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TABLE 6 -6. PROJECTED AVERAGE DAY USE4 CITY OF CENTERVILLE I Projected Average Day Use (MGD) Year Residential Industrial Commercial Institutional Unaccounted -for Total 2000 0.163 0.063 0.050 0.006 0.010 0.292 2005 0.195 0.063 0.059 0.006 0.013 0.336 2010 0.225 0.063 0.059 0.006 0.017 0.370 2015 0.250 0.063 0.059 0.006 0.021 0.399 2020 0.276 0.063 0.059 0.006 0.025 0.429 TABLE 6-7. PROJECTED WELL FIRM CAPACITY CITY OF CENTERVILLE$ Projected Maximum Day Use (MGD) Year Residential Industrial Commercial Institutional Unaccounted -for Total 2000 0.505 0.142 0.113 0.014 0.031 0.805 2005 0.605 0.142 0.133 0.014 0.040 0.934 2010 0.698 0.142 0.133 0.014 0.053 1.040 2015 0.775 0.142 0.133 0.014 0.065 1.129 2020 0.856 0.I42 0.133 0.014 0.078 1.223 (') Well No. 3, with a pumping capacity of at Least 700 gpm, will be required before the year 2001. 6.3 WATER SUPPLY REQUIREMENTS The criterion used to determine the amount of required production is given in the American Water Works Association's Manual of Water Supply Practices. This criterion states that the pumping installation should be sized to provide maximum day demand with any one of the pumps, preferably the largest pump, out of service. This concept is commonly referred to as firm pumping capacity. Although a well pump failure on the maximum day is unlikely, there is a remote possibility that it could occur. Information on the existing wells and their locations has been presented in Chapter 4 - Existing Water System. The City's existing firm pumping capacity of 0.675 MGD is sufficient to meet thew current demands, but will be inadequate" by t`�ie year 2000/The firm capacity of 0.675 MGD is based on pumping 18 hours a day. Because of minimal demand during nighttime hours, the City's reservoirs will fill late at night and the wells will shut off until early morning. Therefore, 18 hours of pumping per day is the reasonable maximum time a well will operate. CWP- 260A.080 6-4 260-080 -25