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I I I I I I I I I I I I I I I I !I I I The commercial component of the system demand was assumed to be the water requirement for the Southside Center given in the P. U. D. application, As shown in Table IV-2, the ultimate average daily requirement of 155,000 gallons for the Southside Center was assumed to build up over a five-year period from 12 percent of the ultimate starting in 1984 to the full demand in 1988 and to remain constant at that level through 1990. The peak day demands were estimated to be 2.6 and 3.0 times the average day residential and commercial require- ments, respectively. Based on these assumptions, the average daily system demand by 1990 would be 336,250 gallons or an average supply rate of 234 gpm and the estimated peak day requirement, exclusive of fire demands, would be 0,94 mgd. The raw water supply and treatment components of the water system would be sized to provide the average day demand of the South Rifle Division plus the maximum fire demand, A fire demand of 3,000 gpm for three hours was specified for the Southside Center in the P. U. D, application. Using the Insurance Services Office criteria1l it was assumed the three-story motel in the Southside Center would govern the fire demand through the year 1990. The fire demand for the Southside Center was increased 500 gpm for two hours to provide for a residential fire occurring at the same time, Accordingly, the peak fire demand for the proposed water system would be 3,500 gpm and have a volume of 600,000 gallons. A design capacity of 1,0 mgd (approxi- mately 700 gpm) was adopted for the river intake, pumping stations, and water treatment plant, This capacity is sufficient to simultane- ously supply the average day plus the full fire volumes. 11 Grading Schedule for Municipal Fire Protection; Insurance Services Office, 1974. V-4