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Rate Desi 4g n and Derivation This section of the Report details the calculation of the proposed water rates that were developed in the Study. Numbers shown in the tables of this section are rounded. Therefore, hand calculations based on the displayed numbers, such as summing or multiplying,may not equal the exact results shown in this Report. All rates shown in this section are rounded up to the nearest cent. 4.1. Proposed Adjustments Table 4-1 shows the proposed revenue adjustments from the financial plan. Water rates developed for the base year (FY 2024) reflect the results of the COS analysis, which impacts each customer class and tier differently. Revenue adjustments in subsequent years are applied across all charges, classes, and tiers proportional to the base year rates. Table 4-1: Proposed Revenue Adjustments Line Revenue Adjustments 1 i i • 1 Effective Month January January January 2 Percent Adjustment 30% 20% 12% 4.2. Bi-Monthly Service Charges Table 4-2 shows the bi-monthly service charge calculation, which consists of the Meter, Customer, and Zone 7 Fixed cost components. The Meter and Zone 7 Fixed cost components are derived based on total EMUS. Therefore, the Meter and Zone 7 unit costs (Table 3-17, Columns H and J, Line 6) are multiplied by the capacity ratio for each meter size(Column B) to appropriately reflect the share of cost by meter size(Columns C and E). A connection's share of the Customer cost does not vary with meter size, and therefore the Customer unit cost(Table 3-17, Column I, Line 6) is applied uniformly across all meter sizes (Column D). Table 4-2: Proposed Bi-Monthly Service Charge (FY 2023) B Line Meter Capacity Size Ratio Charge Charge Ch a r�g-e Charge Cb arge ($) 1 5/8 inch 1.00 $1.77 $2.83 $17.30 $21.90 $19.93 $1.97 2 3/4 inch 1.50 $2.65 $2.83 $25.95 $31.43 $29.89 $1.54 3 1 inch 2.75 $4.85 $2.83 $47.58 $55.27 $49.84 $5.43 4 1-1/2 inch 6.00 $10.59 $2.83 $103.81 $117.23 $99.67 $17.56 5 2 inch 8.00 $14.12 $2.83 $138.41 $155.37 $159.48 ($4.11) 6 3 inch 22.50 $39.72 $2.83 $389.29 $431.84 $348.90 $82.94 7 4 inch 39.50 $69.73 $2.83 $683.41 $755.97 $996.83 ($240.86) 8 6 inch 70.00 $123.57 $2.83 $1,211.11 $1,337.52 $1,993.67 ($656.15) 9 8 inch 175.00 $308.93 $2.83 $3,027.78 $3,339.54 $3,488.91 ($149.37) 10 10 inch 275.00 $485.46 $2.83 $4,757.94 $5,246.23 $5,482.57 ($236.34) WATER AND RECYCLED WATER RATE STUDY REPORT 49