Corona City Council
October 2, 2024

40 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 41 shows the cost allocation by cost causative components under the proposed financial plan before adjustments. Revenue offsets made up of non-operating revenues for FY 2024 shown in Table 23 will be used to offset purchased water costs in the rate design section.

Other operating revenues are allocated to each cost component based on the overall cost allocation percentages shown in the “percent of total” row.

Table 41. Rate Revenue Requirements for Test Year, FY 2024 Cost Allocation Summary Total Source of
Supply Base MDD PHD Meters Fire Protection
Customer
Service Conservation
O&M Revenue Requirements $55,012,051 $23,644,881 $13,053,467 $4,973,593 $4,243,734 $0 $0 $7,419,807 $1,676,568 Non-Operating Revenue Requirements $15,597,241 $2,655,710 $7,736,851 $2,947,872 $2,136,663 $115,338 $4,807 $0 $0 Total $70,609,292 $26,300,591 $20,790,318 $7,921,465 $6,380,397 $115,338 $4,807 $7,419,807 $1,676,568 Percent of Total 37.2% 29.4% 11.2% 9.0% 0.2% 0.0% 10.5% 2.4% Water systems provide two types of fire protection: public fire protection for firefighting, which is generally visible as hydrants on a street, and private fire protection which provides fire flow to building and other structure sprinkler systems for fire suppression within private improvements. To determine the share of total fire costs responsible to each, fire service must additionally be allocated between private and public fire connections. There are a total of 1,324 private fire connections and public fire connections total 8,537 meters. The allocation of fire costs is based on the ratio of equivalent fire meters shown in Table 21. City staff confirmed that public fire lines were connected to 6” lines, thus, 80.8 percent of the allocation is for public fire and 19.2 percent for private fire. Table 42 shows the percentage of fire costs allocated to each customer class based on potential fire flow. Public fire costs are reallocated to the meter component of the cost allocation.

Table 42. Allocation of Fire Costs
Customer Class Equivalent
Meters Percent Total Fire Allocation
Allocation by
Class
Private Fire 225,638 19.2% $203,083
Public Fire 950,261 80.8% $859,343
1,175,899.2 $1,062,426
Because they are a function of system capacity, base and peak costs are also reallocated to the meter component at a rate of 75 percent for base and 50 percent for the peak costs which will help stabilize revenues by increasing the fixed revenue collection. Utilities invest in,

41 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study and continuously maintain, facilities to provide capacity to meet all levels of water consumption, including average and peak demand.

These costs must be recovered regardless of the amount of water used during a given period. Thus, peaking costs, along with base delivery costs and fixed water system costs to meet average demand, are generally considered as fixed water system costs. To balance affordability and revenue stability, it is a common practice that a portion of the base costs and/or peaking costs are recovered in the monthly service charge, along with customer-related costs and meter-related costs. This allocation allows the City to maintain an overall fixed rate revenue percentage of 43.9 percent of the total revenues, which was a target level for increasing revenue stability. Table 43 shows the total cost allocation by cost category that will be used to allocate costs to each customer. Other operating revenue and net balances are applied based on the overall percentages allocated to each cost category in the percent of total line. Non-operating revenues are comprised of interest on investments and are applied directly to offset the cost of variable rates.

Table 43. Final Cost of Service Allocations with all Adjustments Cost Allocation Summary Total Source of
Supply Base MDD PHD Meters Fire Protection
Customer
Service Conservation Private Fire Revenue Offset
O&M Revenue Requirements $55,012,051 $23,644,881 $13,053,467 $4,973,593 $4,243,734 $0 $0 $7,419,807 $1,676,568 $0 $0 Non-Operating Revenue Requirements $15,597,241 $2,655,710 $7,736,851 $2,947,872 $2,136,663 $115,338 $4,807 $0 $0 $0 $0 Total $70,609,292 $26,300,591 $20,790,318 $7,921,465 $6,380,397 $115,338 $4,807 $7,419,807 $1,676,568 $0 $0 Percent of Total 37.2% 29.4% 11.2% 9.0% 0.2% 0.0% 10.5% 2.4% 0.00% 0.0% Other Operating Revenue ($2,209,480) ($822,988) ($650,563) ($247,876) ($199,653) ($3,609) ($150) ($232,178) ($52,463) $0 $0 Non-Operating Revenue ($1,833,132) $0 $0 $0 $0 $0 $0 $0 $0 $0 ($1,833,132) Net Balance From Operations ($8,606,681) ($3,205,821) ($2,534,165) ($965,560) ($777,717) ($14,059) ($586) ($904,412) ($204,360) $0 $0 Rate Revenue Requirement $57,960,000 $22,271,781 $17,605,590 $6,708,029 $5,403,027 $97,670 $4,071 $6,283,217 $1,419,746 $0 ($1,833,132) Re-Allocation of Peaking and Base $0 ($13,204,192) ($3,354,015) ($2,701,514) $19,259,721 $0 $0 $0 $0 $0 Re-Allocation to Fire Protection $0 $0 $0 $0 ($1,058,355) $1,058,355 $0 $0 $0 $0 Re-Alignment of Public and Private Fire $0 $0 $0 $0 $0 ($203,083) $0 $0 $203,083 $0 Final Cost Allocation $57,960,000 $22,271,781 $4,401,397 $3,354,015 $2,701,514 $18,299,036 $859,343 $6,283,217 $1,419,746 $203,083 ($1,833,132) Adjustments

42 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Allocation to Units
The final step of the COS analysis is to allocate the cost causative components back to the customers.

In order to perform this, unit values were determined for each cost component. Table 48 shows the number of systemwide units under each category. Equivalent meters are determined by multiplying the total meters by their equivalent meter value. Table 44 shows the meters currently connected to the water system and the number of equivalent meters based on AWWA meter equivalency factors.

Table 44. Total Equivalent Meters Used for Cost Allocation Meter Size Number of
Meters
Equivalance
Factor
Total
Equivalent
Meters
5/8" 5,561 1.00 5,561
3/4" 28,990 1.50 43,485
1" 7,141 2.50 17,853
1 1/2" 1,299 5.00 6,495
2" 1,253 8.00 10,024
3" 110 17.50 1,925
4" 162 31.50 5,103
6" 509 80.00 40,720
8" 494 140.00 69,160
10" 112 210.00 23,520
Total 45,631 223,846
All use categories (Water Use, Max Month, Average Day, Max Day, and Peak Hourly) were calculated based on actual (billed) customer use and are expressed in hcf. As previously described, average day demand constitutes the entire year of use divided by the number of days in a year. Max day demand takes the use during the highest use month (September) and divides that by the number of days in the month (30). Peak hourly demand is estimated by taking the difference between average day and max day demand and multiplying the result by a factor of 1.5. This results in the total capacity, with extra capacity calculated by subtracting the average daily use from the total capacity for either max day or max hour. Table 45 shows the water use values used to calculate units for the cost of service allocation. Table 46 shows the percent of total peak costs allocated to each tier based on the total capacity difference and extra capacity within that tier based on actual use patterns.

43 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 45. Total Use and Peak Values used for Cost Allocation Customer Class Annual Use
(hcf)
Daily Potable
Use
Capacity
Factor
Total
Capacity Extra Capacity Capacity Factor
Total
Capacity
Extra
Capacity
Residential Single Family - Potable 7,533,472 20,640 1.36 28,103 7,463 2.04 42,154 14,051 Residential Multi-Family - Potable 1,173,134 3,214 1.12 3,599 385 1.68 5,399 1,800 Commercial - Potable 1,054,265 2,888 1.21 3,498 609 1.82 5,247 1,749 Governmental - Potable 173,504 475 1.45 688 212 2.17 1,032 344 Industrial - Potable 369,960 1,014 1.25 1,271 258 1.88 1,907 636 Residential Single Family - Landscape 30,867 85 1.53 129 45 2.29 194 65 Residential Multi-Family - Landscape 31,755 87 1.70 148 61 2.56 222 74 Commercial - Landscape 845,627 2,317 1.58 3,667 1,350 2.37 5,500 1,833 Governmental - Landscape 296,537 812 1.61 1,311 499 2.42 1,967 656 Industrial - Landscape 26,955 74 1.49 110 36 2.24 165 55 Commercial - Hydrant - - - - - - - -
Governmental - Hydrant - - - - - - - -
Public Fire - - - 1,123 1,123 - 6,738 5,615
Total 11,536,076 31,606 43,648 12,042 70,525 26,877
Max Day Peak Hour
Table 46. Tier Use and Peak Values used for Cost Allocation11 Tier Annual Use
(hcf)
Daily
Potable Use
Capacity
Factor
Total
Capacity
Extra
Capacity
Capacity
Factor
Total
Capacity
Extra
Capacity
Percent of
Peak Costs
Tier 1 3,990,752 10,934 1.07 11,701 767 1.61 17,551 5,850 13.7% Tier 2 5,756,614 15,772 1.58 24,943 9,172 2.37 37,415 12,472 61.5% Tier 3 1,133,262 3,105 1.68 5,203 2,098 2.51 7,805 2,602 13.6% Tier 4 655,449 1,796 2.04 3,665 1,869 3.06 5,497 1,832 11.3% Total 11,536,076 31,606 45,512 13,906 68,268 22,756 100% Max Day Peak Hour
The number of bills in one year (the number of accounts multiplied by 12) serves as the basis for distributing billing and customer service costs associated with meter reading, customer billing and collection, and other customer services costs. The number of equivalent meters is used to distribute meter related service costs. Fire flow and duration estimates from the M1 Manual were utilized to allocate public fire costs to each customer class. Table 47 shows the total fire flow by customer class, where the total customers in each class were multiplied by the total flow and duration. 11 Note that the differences in capacity for each tier are different than the overall capacity differences within a customer class because of the volatility of use in the upper tiers, so the ratio of capacity is used to apply costs to each tier.

44 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 47. Estimated Fire Flow by Customer Class
Fire Service Demands by Customer Class HCF
Customer Class Customers Max Fire Flow Duration Fire Service Demands Residential Single Family - Potable 37,167 1,500 120 8,943,930 Residential Multi-Family - Potable 3,867 2,500 120 1,550,936 Commercial - Potable 1,549 3,000 240 1,491,016
Governmental - Potable 156 3,000 240 150,160
Industrial - Potable 649 3,500 240 728,824
Residential Single Family - Landscape 33 1,500 240 15,882 Residential Multi-Family - Landscape 10 2,500 240 8,061 Commercial - Landscape 567 3,000 240 545,775
Governmental - Landscape 231 3,000 240 222,353
Industrial - Landscape 24 3,500 240 26,952
Commercial - Hydrant 52 3,000 240 50,053
Total FP Units 44,305 13,733,944
Table 48 shows the sum of systemwide units used to derive unit costs for each cost category.

