Developer will provide with plan submittals estimated demands for maximum day flows based on the following:
(A) Water main design shall be based on maximum day flows, as listed in Table 10-5.1 below, plus fire flows.
(B) Appurtenances (booster, reservoirs and the like) shall be designed for peak hour of the maximum day demand with provisions for fire flow and emergency flows as required.
(C) The peak hour is 1.7 times the maximum day demand.
(D) System pressures should be maintained between 60 and 100 psi for maximum day velocity.
(E) The system should not exceed 5 fps or a head loss of 10 feet per 1,000 feet, whichever is limiting.
Table 10-5.1
Maximum Day Flows
Proposed Development | Maximum Gallons Per Capita Per Day (gpcpd) |
Low density residential Less than 5 dwelling units per acre | 440 gpcpd |
Medium density residential 5 to 7 dwelling units per acre | 440 gpcpd |
High density residential Greater than 17 dwelling units per acre | 440 gpcpd |
Commercial, industrial mix | 240 gpcpd |
Commercial/industrial mix | 240 gpcpd |
Commercial high rise | |
No landscaping or desert landscaping | 180 gpcpd |
With landscaping | 240 gpcpd |
Industrial (does not include process water) | 130 gpcpd |
Hotel/motel | 200 gal. per room |
Schools | |
Without lunch and/or shower facilities | 75 gal. per student |
With lunch and/or shower facilities | 125 gal. per student |
Malls/retail areas | 1.5 gal. per sq. foot |
(F) If a proposed development does not fit one of the above areas and the maximum is not identified in Table 10-5.1 - Maximum Day Flows, then the maximum day flow will be calculated at 220 gallons per person per day.
(G) The population density for less than 5 dwelling units per acre is 3.2 persons per unit and 2 persons per unit for population densities of 5 or more dwelling units per acre.
(Ord. passed - - )