18 - Laserfiche WebLink

3.7. Equivalent Meters Equivalent meter units(EMUS) are used to allocate meter-related costs appropriately and equitably. Larger meters have the capacity to impose larger demands on the system and are more expensive to install, maintain, and replace than smaller meters. EMUs are based on meter hydraulic capacity and are calculated to represent the potential demand on the water system compared to a base meter size. A ratio of hydraulic capacity is calculated by dividing larger meter capacities by the base meter capacity. The base meter in this Study is the 5/8" meter, which is also the most common meter size. Table 3-9 shows the calculation of meter capacity ratios for each meter size. The capacity in gallons per minute (gpm) shows the actual meter capacity of the City's AMI meters and was provided by City Staff. Table 3-9: Meter Capacity Ratios Ane Meter Size Capacity(gpm) AWWA Ratio 1 5/8 inch 20 1.0 2 3/4 inch 30 1.5 3 1 inch 55 2.5 4 1-1/2 inch 120 5.0 5 2 inch 160 8.0 6 3 inch 450 17.5 7 4 inch 790 31.5 8 6 inch 1,400 65.0 9 8 inch 3,500 140.0 10 10 inch 5,500 210.0 Table 3-10 shows the meter counts by customer class and meter size, derived from the customer account data (Table 2-5). Table 3-11 shows the derivation of equivalent meters based on the capacity ratios(Table 3-9) and the meter counts(Table 3-10). The capacity ratio for each meter size is multiplied by the meter count in each class to determine the equivalent meters per class. Table 3-10: Meter Counts by Class Un Commercial/ RW Total Meter Size SFR TN4FR Industrial Industrial Irrigation Irrigatio Meter.- 1 5/8 inch 18,577 83 262 0 205 5 19,133 2 3/4 inch 2,446 11 33 0 17 1 2,508 3 1 inch 3,139 107 214 1 223 14 3,698 4 1-1/2 inch 14 221 197 0 247 84 763 5 2inch 1 120 251 1 179 33 584 6 3 inch 3 24 38 2 27 7 101 7 4 inch 1 5 10 0 5 4 26 8 6 inch 1 4 2 0 1 2 10 9 8 inch 0 1 2 0 0 0 3 10 10 inch 0 0 0 0 0 0 0 WATER AND RECYCLED WATER RATE STUDY REPORT 41