Table 48. Cost of Service Units
Unit Count of
Units
Count Less Fire
Allocation
Bills 547,573 547,573
Equivalent Meters 223,846 85,778
Water Use 11,536,076 11,536,076
Max Month 1,277,061 1,277,061
Average Day 31,606 31,606
Max Day 43,648 42,525
Max Day Extra 12,042 10,919
Peak Hourly 70,525 63,787
Peak Hour Extra 26,877 21,262
Fire Flow 13,733,944 -
Table 49 shows the total cost allocation by cost component divided by the corresponding unit values to develop a unit cost for each. Max Day Demand and Peak Hourly Demand costs are divided by the extra demand at each level to account for the additional use in that category and applied to each class and tier.

45 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 49. Rate Revenue Requirements Divided by the Corresponding Units Total Source of
Supply Base MDD PHD
Rate Revenue Requirement $57,960,000 $22,271,781 $4,401,397 $3,354,015 $2,701,514 Units 11,536,076 11,536,076 10,919 21,262
Unit Cost $1.93 $0.38 $307.16 $127.06
Meters Customer
Service
Conservation Private Fire Revenue Offset
Rate Revenue Requirement $18,299,036 $6,283,217 $1,419,746 $203,083 ($1,833,132) Units 85,778 547,573 11,536,076 - 11,536,076
Unit Cost $213.33 $11.47 $0.12 $203,083 ($0.16)
Public Fire
Indirect
Rate Revenue Requirement $859,343
Units 13,733,944
Unit Cost $0.06
Allocation to Customer Classes
The City currently maintains 13 distinct customer classes, though each individual customer receives a water budget, so rates are determined based on the total cost of service and divided by the requirements of each customer. The total units of service by customer class are shown in Table 50. Table 51 shows the cost of service allocated to each customer class based on the units of service. The total rate revenue requirements which need to be recovered from customers is also shown, this amount includes the cost of service allocation and the non-operating revenues (offsets) which are applied directly to the variable rates. The total revenue requirements reflect the final cost allocation in Table 43Table 43.

46 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 50. Unit of Service by Customer Class
$1.93 $0.38 $307.16 $127.06 $213.33 $203,082.89 $11.47 $0.12 ($0.16) $0.06 Customer Class Source of
Supply Base MDD PHD Meters Private Fire Customer
Service Conservation Revenue
Offset
Public Fire
Indirect
Residential Single Family - Potable 7,533,472 7,533,472 7,463 14,051 60,107 446,004 7,533,472 7,533,472 8,943,930 Residential Multi-Family - Potable 1,173,134 1,173,134 385 1,800 8,757 46,404 1,173,134 1,173,134 1,550,936 Commercial - Potable 1,054,265 1,054,265 609 1,749 7,343 18,588 1,054,265 1,054,265 1,491,016 Governmental - Potable 173,504 173,504 212 344 1,126 1,872 173,504 173,504 150,160 Industrial - Potable 369,960 369,960 258 636 3,089 7,788 369,960 369,960 728,824 Residential Single Family - Landscape 30,867 30,867 45 65 127 396 30,867 30,867 15,882 Residential Multi-Family - Landscape 31,755 31,755 61 74 80 121 31,755 31,755 8,061 Commercial - Landscape 845,627 845,627 1,350 1,833 2,986 6,804 845,627 845,627 545,775 Governmental - Landscape 296,537 296,537 499 656 886 2,772 296,537 296,537 222,353 Industrial - Landscape 26,955 26,955 36 55 144 288 26,955 26,955 26,952 Commercial - Hydrant 0 0 0 0 1,100 624 0 0 50,053
Governmental - Hydrant 0 0 0 0 35 24 0 0 0
Private Fire 138,068 15,888
Total 11,536,076 11,536,076 10,919 21,262 85,778 138,068 547,573 11,536,076 11,536,076 13,733,944 Table 51. Cost of Service by Customer Class
Customer Class Total Source of
Supply Base MDD PHD Meters Private
Fire
Customer
Service Conservation Revenue Offset
Public Fire
Indirect
Residential Single Family - Potable $39,726,386 $14,544,273 $2,874,271 $2,292,453 $1,785,314 $12,822,652 $0 $5,117,751 $927,145 -$1,197,101 $559,628 Residential Multi-Family - Potable $5,514,984 $2,264,876 $447,590 $118,355 $228,660 $1,868,028 $0 $532,471 $144,378 -$186,416 $97,043 Commercial - Potable $4,682,182 $2,035,385 $402,237 $187,170 $222,204 $1,566,379 $0 $213,291 $129,748 -$167,527 $93,294 Governmental - Potable $774,871 $334,970 $66,198 $65,248 $43,693 $240,103 $0 $21,481 $21,353 -$27,571 $9,396 Industrial - Potable $1,796,023 $714,252 $141,152 $79,166 $80,764 $658,978 $0 $89,365 $45,531 -$58,788 $45,603 Residential Single Family - Landscape $124,671 $59,592 $11,777 $13,682 $8,202 $26,986 $0 $4,544 $3,799 -$4,905 $994 Residential Multi-Family - Landscape $119,567 $61,307 $12,116 $18,823 $9,420 $17,152 $0 $1,384 $3,908 -$5,046 $504 Commercial - Landscape $3,321,829 $1,632,585 $322,635 $414,729 $232,954 $637,005 $0 $78,074 $104,071 -$134,374 $34,150 Governmental - Landscape $1,146,235 $572,500 $113,139 $153,195 $83,296 $189,011 $0 $31,808 $36,495 -$47,121 $13,913 Industrial - Landscape $115,268 $52,040 $10,284 $11,192 $7,006 $30,720 $0 $3,305 $3,317 -$4,283 $1,686 Commercial - Hydrant $244,849 $0 $0 $0 $0 $234,557 $0 $7,160 $0 $0 $3,132 Governmental - Hydrant $7,742 $0 $0 $0 $0 $7,467 $0 $275 $0 $0 $0 Private Fire $385,393 $0 $0 $0 $0 $0 $203,083 $182,310 $0 $0 $0 Total $57,960,000 $22,271,781 $4,401,397 $3,354,015 $2,701,514 $18,299,036 $203,083 $6,283,217 $1,419,746 ($1,833,132) $859,343

47 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

3.3 Water Rate Design
RDN proposes the following adjustments to customer water rate structures:
• Adjusting rates annually by the recommended revenue adjustments of 9.0 percent per year • Increasing the fixed proportion of rate collection
• Reducing the indoor allocation based on State regulations • Removing the highest cost tier to simplify the rate structure The water rates have two components: 1) a fixed monthly service charge and 2) volumetric rates.

Customers must pay the fixed charge regardless of the water use. In addition, the customers pay volumetric rates based on the volume of water use.

1. Fixed monthly service charge: the rates are established based on the size of the meter at the property receiving water service and are calculated to recover a portion of the City’s fixed costs, such as water facilities repairs and replacements, meter reading, and customer service.

2. Variable rates: the rates are calculated based on the cost of water supplies, the cost of managing the City’s water resources at regular and peak use and distributing water throughout the system to customers. The remaining fixed costs that are not recovered via fixed charges are also recovered from variable charges. The rates are billed per hundred cubic feet.

Together, the two components (fixed and variable) are calculated to recover the proportionate cost of providing water service attributable to each customer. Table 52 shows the costs which are allocated to either fixed or variable rates. The revenue offset is made up of non-operating revenues which will be collected in the test year and primarily includes interest.

48 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 52. Allocation of Fixed and Variable Costs12
Monthly Fixed Charge
All meter costs are divided by the number of equivalent meters using the AWWA ratio discussed in the Key Assumptions section to compute the unit cost for each cost component. Customer service costs are simply divided by the number of bills since the service requirements of this cost type are the same regardless of the meter size installed on a property. Table 53 shows the total costs allocated to each cost category, the number of units for the category, and the cost for a year and a month of service for each cost unit. The resulting monthly unit costs are used to calculate the fixed customer rates.

Table 53. Fixed Cost Components Divided by Number of Units Cost Units Cost
per Unit
Cost per
Month
Meter and Public Fire $19,158,379 85,778 $223.35 $18.61 Service $6,283,217 45,631 $137.70 $11.47
Table 54 shows the monthly fixed charge calculation by meter size for water service customer connections.
12 Revenue offsets are the direct use of non-operating revenues shown in table 23 to offset variable rates Expense Category Fixed Variable
Source of Supply $22,271,781
Base $4,401,397
MDD $3,354,015
PHD $2,701,514
Meters $18,299,036
Private Fire $203,083
Public Fire $859,343
Customer Service $6,283,217
Conservation $1,419,746
Revenue Offset -$1,833,132

49 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 54. Monthly Water Service Fixed Charge Calculation13 Meter
Size
Meter
Charge
Meter
Ratio
Total
Meter
Customer
Service
Monthly
Rate
5/8" $18.61 x 1.00 = $18.61 + $11.47 = $30.09
3/4" $18.61 x 1.50 = $27.92 + $11.47 = $39.39
1" $18.61 x 2.50 = $46.53 + $11.47 = $58.01
1 1/2" $18.61 x 5.00 = $93.06 + $11.47 = $104.54
2" $18.61 x 8.00 = $148.90 + $11.47 = $160.37
3" $18.61 x 17.50 = $325.72 + $11.47 = $337.19
4" $18.61 x 31.50 = $586.29 + $11.47 = $597.76
6" $18.61 x 80.00 = $1,488.99 + $11.47 = $1,500.47
8" $18.61 x 140.00 = $2,605.73 + $11.47 = $2,617.21
10" $18.61 x 210.00 = $3,908.60 + $11.47 = $3,920.08
The proposed monthly fixed charge before revenue adjustments for the base equivalent meter (5/8 inch) is $30.09 per month.

The proposed five-year monthly fixed charges with revenue adjustments applied for all water customers are shown in Table 55. FY 2025 rates are based on the cost of service rates times the revenue adjustment.

Table 55. Proposed 5-year Fixed Charge Schedule
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Proposed Adjustment 9.0% 9.0% 9.0% 9.0% 9.0%
Meter Size FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
5/8" $32.79 $35.75 $38.96 $42.47 $46.29
3/4" $42.94 $46.80 $51.02 $55.61 $60.61
1" $63.23 $68.92 $75.12 $81.88 $89.25
1 1/2" $113.94 $124.20 $135.38 $147.56 $160.84
2" $174.81 $190.54 $207.69 $226.38 $246.75
3" $367.54 $400.62 $436.67 $475.97 $518.81
4" $651.56 $710.20 $774.12 $843.79 $919.74
6" $1,635.51 $1,782.70 $1,943.15 $2,118.03 $2,308.65
8" $2,852.76 $3,109.51 $3,389.36 $3,694.40 $4,026.90
10" $4,272.88 $4,657.44 $5,076.61 $5,533.51 $6,031.52
Monthly Fire Fixed Charge
All meter costs are divided by the number of equivalent meters using the AWWA fire ratio discussed in the Key Assumptions section to compute the unit cost for each cost component. Customer service costs 13 Note that some calculations may be impacted by rounding to two decimal points

50 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study are simply divided by the number of bills since the service requirements of this cost type are the same regardless of the meter size installed on a property. Table 56 shows the total costs allocated to each cost category, the number of units for the category, and the cost for a year and a month of service for each cost unit. The resulting monthly unit costs are used to calculate the fixed customer rates.

