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• <br />• <br />• <br />• Consultant will collect information on the existing water system, including areas of <br />known low system pressures, and discuss approach to developing the water system <br />model with IRCU staff. <br />• Consultant will run Skelebrator to minimize model size, consisting of merging of <br />pipes in series merge pipes at isolation valves and hydrants, maintaining knowledge <br />of valves and hydrants, etc. <br />Task 2 . Develop New Water System Hydraulic Model <br />• Consultant will review MORs and water meter data to develop unit flow rates for <br />the system. Consultant will review elevated storage and repump operations and <br />update model to include these operations. <br />• Consultant will update and develop water system design and operating criteria, <br />consisting of fire flows, peak factors, system pressures, and water demand <br />allocations Peak factors will be defined based on MOR's and distribution flow <br />meter data. Fire flows will be defined based on ISO and Fire Marshall requirements <br />and IRCU input. <br />• Using the LoadBuilder feature of WaterGEMS, preliminary system demands for <br />TODAY conditions will be developed for up to ten (10) areas for various types of <br />land uses currently identified. These land use types include single family, <br />multifam ly, industrial and commercial. Meter reading sets will be evaluated and <br />compared with the demand data to develop these demands. It is assumed that <br />customer meter data is not geocoded and will need to be developed as an additional <br />or future task. It is assumed that an existing spatial relationship between the <br />customer billing database and the base parcel locations data will be manipulated to <br />complete this task and that up to 30 hours of effort is designated for this task. <br />Significant effort beyond this amount should be considered additional services. <br />• Incorporate the specific physical hydraulic features into the model. The physical <br />attributes of the existing system will be imported into the new hydraulic model. <br />Examples of these features include tank sizes, control valve settings, pump curves, <br />and several node elevations where necessary. <br />• Consultant will update elevation data provided by IRCU staff of each node <br />throughout the system that is significant. <br />• It is assumed that nominal pipe diameter will be used for modeling and be based on <br />GIS input pipe diameters database. <br />• Deliverable: A basic hydraulic model network of the water system in WaterCAD <br />v8 format with one (1) topology configuration being TODAY conditions assuming <br />maximum daily flows (MDF) and average daily flow (ADF). Output files of system <br />pressures, flows, and fire hydrant flow test results will be provided. <br />Future Tasks <br />Model results from the scope provided herein will provide initial results of a functioning <br />water system model. It is anticipated that future tasks will include more modeling runs and <br />evaluation including the following: <br />K:\WPB_Civil\General\Miller\Indian River County\IRCU Water System Modeling Preparation KHA Scope rev3.doc PAGE - 2 -• <br />137 <br />