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Scenario 1 <br />Development within the entire study area will be connected to municipal water <br />supply in this scenario with the exception of the agricultural research area. Full <br />build out average day demand and peak day demands resulting from this <br />' development scenario are estimated to be 108,000 gpd (75 gpm) and 280,800 gpd <br />(195 gpm), respectively. <br />' The entire City storage and supply system as well as the low zone storage and <br />supply system will be sufficient to provide service with this development scenario <br />assuming the 700 gpm of supply added to the model to mimic the high pressure <br />' zone interaction is accurate. <br />' Scenario 2 <br />Development within the entire study area will be connected to municipal water <br />supply in this scenario. Full build out average day demand and peak day demand <br />are estimated to be 238,000 gpd (165 gpm) and 618,800 gpd (429 gpm), <br />respectively. <br />The entire City storage and supply system as well as the low zone storage and <br />supply system will be sufficient to provide service with this development scenario <br />assuming the 700 gpm of supply added to the model to mimic the high pressure <br />zone interaction is accurate. <br />Scenario 3 <br />Development within the entire study area will be connected to municipal water <br />supply in this scenario. Full build out average day demand and peak day demand <br />are estimated to be 441,000 gpd (306 gpm) and 1,146,600 gpd (796 gpm), <br />respectively. <br />The entire City storage and supply system will be sufficient to provide service <br />with this development scenario. The low pressure zone storage system by itself <br />will not be sufficient to provide service to this area under this development <br />scenario. It will require water to come from the high pressure zone particularly <br />in the event of a fire on the low pressure zone side. In addition, the low pressure <br />zone water supply system will not be sufficient even with the additiona1700 <br />gpm of supply added to the model to provide water on the peak day under this <br />development scenario. It will require water to come from the high pressure <br />zone at a higher rate on the peak day. It is our understanding that there are <br />additional PRV's within the City between the low and high pressure zones. The <br />operation of one or more additional PRV's would provide the necessary flows to <br />meet the Scenario 3 peak day demands. To confirm this assumption we would <br />need the entire water system model from Elfering and Associates. <br />' City of Elk River <br />Draft Alternative Urban Areawide Review <br />July 2011 <br />Page 35 of 84 <br />