Table 56. Fixed Cost Components Divided by Number of Units Cost Units Cost
per Unit
Cost per
Month
Meter $203,083 138,068 $1.47 $0.12
Service $6,283,217 45,631 $137.70 $11.47
Table 57 shows the monthly fixed charge calculation by meter size for water service customer connections. FY 2025 rates are based on the cost of service rates times the revenue adjustment.

Table 57. Monthly Water Service Fixed Charge Calculation14 Meter
Size
Meter
Charge
Meter
Ratio
Total
Meter
Customer
Service
Monthly
Rate
5/8" $0.12 x 1.00 = $0.12 + $11.47 = $11.60
3/4" $0.12 x 1.00 = $0.12 + $11.47 = $11.60
1" $0.12 x 1.00 = $0.12 + $11.47 = $11.60
1 1/2" $0.12 x 6.19 = $0.76 + $11.47 = $12.23
2" $0.12 x 17.98 = $2.20 + $11.47 = $13.68
3" $0.12 x 38.32 = $4.70 + $11.47 = $16.17
4" $0.12 x 111.31 = $13.64 + $11.47 = $25.12
6" $0.12 x 237.21 = $29.08 + $11.47 = $40.55
8" $0.12 x 426.58 = $52.29 + $11.47 = $63.76
10" $0.12 x 689.04 = $84.46 + $11.47 = $95.93
The proposed monthly fixed charge for the base equivalent meter (5/8 inch) is $11.60 per month.

The proposed five-year monthly fixed charges for all water customers are shown in Table 58:
14 Note that some calculations may be impacted by rounding to two decimal points

51 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 58. Proposed 5-year Fixed Charge Schedule
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Proposed Adjustment 9.0% 9.0% 9.0% 9.0% 9.0%
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
5/8" $12.64 $13.78 $15.02 $16.37 $17.84
3/4" $12.64 $13.78 $15.02 $16.37 $17.84
1" $12.64 $13.78 $15.02 $16.37 $17.84
1 1/2" $13.33 $14.53 $15.84 $17.27 $18.82
2" $14.91 $16.25 $17.71 $19.31 $21.05
3" $17.63 $19.21 $20.94 $22.83 $24.88
4" $27.38 $29.84 $32.53 $35.46 $38.65
6" $44.20 $48.18 $52.51 $57.24 $62.39
8" $69.50 $75.76 $82.57 $90.01 $98.11
10" $104.57 $113.98 $124.24 $135.42 $147.61
Variable Water Rates
Variable rates are designed based on variable costs such as water purchases, conservation, treatment, and base and peak delivery costs. The current rate structure was generally maintained to mitigate rate impacts, except the indoor budgets for residential customers was reduced based on the per capita water use standards being lowered by the State. Variable rates are made up of a number of cost components, all derived individually for each customer class: Water Supply, Base Costs, Peaking Costs, and Conservation Costs. Water supply costs are offset by the City’s non-operating revenues.

Water Supply
It is assumed that the City will utilize cheaper water sources before more expensive ones. The City’s cheapest water source is locally produced groundwater while purchased water is more expensive. The City’s available supply and costs are shown in Table 59. Additional supply costs identified in the cost of service analysis are included in each source based on the percentage of the total purchase costs. The unit cost for each water source is developed by dividing the total supply cost by the total available supply.

Table 59. Available Water Supply and Costs15
Water Source Produced
Supply (hcf)
Water Loss
(hcf)
Available
Supply
Allocated
Cost
Cost per
hcf
Local Production 5,068,012 506,801 4,561,211 $6,360,210 $1.39 Purchased Water 7,672,352 697,487 6,974,865 $15,911,571 $2.28 Proposed Tier Widths
15 Projected water supply costs and projected availability were provided by City engineering staff

52 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study The following formula displays a typical indoor water budget calculation for residential customers. RDN recommends that Gallons per Capita per Day (GPCD) should be reduced from 55 GPCD to 47 GPCD under the proposed rate structure to be consistent with the State upcoming requirements under AB 1668 and SB 606.

Indoor Water Budget (Residential Customers)
=
𝑮𝑷𝑪𝑫
𝟕𝟒𝟖 𝒈𝒂𝒍𝒍𝒐𝒏𝒔/𝒉𝒄𝒇 × 𝑯𝒐𝒖𝒔𝒆𝒉𝒐𝒍𝒅 𝑺𝒊𝒛𝒆 × # 𝒐𝒇 𝑫𝒘𝒆𝒍𝒍𝒊𝒏𝒈 𝑼𝒏𝒊𝒕𝒔 × 𝑫𝒂𝒚𝒔 𝒐𝒇 𝑺𝒆𝒓𝒗𝒊𝒄𝒆 Where:

GPCD – Gallons per Capita per Day, currently set at 55. RDN recommends setting GPCD at 47 under the proposed rates.

Household Size – Number of residents per dwelling unit, set at 4 for SFR customers unless a customer variance has been requested. The default household size for the proposed rates is set at 4 for SFR customers and 2 for MFR customers.

Dwelling Units – The number of dwelling units served by the meter. For example, a SFR customer’s number of dwelling unit is one.

Days of Service – Number of days of service varies with each billing cycle for each customer. The actual number of days of service will be applied to calculate the indoor water budget for each billing cycle. 748 is the conversion unit from gallons to a billing unit of one hundred cubic feet currently used by the City.

When using these default numbers to calculate a hypothetical SFR customer’s indoor water budget under the current rates in a hypothetical month (30 billing days), the water budget for this customer is 8.8 hcf a month. Decimal points, or portions of hcf are rounded up. In this hypothetical example, the calculated budget is 8.8 hcf, rounded up to 9 hcf.

Example for a SFR Indoor Water Budget (Current)
=
55 𝐺𝑃𝐶𝐷
748 𝑔𝑎𝑙𝑙𝑜𝑛𝑠/ℎ𝑐𝑓 × 4 𝑝𝑒𝑟𝑠𝑜𝑛𝑠 × 1 𝑢𝑛𝑖𝑡 × 30 𝑑𝑎𝑦𝑠 = 8.8 ℎ𝑐𝑓 RDN recommends reducing GPCD from 55 to 47 for the proposed rate structure. The following equation shows the proposed indoor allocation.

Example for a SFR Indoor Water Budget (Proposed)
=
47 𝐺𝑃𝐶𝐷
748 𝑔𝑎𝑙𝑙𝑜𝑛𝑠/ℎ𝑐𝑓 × 4 𝑝𝑒𝑟𝑠𝑜𝑛𝑠 × 1 𝑢𝑛𝑖𝑡 × 30 𝑑𝑎𝑦𝑠 = 7.5 ℎ𝑐𝑓

53 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study The data on the number of dwelling units for all MFR customers provided by staff and used in the same equation. The household size for MFR customers is set at 2. The proposed indoor allocation for a hypothetical MFR customer with an apartment complex with 20 units is computed as follows:

Example for a MFR Indoor Water Budget (Proposed)
=
47 𝐺𝑃𝐶𝐷
748 𝑔𝑎𝑙𝑙𝑜𝑛𝑠/ℎ𝑐𝑓 × 2 𝑝𝑒𝑟𝑠𝑜𝑛𝑠 × 20 𝑢𝑛𝑖𝑡𝑠 × 30 𝑑𝑎𝑦𝑠 = 75.4 ℎ𝑐𝑓 Under the current and proposed rate structure, residential customers’ outdoor water (Tier 2) budgets are calculated in the formula below.

Outdoor Water Budget for Residential Customers
=
𝑳𝒂𝒏𝒅𝒔𝒄𝒂𝒑𝒆 𝑨𝒓𝒆𝒂 (𝑰𝒓𝒓𝒊𝒈𝒂𝒃𝒍𝒆)16 ×
𝑬𝑻𝑶17
𝟏𝟐 𝒊𝒏/𝒇𝒕
𝟏𝟎𝟎 𝒔𝒇/𝒉𝒄𝒇 × 𝑳𝑭 × 𝑫𝑭
Where:

SFR customers’ irrigable area is equal to the actual irrigable area of each residential customer’s parcel.

Landscape Factor (LF) is set to 80% to the amount of water needed for irrigation to encourage conservation. This is consistent with the State of California Code of Regulations Title 23, Section 491 and an expected parameter to be used for LF under Assembly Bill No. 1668 (AB 1668) and Senate Bill No. 606 (SB 606), approved in May, 2018.

Drought Factor (DF) is currently set at 1. The City may apply this additional parameter to the equation if the State mandates reduction of water usage due to drought.

Example for Outdoor Water Budget for a Residential Customer (Current and Proposed) with 2,135 sf. Irrigable Landscape Area when ETO @ 10 inch
=
2,135 ×
10 12 𝑖𝑛/𝑓𝑡
100 𝑠𝑓/ℎ𝑐𝑓 × 0.8 × 1.0 = 14.2 ℎ𝑐𝑓
Example for Outdoor Water Budget for an Residential Customer (Current and Proposed) with 10,000 sf. Parcel Size with ETO @ 10 inch
=
10,000 ×
10 12 𝑖𝑛/𝑓𝑡
100 𝑠𝑓/ℎ𝑐𝑓 × 0.8 × 1.0 = 66.7 ℎ𝑐𝑓
16 Landscape Area (or Irrigable Area in square feet) is the measured irrigable landscape area served by a customer’s meter 17 Evapotranspiration (ET0) is measured in inches of water during the billing period based on actual ET from CIMIS weather station # 044.

54 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Commercial water budgets are based on a 3-year rolling average of historical use.

Use which is above a customer’s water budget is included in tier 3 and tier 4 for residential customers and tier 2 and tier 3 for all other customers. The allocation to each tier is based on a customer’s total water budget. The first tier above the proposed water budget contains as much water as 50 percent of the customer’s total water budget. The highest tier includes all water use which is greater than 150 percent of the total budget. The tier price for tier 1 for non-residential customers is equal to the tier 2 price of residential customers. Table 60 shows the tier allocations for each customer class as described.

