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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />water use increased from 587 million gallons in 1996 to 746 million gallons in year <br />2000, which represents an average increase of about 6 percent per year. The <br />City's year 2000 water use of 746 million gallons (2,290 acre-feet) is equivalent to <br />an annual average use of 2.04 million gallons per day (mgd). <br /> <br /> TABLE 4 <br /> FRY-ARK PURCHASES AND CITY WELL PRODUCTION <br />Year Fry-Ark City Wells Total Avg Day Max Day MD/AD <br /> Mil gal Percent Mil gal Percent Use (mgd) (mgd) Ratio <br /> (mil gal) <br />1996 438.5 75 148.3 25 586.8 1.61 3.8 2.3 <br />1997 468.4 72 179.6 28 648.0 1.78 4.2 2.4 <br />1998 501.6 72 191.6 28 693.2 1.90 5.2 2.7 <br />1999 536.6 82 115.9 18 652.5 1.79 3.6 2.0 <br />2000 565.4 76 180.8 24 746.2 2.04 4.9 2.4 <br />2001 5.1 <br /> <br />The maximum day water demands shown in Table 4 were calculated using a <br />combination of the daily meter readings for the Fry-Ark turnouts and the City's daily <br />well production records. During the past five years, the maximum day water <br />demand within the Fountain system has ranged from a low of 3.6 mgd to a high of <br />5.2 mgd. The ratio of maximum day water use to average day water use (MD/AD) <br />has ranged from 2.0 to 2.7, averaging about 2.4. <br /> <br />For the purposes of projecting future demands and developing a long-range <br />facility plan, it is common engineering practice to select a design demand ratio that <br />is greater than the historical average ratio but less than the maximum ratio that has <br />been experienced. If the historical average ratio were used for future planning, it <br />would mean that, during approximately half of the future years, the recommended <br />facilities might be unable to meet system demands on one or more of the highest <br />demand days. Conversely, selecting a design demand ratio equal to the historical <br />maximum ratio would mean that the full capacity of the recommended facilities <br />might only be utilized once during a ten-year or longer period. <br /> <br />9 <br />