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TECHNICAL MEMORANDUM <br /> Project Name <br /> Technical Memorandum Name <br /> are designed to meet the peak demand anticipated given the probability that not all of the residents will be <br /> using water at the same time. Based on this realization, the design of small residential lines are likely to <br /> experience a higher percentage of customers using water at the same time. Major distribution lines serve <br /> much larger areas and would see a smaller percentage of customers using water at the same time. <br /> Transmission mains serve large portions of the city. As a result, the impact that any one residence or one <br /> multi-family development has on the capacity of major distribution and transmission mains is not <br /> equivalent to the maximum capacity of the meter. <br /> ALTERNATIVE METHODOLOGY <br /> Several years ago, the City implemented an automated meter reading (AMR) program. The AMR system <br /> allows the collection of meter data remotely via electronic signals. Meter data are available across the <br /> entire city on an hourly basis. Due to the extensive data available, it is possible to determine what the <br /> cumulative impact of customers is on the system. <br /> Hourly meter data were collected for the months of August 2011, 2012 and 2013. August was selected <br /> as being representative of the highest demand period. The data were separated by customer type, meter <br /> type, and meter size. The average hourly demand for all meters within a given category was determined <br /> for all 744 hours of the month for each year. Next, the maximum hourly demand for each year for each <br /> category was determined and expressed in terms of gallons per minute. Finally, the average peak <br /> demand of the three years was determined. The following table contains the results of that analysis for <br /> meter sizes and types where there were at least 10 meters in the system for a given use. <br /> 4 of 7 <br /> 11aus1 aus.apaAsharetprojects106001018-011doc!Im-impact fees 3-19-14.docx <br />