Table 60. Tier Width Allocations by Customer Class
Customer
Class Tier Definition
Residential
Tier 1 Indoor Budget
Tier 2 Outdoor Budget
Tier 3 101-150% of Budget
Tier 4 Over 150% of Budget
Landscape
Tier 1 Total Budget
Tier 2 101-150% of Budget
Tier 3 Over 150% of Budget
Commercial, Industrial, Government
Tier 1 Total Budget
Tier 2 101-150% of Budget
Tier 3 Over 150% of Budget
Water Source Costs
All customers have a blend of all available water sources as shown in Table 61. For all customers, each inclining tier of water maximizes the cheapest available water supply source. The supply of available locally produced water is spent in the first two tiers, keeping the price lower for conservative water use.

Once locally produced water is no longer available, the upper two tiers are based on the supply cost of purchased water only.

Table 61. Water Source Unit Cost by Customer Class and Tier and Proposed Revenue Offset Tier Projected
Use
Local
Production
Purchased
Water Total Cost Unit Cost
Tier 1 3,990,752 3,990,752 $5,564,755 $1.39
Tier 2 5,756,614 570,459 5,186,155 $12,626,489 $2.19
Tier 3 1,133,262 1,133,262 $2,585,279 $2.28
Tier 4 655,449 655,449 $1,495,258 $2.28

55 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Variable Cost Components
Base Costs
Base costs are divided by total water use to determine the unit cost shown in Table 62. The base unit cost is applied to all water use.

Peaking
Peaking costs, the sum of MDD and PHD costs allocated to each customer class and tier as shown in Table 51 are multiplied by the percentages in Table 46 to allocate the costs to each tier which are then divided by total water use in each category to determine the unit cost shown in Table 62. The corresponding peaking unit cost is applied to all water use based on tier and customer class.

Conservation
Conservation costs are divided by total water use in tier 3 and tier 4 to determine the unit cost shown in Table 62. All customers will pay all conservation costs in the upper two tiers. The corresponding conservation cost is applied to all water use based on tier and customer class.

Revenue Offset
Revenue offsets are divided by total water use in tier 1 and tier 2 to determine the unit cost shown in Table 62. All customers benefit from the non-operating revenue for usage within their water budgets.

Table 62. Variable Rate Costs and Components as Allocated to each Tier Tier Water
Use Base Unit $ per hcf Peaking Unit $ per hcf Conservation Unit $ per hcf Revenue
Offset
Unit $
per hcf
Tier 1 3,990,752 $1,522,605 $0.38 $827,602 $0.21 $0 $0.00 -$750,518 -$0.19 Tier 2 5,756,614 $2,196,340 $0.38 $3,721,362 $0.65 $0 $0.00 -$1,082,614 -$0.19 Tier 3 1,133,262 $432,377 $0.38 $824,332 $0.73 $709,873 $0.63 $0 $0.00 Tier 4 655,449 $250,076 $0.38 $682,233 $1.04 $709,873 $1.08 $0 $0.00 Variable Rate Components
Table 63 shows the calculation used to determine the variable rates for each tier. Supply costs are added to peaking, conservation, and base costs to calculate the variable rates. Rates are then reduced by revenue offsets, which were set aside in the cost of service analysis.

Table 63. Variable Rate Calculation
Tier Supply
Cost
Base
Cost
Peaking
Cost
Conservation
Cost
Revenue
Offset
Variable
Rate
Tier 1 $1.39 + $0.38 + $0.21 + $0.00 - $0.19 = $1.80
Tier 2 $2.19 + $0.38 + $0.65 + $0.00 - $0.19 = $3.03
Tier 3 $2.28 + $0.38 + $0.73 + $0.63 - $0.00 = $4.02
Tier 4 $2.28 + $0.38 + $1.04 + $1.08 - $0.00 = $4.79

56 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study The rates will be escalated by the revenue adjustments and the five-year rate schedule is shown in Table 64. Each adjustment will occur in January, midway through the fiscal year.

Table 64. Proposed 5-Year Variable Rate Schedule
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Proposed Adjustment 9.0% 9.0% 9.0% 9.0% 9.0%
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Tier 1 $1.96 $2.13 $2.32 $2.53 $2.76
Tier 2 $3.31 $3.60 $3.93 $4.28 $4.67
Tier 3 $4.38 $4.77 $5.20 $5.67 $6.18
Tier 4 $5.22 $5.69 $6.20 $6.76 $7.36
Note: that fire hydrant and private fire rates reflect the peaking and source water cost of peak water use, residential tier 4

3.4 Bill Impact Analysis
This analysis compares customers’ bills under current and proposed rates. Figure 10 shows the dollar change in the bill based on ¾” meter single family residential customers, use at selected usage points.

The City’s average ¾” residential customer uses 13 hcf of water monthly. Additionally, the 90th percentile of use for a ¾” residential customer is under 31 hcf per billing period.

Figure 10. Single Family Customer Impact by Usage for ¾” Meter $49.97
$64.81
$86.97
$129.06
$56.64
$75.41
$101.86
$142.04
$0.00
$20.00
$40.00
$60.00
$80.00
$100.00
$120.00
$140.00
$160.00
7 hcf (25 percentile) 13 hcf (average) 21 hcf (75 percentile) 31 hcf (90 percentile) Current Proposed

57 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

RECLAIMED WATER UTILITY

4.1 Financial Plan
RDN built a 10-year financial model for the reclaimed water utility to meet the City’s long-term financial goals.

Demand Projections
Using historical billing records, RDN first derived aggregate usage levels to project water demand. Next, we calculated per account reclaimed water usage for each customer by dividing the aggregate usage by the number of accounts. RDN assumed constant per account usage over the study period. This assumption was introduced to ensure that forecasted deviation in the wake of the Covid-19 pandemic is conservative. Finally, the forecast number of accounts and per-account usage were multiplied to estimate aggregate use by customer class. Figure 11 shows the City’s total reclaimed water demand projected for the next ten years.

Figure 11. Annual Aggregate Reclaimed Water Use in hcf, FY 2024 to FY 2034

1.59 1.59 1.60 1.60 1.61 1.61 1.62 1.62 1.63 1.63 1.64

0.00 0.20

0.40 0.60

0.80 1.00

1.20 1.40

1.60 1.80
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Millions Residential Commercial Govermental Industrial

58 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 65 shows the annual reclaimed water use projection by customer class for the rate setting period.

Table 65. Annual Reclaimed Water Use by Customer Class in hcf, FY 2024 to FY 202918 Customer Class FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Residential 30,632 30,632 30,632 30,632 30,632 30,632
Commercial 451,598 451,598 451,598 451,598 451,598 451,598 Govermental 1,106,842 1,111,532 1,116,222 1,120,912 1,125,602 1,130,292 Industrial 149 149 149 149 149 149
Total 1,589,221 1,593,911 1,598,601 1,603,291 1,607,981 1,612,671 Revenues
Based on the account growth and water demand projections, RDN forecasted revenues generated from customer rates using the current water rates for the study period, which total approximately $4.4 million annually. Other operating income and non-operating revenue are estimated to provide supplemental revenue each year. Table 66 shows the projected non-operating revenue for the reclaimed water utility by source for FY 2024 to FY 2029.

Table 66. Annual Non-Operating Revenue by Source, FY 2024 to FY 2029 Non-Operating Revenue FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Interest On Investments $30,118 $30,720 $31,335 $31,961 $32,601 $33,253 Utility Locating & Marking $498 $498 $498 $498 $498 $498 Services To Other Funds $400 $400 $400 $400 $400 $400
Total $31,016 $31,618 $32,233 $32,859 $33,499 $34,151
The system’s total revenue for the study period is estimated to be approximately $5.3 to $5.4 million annually under the current rates. Table 67 shows the projected revenue flow for the study period (FY 2024 – FY 2029) without any revenue adjustments, projections are based on water use and customer growth projections as well as other operating and non-operating revenue estimates provided by City staff.

Table 67. Reclaimed Water Utility Operating Revenue Forecast, FY 2024 to FY 2029 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Revenue from Rates
Fixed Charges $680,000 $609,927 $610,909 $611,891 $612,873 $613,855 Variable Charges $3,722,000 $3,754,778 $3,765,587 $3,776,396 $3,787,204 $3,798,013 Rate Revenue Total $4,402,000 $4,364,705 $4,376,496 $4,388,286 $4,400,077 $4,411,868 Other Operating Revenues $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 Non-operating Revenues $31,016 $31,618 $32,233 $32,859 $33,499 $34,151 Total $5,337,688 $5,300,995 $5,313,400 $5,325,818 $5,338,248 $5,350,691 18 Use projections derived from historical monthly customer billing records and trends in reclaimed water use

59 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Operating and Maintenance (O&M) Expense
The reclaimed water utility’s operating budget includes $2.1 million in operating expenses for FY 2024.

By the end of the five-year rate setting period, total operating expenses are expected to reach $2.5 million.

Annual overall inflation for operating expenses for the ten-year financial planning period is expected to average around 3.6 percent per year. Table 68 shows projected operating expenses for the rate setting period by budget category.

Table 68. Operating Expenses by Expense Category, FY 2024 to FY 202919 Expense Category FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Capital Improvements $48,561 $52,658 $56,046 $59,660 $61,904 $64,232 General Service $214,130 $222,113 $230,417 $237,617 $244,457 $251,498 Regulatory Compliance $395,134 $408,979 $423,313 $435,109 $447,117 $459,457 Operations $862,585 $893,432 $925,437 $957,763 $989,923 $1,023,168 Infrastructure Maintenance $149,246 $156,491 $164,123 $171,622 $178,758 $184,850 Facilities Maintenance $364,218 $379,878 $395,260 $409,133 $422,633 $435,445 Conservation $4,757 $5,076 $5,419 $5,787 $6,009 $6,239
Customer Care $23,510 $29,659 $31,258 $32,875 $34,007 $35,174 Total Operating $2,062,141 $2,148,286 $2,231,273 $2,309,565 $2,384,807 $2,460,063 Other Obligations
Other obligations included in the financial plan are capital improvement projects funded by PAYGO (Pay As You Go), debt service obligations, and reserve contributions made from rates.

