximately $295,000. Following discussions with County staff to come up with ways to more May 14, 2002 36 I