Capital Improvement Projects
The City plans to spend an average of $3.2 million a year on reclaimed water rate related capital expenditures during the rate setting period. An additional $1.6 million on average per year in reclaimed water capital expenditures will be funded by grants. The large initial expenditures on capital are projects that have already begun and in the outer years, total capital spending will be reduced to more normal levels. Table 69 shows the rate related capital expenditure by expenditure type. The City will use a variety of funding sources including grants and customer rates to accomplish the proposed capital plan. Figure 12 shows the rate study capital plan by funding source, only PAYGO funded expenditure will impact customer rates.
19 City staff provided current year operating expenses by category, projections are based on individual line-item inflationary factors shown in Table 14

60 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 69. Rate Study CIP Expenses by Expense Type, FY 2024 to FY 202920 CIP Funding Source FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Rate Funded $3,034,464 $6,576,445 $8,543,919 $303,925 $368,273 $225,068 Grant Funded $5,904,739 $3,495,461 $0 $0 $0 $0
Total CIP $8,939,203 $10,071,906 $8,543,919 $303,925 $368,273 $225,068 Figure 12. Rate Study CIP Expenses by Funding Source, FY 2024 to FY 2029 $0.0
$2.0
$4.0
$6.0
$8.0
$10.0
$12.0
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Millions
Rate Funded Grant Funded
Debt Service and Coverage Ratios
The City’s debt service schedule totals between $0.5 million and $2.4 million a year during the study period. Table 70 shows the annual debt service payments which are allocated to the reclaimed water fund.

Table 70. Reclaimed Water Fund Debt Service Payments, FY 2024 to FY 202921 Description FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Principal $2,125,225 $2,187,532 $2,250,562 $367,325 $386,187 $400,054 Interest $297,836 $239,652 $180,697 $119,776 $103,985 $88,762 Total reclaimed debt service $2,423,061 $2,427,184 $2,431,259 $487,100 $490,172 $488,816 Table 71 shows the DSCR under the current finances detailed in the previous tables. To derive the DSCR, net revenue is divided by the total debt service in each year. 20 The City’s 10-year CIP budget was used for project cost, project type, and funding source as well as input from staff 21 City staff provided details of all current and planned debt service obligations

61 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 71. Reclaimed Water Debt Service Coverage Ratio Calculation, FY 2024 to FY 2029 Description FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Total Revenue $5,337,688 $5,300,995 $5,313,400 $5,325,818 $5,338,248 $5,350,691 Total Operating Expense $2,062,141 $2,148,286 $2,231,273 $2,309,565 $2,384,807 $2,460,063 Net Revenue $3,275,547 $3,152,710 $3,082,128 $3,016,253 $2,953,441 $2,890,628 Total Reclaimed Debt Service $2,423,061 $2,427,184 $2,431,259 $487,100 $490,172 $488,816 Reclaimed DSCR 1.35 1.30 1.27 6.19 6.03 5.91
DSCR Requirement 1.25 1.25 1.25 1.25 1.25 1.25
Figure 13 shows the projected debt service coverage ratios based on the current financial plan.

Figure 13. Debt Service Coverage Ratio Under Current Rates, FY 2024 to FY 2029

0.00 1.00

2.00 3.00

4.00 5.00

6.00 7.00
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
DSCR Current DSCR Requirement
Reserves
The City must maintain an appropriate reserve balance to ensure the day-to-day operation will continue during emergencies and guarantee the future stability of the system. The City’s financial goal is to build an appropriate level of cash reserves for each reserve fund included in the financial plan of this Study.

Reserve target for the reclaimed water utility is described below:
• Operating Reserve: three months of operating expenses plus annual depreciation The reserve target at the end of the study period reaches $1.8 million. Table 72 shows the City’s reserve targets for FY 2024 through FY 2029 based on the current reserve policy. Figure 14 graphically displays the resulting cash balances versus the reserve target under the current rates. Reserve targets are based

62 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study on the reserve policy shown in Table 19 and operating, capital, and debt service totals shown in Tables 68, 69, and 70, respectively.

Table 72. Reclaimed Water Reserve Target, FY 2024 to FY 2029 Reserve Fund FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Operating Reserve $1,726,909 $1,748,445 $1,769,191 $1,788,765 $1,807,575 $1,826,389 Figure 14. Reclaimed Water Cash Balances and Reserve Target with Current Rates, FY 2024 to FY 2029
-$14.0
-$12.0
-$10.0
-$8.0
-$6.0
-$4.0
-$2.0
$0.0
$2.0
$4.0
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Millions
Ending Balance Reserve Target

63 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Financial Plan
Based on the projected total revenue and necessary costs to be recovered during the study period, RDN built a financial plan that will generate sufficient revenues for the day-to-day operation and annual PAYGO and make appropriate contributions to reserves. The City currently has a projected ending cash balance of $0.5 million in FY 2024. Table 73 shows the status quo reclaimed water pro forma with no revenue adjustments and the resulting ending balances based on the revenues and expenses outlined in this section.

Table 73. Status Quo Financial Pro Forma for City of Corona Reclaimed Water System, FY 2024 to FY 2029
Rate Increase 0.0% 0.0% 0.0% 0.0% 0.0%
Rate Month Implemented
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Cash Position Opening Balance $ 2,697,830 $ 515,852 $ (5,335,067) $ (13,228,117) $ (11,002,890) $ (8,907,894) Revenues
Reclaimed Water Rate Revenue $ 4,402,000 $ 4,364,705 $ 4,376,496 $ 4,388,286 $ 4,400,077 $ 4,411,868 Adjusted Reclaimed Water Rate Revenue $ - $ - $ - $ - $ - $ - Other Operating Revenue $ 904,672 $ 904,672 $ 904,672 $ 904,672 $ 904,672 $ 904,672 Non-Operating Revenue $ 31,016 $ 31,618 $ 32,233 $ 32,859 $ 33,499 $ 34,151 Total Revenues $ 5,337,688 $ 5,300,995 $ 5,313,400 $ 5,325,818 $ 5,338,248 $ 5,350,691 Operating Expenses $ 2,062,141 $ 2,148,286 $ 2,231,273 $ 2,309,565 $ 2,384,807 $ 2,460,063 Net Operating Revenues $ 3,275,547 $ 3,152,710 $ 3,082,128 $ 3,016,253 $ 2,953,441 $ 2,890,628 Current Rate Funded Debt Service $ 2,423,061 $ 2,427,184 $ 2,431,259 $ 487,100 $ 490,172 $ 488,816 New Debt Service $ - $ - $ - $ - $ - $ -
Total Rate Funded Debt Service $ 2,423,061 $ 2,427,184 $ 2,431,259 $ 487,100 $ 490,172 $ 488,816 Total Operating and Debt Service $ 4,485,202 $ 4,575,469 $ 4,662,532 $ 2,796,666 $ 2,874,979 $ 2,948,879 Total Operating and Debt Net Revenues $ 852,486 $ 725,526 $ 650,869 $ 2,529,152 $ 2,463,269 $ 2,401,812 Capital Expenditure $ 8,939,203 $ 10,071,906 $ 8,543,919 $ 303,925 $ 368,273 $ 225,068 Debt Proceeds Proposed $ - $ - $ - $ - $ - $ -
Debt Proceeds New $ - $ - $ - $ - $ - $ -
Capacity Fee $ - $ - $ - $ - $ - $ -
Grants $ 5,904,739 $ 3,495,461 $ - $ - $ - $ -
Cash $ 3,034,464 $ 6,576,445 $ 8,543,919 $ 303,925 $ 368,273 $ 225,068 Alternate Fee $ - $ - $ - $ - $ - $ -
Net Income $ (2,181,978) $ (5,850,919) $ (7,893,050) $ 2,225,227 $ 2,094,996 $ 2,176,744 Ending Balance $ 515,852 $ (5,335,067) ($13,228,117) ($11,002,890) ($8,907,894) ($6,731,150)

64 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 74 shows the proposed reclaimed water pro forma for the study period with the recommended revenue adjustments per year. In order for the City to accomplish the stated financial goals, the City must increase revenues by 4.0 percent per year for the next five years. Additionally, the reclaimed water utility will issue two interfund loans, $8.0 million in FY 2025 and $6.0 million in FY 2026. These loans will be paid back over time but will not impact the debt service coverage calculations, as they are not from an outside lender. All revenue adjustments will occur in January of the Fiscal Year.

Table 74. Proposed Financial Pro Forma for City of Corona Reclaimed Water System, FY 2024 to FY 2029
Rate Increase 4.0% 4.0% 4.0% 4.0% 4.0%
Rate Month Implemented 1-Jan 1-Jan 1-Jan 1-Jan 1-Jan
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Cash Position Opening Balance $ 2,697,830 $ 515,852 $ 2,752,227 $ 89,231 $ 803,102 $ 1,582,132 Revenues
Reclaimed Water Rate Revenue $ 4,402,000 $ 4,364,705 $ 4,376,496 $ 4,388,286 $ 4,400,077 $ 4,411,868 Adjusted Reclaimed Water Rate Revenue $ - $ 87,294 $ 266,091 $ 453,012 $ 648,401 $ 852,619 Other Operating Revenue $ 904,672 $ 904,672 $ 904,672 $ 904,672 $ 904,672 $ 904,672 Non-Operating Revenue $ 31,016 $ 31,618 $ 32,233 $ 32,859 $ 33,499 $ 34,151 Total Revenues $ 5,337,688 $ 5,388,289 $ 5,579,491 $ 5,778,830 $ 5,986,649 $ 6,203,310 Operating Expenses $ 2,062,141 $ 2,148,286 $ 2,231,273 $ 2,309,565 $ 2,384,807 $ 2,460,063 Net Operating Revenues $ 3,275,547 $ 3,240,004 $ 3,348,219 $ 3,469,264 $ 3,601,842 $ 3,743,247 Current Rate Funded Debt Service $ 2,423,061 $ 2,427,184 $ 2,431,259 $ 487,100 $ 490,172 $ 488,816 New Debt Service $ - $ - $ 1,036,037 $ 1,964,367 $ 1,964,367 $ 1,964,367 Total Debt Service $ 2,423,061 $ 2,427,184 $ 3,467,295 $ 2,451,468 $ 2,454,539 $ 2,453,184 Total Operating and Debt Service $ 4,485,202 $ 4,575,469 $ 5,698,568 $ 4,761,033 $ 4,839,346 $ 4,913,246 Net Revenues $ 852,486 $ 812,820 $ (119,077) $ 1,017,796 $ 1,147,303 $ 1,290,063 Capital Expenditure $ 8,939,203 $ 10,071,906 $ 8,543,919 $ 303,925 $ 368,273 $ 225,068 Debt Proceeds Proposed $ - $ - $ - $ - $ - $ -
Debt Proceeds New $ - $ 8,000,000 $ 6,000,000 $ - $ - $ - Capacity Fee $ - $ - $ - $ - $ - $ -
Grants $ 5,904,739 $ 3,495,461 $ - $ - $ - $ -
Cash $ 3,034,464 $ (1,423,555) $ 2,543,919 $ 303,925 $ 368,273 $ 225,068 Alternate Fee $ - $ - $ - $ - $ - $ -
Net Income $ (2,181,978) $ 2,236,375 $ (2,662,996) $ 713,871 $ 779,030 $ 1,064,995 Ending Balance $ 515,852 $2,752,227 $ 89,231 $803,102 $1,582,132 $2,647,128

65 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Revenue Requirements
Table 75 displays the reclaimed water utility’s revenue requirements for FY 2024. The total expense for each year is offset by other operating revenues and non-operating revenues to compute a pure portion of revenue requirements that need to be recovered from customers’ rates. RDN proposes annual revenue adjustments of 4.0 percent FY 2025 through FY 2029 to reach the financial goals set by the City.

Table 75. Revenue Requirements for City of Corona Reclaimed Water Utility, FY 2024 Revenue Requirements FY 2024
O&M Expenses $2,062,141
Debt Service $2,423,061
Capital Expenditures $3,034,464
Other Operating Revenue ($904,672)
Non-Operating Revenue ($31,016)
Net Balance From Operations ($2,181,978)
Rate Revenue Requirement $4,402,000

66 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

4.2 Cost of Service Analysis
The purpose of a Cost of Service (COS) analysis is to allocate costs among customers commensurate with their service requirements. RDN employed the “base-extra capacity” cost-of-service method promulgated in AWWA’s M1, whereby costs are first allocated to individual functions, which are typical industry standard activities, then the costs of each function are distributed to appropriate cost causative components, which are defined by the cost driving elements. The results of the COS form a reasonable, equitable basis for designing rates. Figure 15 displays a typical process for the COS analysis.

Figure 15. A Typical Flow for Cost of Service Analysis Process Functionalization of Costs
Operating and capital costs are functionalized based on operating categories used in the City’s budget and input from City staff with expertise on the system and utility industry knowledge. The functionalization of capital expenses is based on total reclaimed water asset values, which represents a better overall estimate of systemwide needs versus just one year of capital expenditure. The functions of the reclaimed water system for both operating and capital expenses include:
• Pumping – costs associated with general pumping and energy use • Storage – costs associated with water storage for distribution • Treatment – costs associated with treating water
• Transmission and Distribution – costs associated with transmitting and distributing reclaimed water to customers
• Customer – costs associated with customer service and billing related tasks • Meters – costs associated with the reading and maintenance of meters • Conservation – costs associated with the City’s conservation programs Functionalization
The revenue requirement is
assigned to various industry
standard activities on a line-by -
line basis.

Allocation to Cost Causative
Components
The functional categories are
allocated to base, Max Day
Demand, Peak Hourly Demand,
customer billing and meter costs.

Reallocation to Customers via
Rates
Each cost component is tied to
fixed and volumetric rate
components.

67 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study • Administrative and General – costs associated with administrative and general functions Costs were functionalized based on industry standard budget determinations and input from staff. Table 76 shows the amount and percentage of test year operating expenses allocated to each function. City assets are categorized based on function as described in the City’s audited financial statements. Table 77 shows the amount and percentage of the City’s fixed assets allocated to each function. Total assets were used as a proxy for the allocation of non-operating expenses because they represent the long-term investment in the system made by the City. A single year of non-operating expenses typically does not reflect an adequate ratio of overall system values.

Table 76. Percentage of Operating Costs Allocated to Standard Functions22 Category Allocation Percent
Total O&M $2,062,141 100.0%
Transmission and Distribution $149,246 7.2%
Pumping $712,551 34.6%
Customer $23,510 1.1%
Conservation $4,757 0.2%
Administrative and General $1,172,077 56.8%
O&M Expense
Table 77. Percentage of Non-operating Costs Allocated to Standard Functions Category Allocation Percent
Total Assets $73,913,263 100.0%
Storage $20,032,521 27.1%
Transmission and Distribution $45,706,630 61.8%
Pumping $7,676,852 10.4%
Meters $47,498 0.1%
Administrative and General $449,761 0.6%
Non-Operating Expense
A COS analysis considers both the average quantity of water consumed (base costs) and the peak rate at which it is consumed (peaking or capacity costs as identified by maximum day and maximum hour demands). Peaking costs are costs that are incurred during peak times of consumption. There are additional costs associated with designing, constructing, operating, and maintaining facilities to meet peak demands. All current and future reclaimed water facilities, including water mains, and pump stations are designed and constructed to meet peak demands. If deficiencies are found, the existing facilities get upsized, or a secondary line or pump is installed to meet the peaking demands. Peak demand costs should be allocated to those customers whose water usage patterns generate additional costs for the utility. In other words, not all customer classes and not all customers share the same responsibility for 22 Cost allocations were provided for all expenses by City staff based on the standard cost categories

68 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study peaking related costs. For the system to provide adequate service to its customers at all times, it must be capable of meeting not only the annual volume requirements, but also the peak demand - the maximum rate at which water is consumed. Therefore, the capacities of the various facilities must meet the maximum coincidental demand of all customers.

Each reclaimed water service facility within the system has an underlying average demand, exerted by the customers for whom the base cost component applies. For those facilities designed solely to meet average daily demand, 100% of the cost should go to the base cost component. Extra capacity requirements associated with demand in excess of average use consist of Max Day Demand and Peak Hourly Demand. Base demand and MDD demand were calculated based on historical customer usage for the most recent year that data was fully available, FY 2023. Base demand was calculated as the total demand divided by the number of days in a year. Max Day Demand was calculated by taking the highest use month, September, and dividing that by the number of days in the month, 30. Based on the MDD factor, RDN estimated the average hourly flow during the max day by multiplying it by a peaking factor of

1.5 (the lowest factor recommended by the State Board’s Division of Drinking Water23) to compute a PHD factor. Functions that require capacity to perform at base and MDD levels were allocated based on the ratio of base demand compared to MDD, or 65.8 percent and 34.2 percent, respectively. Additionally, the costs associated with the functions which require extra capacity service requirements were distributed to the base, MDD, and PHD cost components at 54.8 percent, 28.5 percent, and 16.7 percent, respectively.

Table 78 shows the systemwide peaking factors based on customer use patterns as described.

Table 78. System-Wide Peaking Factors
Factor Base Max Day Max Hour
Use 4,379 6,658 9,987
Base 1.00 100.0% 0.0% 0.0%
Max Day 1.52 65.8% 34.2% 0.0%
Max Hour 2.28 43.8% 22.8% 33.3%
Average Max Day/Max Hour 54.8% 28.5% 16.7%
The cost causative components include:
• Base – delivering water to customers under average demand conditions • Maximum Day Demand (MDD) – the costs of delivering water to customers on the day with the highest demand
• Peaking Hourly Demand (PHD) – the costs of delivering water to customers on the hour with the highest demand on highest day
• Meters – the costs of servicing and reading meters
23 California Public Utilities Commission. Standard Practice for Determination of Water Supply Requirements, Standard Practice U-22. San Francisco. 2000

69 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study • Customer Service – billing and other customer service-related costs • Conservation – the cost to administer the City’s conservation program Pumping costs are proportionally allocated between Base, Max Day, and Peak Hour based on the average max day/peak hour allocation or in the case of assets are applied directly to supply costs as the total water supply for reclaimed water is brought into the system from outside treatment.

Transmission and distribution costs are proportionally allocated between Base, Max Day, and Peak Hour based on the Average Max Day/Peak Hour costs. These costs are allocated based on the average maximum day and maximum hour because transmission infrastructure is constructed to meet maximum day demand and distribution pipelines are constructed to meet maximum hour demand.

Administrative and general costs are allocated to cost components based on the percentage of the functions allocated to the other cost categories.

The result of the COS analysis determines how the total revenue requirements should be allocated to each of the cost components, which are categorized and grouped based on the similar cost driving elements. Table 79 through Table 82 show the percent and total value of functionalized operating costs and assets allocated to the cost causative components. Asset values provide a more stable estimate of overall capital needs and thus, the allocation used is based on asset values. The percentage of system assets under each cost component is then applied to the non-operating revenue requirements for the test year.

70 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 79. Percent of Operating Function Categories Allocated to Cost Components Category Total
Allocation
Source of
Supply Base MDD PHD Meters Customer Service Conservation Transmission and Distribution $149,246 0.0% 54.8% 28.5% 16.7% 0.0% 0.0% 0.0% Pumping $712,551 0.0% 54.8% 28.5% 16.7% 0.0% 0.0% 0.0%
Customer $23,510 0.0% 0.0% 0.0% 0.0% 0.0% 100.0% 0.0%
Conservation $4,757 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% 100.0% Administrative and General $1,172,077 0.0% 52.7% 27.4% 16.0% 0.0% 3.2% 0.6% O&M Expense
Table 80. Total of Operating Functional Categories Allocated to Cost Components Category Total
Allocation
Source of
Supply Base MDD PHD Meters Customer Service Conservation Transmission and Distribution $149,246 $0 $81,800 $42,572 $24,874 $0 $0 $0 Pumping $712,551 $0 $390,540 $203,253 $118,759 $0 $0 $0 Customer $23,510 $0 $0 $0 $0 $0 $23,510 $0
Conservation $4,757 $0 $0 $0 $0 $0 $0 $4,757
Administrative and General $1,172,077 $0 $617,889 $321,574 $187,892 $0 $37,196 $7,526 Percent of Total 100.0% 0.0% 52.9% 27.5% 16.1% 0.0% 2.9% 0.6% O&M Expense
Table 81. Percent of Non-Operating Function Categories Allocated to Cost Components Category Total
Allocation
Source of
Supply Base MDD PHD Meters Customer
Service Conservation
Storage $20,032,521 0.0% 65.8% 34.2% 0.0% 0.0% 0.0% 0.0% Transmission and Distribution $45,706,630 0.0% 54.8% 28.5% 16.7% 0.0% 0.0% 0.0% Pumping $7,676,852 100.0% 0.0% 0.0% 0.0% 0.0% 0.0% 0.0% Meters $47,498 0.0% 0.0% 0.0% 0.0% 100.0% 0.0% 0.0%
Administrative and General $449,761 0.0% 65.6% 34.1% 0.0% 0.2% 0.0% 0.0% Non-Operating Expense

71 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 82. Total of Non-Operating Functional Categories Allocated to Cost Components Category Total
Allocation
Source of
Supply Base MDD PHD Meters Customer Service Conservation Storage $20,032,521 $0 $13,175,478 $6,857,043 $0 $0 $0 $0 Transmission and Distribution $45,706,630 $0 $25,051,212 $13,037,647 $7,617,772 $0 $0 $0 Pumping $7,676,852 $7,676,852 $0 $0 $0 $0 $0 $0
Meters $47,498 $0 $0 $0 $0 $47,498 $0 $0
Administrative and General $449,761 $0 $295,110 $153,587 $0 $1,064 $0 $0 Percent of Total 100.0% 10.4% 52.1% 27.1% 10.3% 0.1% 0.0% 0.0% Non-Operating Expense
The non-operating expenses for the test year are made up of debt service payments and capital expenditures totaling approximately $5.5 million. Those costs are distributed to the cost components based on the final percentages shown in Table 82, above, which are based on the total asset values of reclaimed water assets owned by the City. Reclaimed water asset values represent the long-term investment in the City’s reclaimed water system and are proxy value for how a single year of non-operating expenses should be allocated. Asset values do not significantly fluctuate year over year as annual capital expenditures do, which ensures that cost categories are accurately represented. Operating allocations are based on the actual projected test year expenses and the total for each cost component reflect the percentages in Table 80. Table 83 shows the projected test year expenses allocated to each cost component based on the percentages in Table 80 and Table 82.

Table 83. Operating and Non-Operating Cost Allocation to Cost Components Cost Component Operating
Percentage
Operating
Costs
Non-Operating
Percentage
Non-Operating
Costs
Total 100.0% $2,062,141 100.0% $5,457,525
Source of Supply 0.0% $0 10.4% $566,835
Base 52.9% $1,090,228 52.1% $2,844,330
MDD 27.5% $567,398 27.1% $1,480,302
PHD 16.1% $331,525 10.3% $562,472
Meters 0.0% $0 0.1% $3,586
Customer Service 2.9% $60,706 0.0% $0
Conservation 0.6% $12,283 0.0% $0

72 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 84 shows the cost allocation by cost causative components under the proposed financial plan before adjustments. Revenue offsets made up of non-operating revenues for FY 2024 shown in Table 66 will be used to offset reclaimed water costs in the rate design section.

Other operating revenues are allocated to each cost component based on the overall cost allocation percentages shown in the “percent of total” row in Table 85.

Table 84. Rate Revenue Requirements for Test Year, FY 2024 Cost Allocation Summary Total Source of
Supply Base MDD PHD Meters Customer Service Conservation O&M Revenue Requirements $2,062,141 $0 $1,090,228 $567,398 $331,525 $0 $60,706 $12,283 Non-Operating Revenue Requirements $5,457,525 $566,835 $2,844,330 $1,480,302 $562,472 $3,586 $0 $0 Total $7,519,666 $566,835 $3,934,558 $2,047,700 $893,998 $3,586 $60,706 $12,283 Because they are a function of system capacity, base costs are reallocated to the meter component at a rate of 30.0 percent which will help stabilize revenues by increasing the fixed revenue collection. Utilities invest in, and continuously maintain, facilities to provide capacity to meet all levels of water consumption, including average and peak demand. These costs must be recovered regardless of the amount of water used during a given period. Thus, base delivery costs and fixed reclaimed water system costs to meet average demand are generally considered as fixed reclaimed water system costs. To balance affordability and revenue stability, it is a common practice that a portion of the base costs and/or peaking costs are recovered in the monthly service charge, along with customer-related costs and meterrelated costs. Table 85 shows the total cost allocation by cost category that will be used to allocate costs to each customer class. Other operating revenues are allocated to cost components based on the overall allocation percentages shown in the percent of total line.

Additionally, non-operating revenues, interest on investments, are applied directly to offset variable rates.

73 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 85. Final Cost of Service Allocations with all Adjustments Cost Allocation Summary Total Source of
Supply Base MDD PHD Meters Customer Service Conservation Revenue Offset O&M Revenue Requirements $2,062,141 $0 $1,090,228 $567,398 $331,525 $0 $60,706 $12,283 $0 Non-Operating Revenue Requirements $5,457,525 $566,835 $2,844,330 $1,480,302 $562,472 $3,586 $0 $0 $0 Total $7,519,666 $566,835 $3,934,558 $2,047,700 $893,998 $3,586 $60,706 $12,283 $0 Percent of Total 7.5% 52.3% 27.2% 11.9% 0.0% 0.8% 0.2% 0.0% Other Operating Revenue ($904,672) ($68,194) ($473,357) ($246,354) ($107,555) ($431) ($7,303) ($1,478) $0 Non-Operating Revenue ($31,016) $0 $0 $0 $0 $0 $0 $0 ($31,016) Net Balance From Operations ($2,181,978) ($164,478) ($1,141,689) ($594,180) ($259,411) ($1,040) ($17,615) ($3,564) $0 Rate Revenue Requirement $4,402,000 $334,162 $2,319,512 $1,207,166 $527,032 $2,114 $35,788 $7,241 ($31,016) Adjustments
Re-Allocation of Base $0 ($695,854) $0 $0 $695,854 $0 $0 $0 Final Cost Allocation $4,402,000 $334,162 $1,623,659 $1,207,166 $527,032 $697,968 $35,788 $7,241 ($31,016)

74 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Allocation to Units
The final step of the COS analysis is to allocate the cost causative components back to the customers.

In order to perform this, unit values were determined for each cost component. Equivalent meters are determined by multiplying the total meters by their equivalent meter value. Table 86 shows the meters currently connected to the reclaimed water system and the number of equivalent meters based on AWWA meter equivalency factors.

Table 86. Total Equivalent Meters Used for Cost Allocation Meter Size Number of
Meters
Equivalance
Factor
Total
Equivalent
Meters
5/8" - 1.00 -
3/4" 16 1.50 24
1" 81 2.50 203
1 1/2" 169 5.00 845
2" 87 8.00 696
3" 12 17.50 210
4" 14 31.50 441
6" 6 80.00 480
8" 1 140.00 140
10" 1 210.00 210
Total 387 3,249
All use categories (Water Use, Max Month, Average Day, Max Day, and Peak Hourly) were calculated based on actual (billed) customer use and are expressed in hcf. As previously described, average day demand constitutes the entire year of use divided by the number of days in a year. Max day demand takes the use during the highest use month (September) and divides that by the number of days in the month (30). Peak hourly demand is estimated by taking the difference between average day and max day demand and multiplying the result by a factor of 1.5. This results in the total capacity, with extra capacity calculated by subtracting the average daily use from the total capacity for either max day or max hour. Table 87 shows the reclaimed water use values used to calculate units for the cost of service allocation. Table 88 shows the percent of total peak costs allocated to each tier based on the total capacity difference and extra capacity within that tier based on actual use patterns.

75 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 87. Total Use and Peak Values used for Cost Allocation Customer Class Annual Use
(hcf)
Daily
Reclaimed
Use
Capacity
Factor
Total
Capacity Extra Capacity Capacity
Factor
Total
Capacity Extra Capacity
Residential 30,632 84 1.72 145 61 2.59 218 73
Commercial 451,598 1,241 1.69 2,101 861 2.54 3,152 1,051 Governmental 1,111,532 3,054 1.44 4,411 1,357 2.17 6,616 2,205 Industrial 149 0.4 1.84 0.8 0.3 2.76 1.1 0.4
Total 1,593,911 4,379 6,658 2,279 9,987 3,329
Max Day Peak Hour
Table 88. Total Use and Peak Values used for Cost Allocation to Tiers by Percent Tier Annual
Use (hcf)
Daily
Reclaimed
Use
Capacity
Factor
Total
Capacity
Extra
Capacity
Capacity
Factor
Total
Capacity
Extra
Capacity
Percent
of Peak
Costs
Tier 1 1,425,082 3,915 1.50 5,890 1,975 2.26 8,836 2,945 88.0% Tier 2 168,830 464 1.60 742 279 2.40 1,114 371 12.0%
Total 1,593,911 4,379 6,633 2,254 9,949 3,316 100%
Max Day Peak Hour
The number of bills in one year (the number of accounts multiplied by 12) serves as the basis for distributing billing and customer service costs associated with meter reading, customer billing and collection, and other customer services costs. The number of equivalent meters is used to distribute meter related service costs. Table 89 shows the total cost of service units used to derive the unit costs under each category.

Table 89. Cost of Service Units
Unit Count of
Units
Customers 387
EMs 3,249
Reclaimed Water Use 1,593,911
Max Month 204,146
Average Day (hcf/day) 4,379
Max Day (hcf/day) 6,658
Max Day Extra 2,279
Peak Hourly (hcf/day) 9,987
Peak Hour Extra 3,329
Table 90 shows the total cost allocation by cost component divided by the corresponding unit values to develop a unit cost for each. Max Day Demand and Peak Hourly Demand costs are divided by the extra demand at each level to account for the additional use in that category and applied to each class and tier.

76 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 90. Rate Revenue Requirements Divided by the Corresponding Units Total Source of
Supply Base MDD PHD Meters Customer Service Conservation Revenue Offset Rate Revenue Requirement $4,402,000 $334,162 $1,623,659 $1,207,166 $527,032 $697,968 $35,788 $7,241 ($31,016) Units 1,593,911 1,593,911 2,279 3,329 3,249 4,642 1,593,911 1,593,911 Unit Cost $0.21 $1.02 $529.70 $158.32 $214.86 $7.71 $0.005 ($0.02) Allocation to Customer Classes
The City currently maintains four distinct reclaimed water customer classes, though all customers are billed in the same manner, with individual water budgets. The total units of service by customer class are shown in Table 91. Table 92 shows the cost of service allocated to each customer class based on the units of service. The total rate revenue requirements which need to be recovered from customer rates is also shown, this amount is the cost of service allocation reduced by the non-operating revenues which are applied directly to the variable rates.

77 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 91. Unit of Service by Customer Class
$0.21 $1.02 $529.70 $158.32 $214.86 $7.71 $0.005 ($0.02) Customer Class Source of
Supply Base MDD PHD Meters Customer
Service Conservation Revenue Offset
Residential 30,632 30,632 61 73 174 120 30,632 30,632
Commercial 451,598 451,598 861 1,051 911 1,596 451,598 451,598 Governmental 1,111,532 1,111,532 1,357 2,205 2,156 2,914 1,111,532 1,111,532 Industrial 149 149 0 0 8 12 149 149
Total 1,593,911 1,593,911 2,279 3,329 3,249 4,642 1,593,911 1,593,911 Table 92. Cost of Service by Customer Class
Customer Class Total Source of
Supply Base MDD PHD Meters Customer Service Conservation Revenue Offset
Residential $119,223 $6,422 $31,204 $32,261 $11,483 $37,385 $925 $139 -$596 Commercial $1,378,283 $94,677 $460,026 $455,929 $166,345 $195,736 $12,305 $2,052 -$8,788 Governmental $2,902,259 $233,032 $1,132,277 $718,793 $349,145 $463,127 $22,464 $5,050 -$21,629 Industrial $2,235 $31 $152 $183 $60 $1,719 $93 $1 -$3
Total $4,402,000 $334,162 $1,623,659 $1,207,166 $527,032 $697,968 $35,788 $7,241 -$31,016

78 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

4.3 Reclaimed Water Rate Design
RDN proposes the following adjustments to customer reclaimed water rate structures:
• Adjusting rates annually by the recommended revenue adjustments of 4.0 percent per year • Increasing the fixed proportion of rate collection
• Reducing the number of tiers from four to two
The reclaimed water rates have two components: 1) a fixed monthly service charge and 2) volumetric rates. Customers must pay the fixed charge regardless of the water use. In addition, the customers pay volumetric rates based on the volume of water use.

3. Fixed monthly service charge: the rates are established based on the size of the meter at the property receiving water service and are calculated to recover a portion of the City’s fixed costs, such as water facilities repairs and replacements, meter reading, and customer service.

4. Variable rates: the rates are calculated based on the cost of water supplies, the cost of managing the City’s reclaimed water resources at regular and peak use and distributing water throughout the system to customers. The remaining fixed costs that are not recovered via fixed charges are also recovered from variable charges. The rates are billed per hundred cubic feet.

Together, the two components (fixed and variable) are calculated to recover the proportionate cost of providing water service attributable to each customer. Table 93 shows the costs which are allocated to either fixed or variable rates. The revenue offset is made up of non-operating revenues which will be collected in the test year and primarily includes interest income.

Table 93. Allocation of Fixed and Variable Costs24
Expense Category Fixed Variable
Source of Supply $334,162
Base $1,623,659
MDD $1,207,166
PHD $527,032
Meters $697,968
Customer Service $35,788
Conservation $7,241
Revenue Offset -$31,016
24 Revenue offsets are the direct use of non-operating revenues shown in table 66 to offset variable rates

79 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Monthly Fixed Charge
All meter costs are divided by the number of equivalent meters using the AWWA ratio discussed in the Key Assumptions section to compute the unit cost for each cost component. Customer service costs are simply divided by the number of bills since the service requirements of this cost type are the same regardless of the meter size installed on a property. Table 94 shows the total costs allocated to each cost category, the number of units for the category, and the cost for a year and a month of service for each cost unit. The resulting monthly unit costs are used to calculate the fixed customer rates.

Table 94. Fixed Cost Components Divided by Number of Units Cost Units Cost
per Unit
Cost per
Month
Meter $697,968 3,249 $214.86 $17.90
Service $35,788 387 $92.52 $7.71
Table 95 shows the monthly fixed charge calculation by meter size for reclaimed water service customer connections.

Table 95. Monthly Reclaimed Water Service Fixed Charge Calculation Meter
Size
Meter
Charge
Meter
Ratio
Total
Meter
Customer
Service
Monthly
Rate
5/8" $17.90 x 1.00 = $17.90 + $7.71 = $25.62
3/4" $17.90 x 1.50 = $26.86 + $7.71 = $34.57
1" $17.90 x 2.50 = $44.76 + $7.71 = $52.47
1 1/2" $17.90 x 5.00 = $89.52 + $7.71 = $97.23
2" $17.90 x 8.00 = $143.24 + $7.71 = $150.95
3" $17.90 x 17.50 = $313.34 + $7.71 = $321.05
4" $17.90 x 31.50 = $564.00 + $7.71 = $571.71
6" $17.90 x 80.00 = $1,432.39 + $7.71 = $1,440.10
8" $17.90 x 140.00 = $2,506.68 + $7.71 = $2,514.39
10" $17.90 x 210.00 = $3,760.02 + $7.71 = $3,767.73
The proposed monthly fixed charge for the base equivalent meter (5/8 inch) is $25.62 per month.

The proposed five-year monthly fixed charges for all reclaimed water customers are shown in Table 96.

80 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 96. Proposed 5-year Fixed Charge Schedule
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Proposed Adjustment 4.0% 4.0% 4.0% 4.0% 4.0%
Meter Size FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
5/8" $26.64 $27.70 $28.81 $29.96 $31.16
3/4" $35.95 $37.38 $38.88 $40.43 $42.05
1" $54.57 $56.75 $59.02 $61.38 $63.84
1 1/2" $101.12 $105.16 $109.37 $113.75 $118.30
2" $156.98 $163.26 $169.79 $176.58 $183.65
3" $333.88 $347.24 $361.13 $375.57 $390.60
4" $594.58 $618.36 $643.10 $668.82 $695.57
6" $1,497.70 $1,557.61 $1,619.91 $1,684.71 $1,752.10
8" $2,614.96 $2,719.56 $2,828.34 $2,941.48 $3,059.14
10" $3,918.44 $4,075.17 $4,238.18 $4,407.71 $4,584.02
Variable Reclaimed Water Rates
Variable rates are designed based on variable costs such as conservation and base and peak delivery costs. The current water budget rate structure was maintained to mitigate rate impacts, though the number of tiers was reduced from four to two. Variable rates are made up of a number of cost components, all derived individually for each customer class: Water Supply, Base Costs, Peaking Costs, and Conservation Costs. Water supply costs are offset by the City’s non-operating revenues.

Proposed Tier Widths
The following formula displays a typical water budget calculation for reclaimed water customers. Under the current and proposed rate structure, reclaimed water budgets are calculated in the formula below.

Water Budget for Reclaimed Water Customers
=
𝑳𝒂𝒏𝒅𝒔𝒄𝒂𝒑𝒆 𝑨𝒓𝒆𝒂 (𝑰𝒓𝒓𝒊𝒈𝒂𝒃𝒍𝒆)25 ×
𝑬𝑻𝑶26
𝟏𝟐 𝒊𝒏/𝒇𝒕
𝟏𝟎𝟎 𝒔𝒇/𝒉𝒄𝒇 × 𝑳𝑭 × 𝑫𝑭
Where:

Landscape Factor (LF) is set to 80% to the amount of water needed for irrigation to encourage conservation. This is consistent with the State of California Code of Regulations Title 23, Section 491 25 Landscape Area (or Irrigable Area in square feet) is the measured irrigable landscape area served by a customer’s meter 26 Evapotranspiration (ET0) is measured in inches of water during the billing period based on actual ET from CIMIS weather station # 044.

81 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study and an expected parameter to be used for LF under Assembly Bill No. 1668 (AB 1668) and Senate Bill No. 606 (SB 606), approved in May 2018.

Drought Factor (DF) is currently set at 1. The City may apply this additional parameter to the equation if the State mandates reduction of water usage due to drought.

Example for Reclaimed Water Budget (Tier 1) for (Current and Proposed) with 10,000 sf. Parcel Size with ETO @ 10 inch
=
10,000 ×
10 12 𝑖𝑛/𝑓𝑡
100 𝑠𝑓/ℎ𝑐𝑓 × 0.8 × 1.0 = 66.7 ℎ𝑐𝑓
Use which is above a customer’s water budget is included in tier 2. Tier 2 includes all water use which is greater than the total budget. Table 97 shows the current and proposed tier widths under the described water budget-based rates.

Table 97. Current and Proposed Reclaimed Water Tier Width Allocations Customer
Class
Tier Definition
Current
Tier Definition
Proposed
Reclaimed
Tier 1 Total Budget Total Budget
Tier 2 101-150% of Budget Use over Budget
Tier 3 151-200% of Budget N/A
Tier 4 Over 200% of Budget N/A
Variable Cost Components
Supply Costs
Supply costs are divided by total water use to determine the unit cost shown in Table 98. The base unit cost is applied to all water use.

Base Costs
Base costs are divided by total water use to determine the unit cost shown in Table 98. The base unit cost is applied to all water use.

Peaking
Peaking costs, the sum of MDD and PHD costs allocated to each tier are divided by total water use in each category to determine the unit cost shown in Table 98. The corresponding peaking unit cost is applied to all water use based on the tier percentage in Table 88.

82 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Conservation
Conservation costs are divided by total water use in tier 2 to determine the unit cost shown in Table 98.

All customers will pay all conservation costs in the upper tier. The corresponding conservation cost is applied to all water use in tier 2.

Revenue Offset
Revenue offsets are divided by total water use in tier 1 to determine the unit cost shown in Table 98. All customers benefit from the non-operating revenue when they stay within their water budgets.

Table 98. Variable Rate Costs and Components as Allocated to each Tier Tier Water
Use Supply Unit $ per hcf Base Unit $ per hcf Peaking Unit $ per hcf Conservation Unit $ per hcf
Revenue
Offset
Unit $
per hcf
Tier 1 1,425,082 $298,767 $0.21 $1,451,678 $1.02 $1,526,134 $1.07 $0 $0.00 -$31,016 -$0.02 Tier 2 168,830 $35,395 $0.21 $171,980 $1.02 $208,065 $1.23 $7,241 $0.04 $0 $0.00 Variable Rate Components
Table 99 shows the calculation used to determine the variable rates for each tier. Supply costs are added to peaking, conservation, and base costs to calculate the variable rates. Rates are then reduced by revenue offsets, which were set aside in the cost of service analysis.

Table 99. Variable Rate Calculation
Tier Supply
Cost
Base
Cost
Peaking
Cost
Conservation
Cost
Revenue
Offset
Variable
Rate
Tier 1 $0.21 + $1.02 + $1.07 + $0.00 - $0.02 = $2.28
Tier 2 $0.21 + $1.02 + $1.23 + $0.04 - $0.00 = $2.50
In future years, the rates will be escalated by the revenue adjustments and the five-year rate schedule is shown in Table 100. Each adjustment will occur in January, midway through the fiscal year.

Table 100. Proposed 5-Year Variable Rate Schedule
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Proposed Adjustment 4.0% 4.0% 4.0% 4.0% 4.0%
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Tier 1 $2.37 $2.46 $2.56 $2.66 $2.77
Tier 2 $2.60 $2.71 $2.82 $2.93 $3.05

4.4 Bill Impact Analysis
This analysis compares customers’ bills under current and proposed rates. Figure 16 shows the dollar change in the bill based on 1 1/2” meter customer’s, use at selected usage points. The City’s average 1

83 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study 1/2” reclaimed water customer uses water at 134 hcf monthly. Additionally, the 75th percentile of use for a 1 1/2” reclaimed water customer is under 311 hcf per billing period.

Figure 16. Reclaimed Water Customer Impact by Usage for 1 1/2” Meter $368.60
$1,006.88
$418.51
$879.37
$0.00
$200.00
$400.00
$600.00
$800.00
$1,000.00
$1,200.00
134 hcf (average) 311 hcf (75 percentile)
Current Proposed

84 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

SEWER UTILITY

5.1 Financial Plan
RDN built a 10-year financial model for the City of Corona’s sewer system to meet the system’s longterm financial goals. The detailed rate analysis was performed for the first five years.

Revenues
RDN conducted a revenue analysis using the current sewer rates. The City currently collects fixed revenues from all customers. Fixed revenue forecasts are based on the customer growth assumptions described in the Methodology Section. Table 101 shows the projected number of accounts connections for FY 2024 to FY 2029.

Table 101. Sewer Customer Growth, FY 2024 to FY 2029
Account Type FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Inside Standard Sewer 49,327 49,574 49,822 50,071 50,321 50,573 Inside Commercial
Commercial - 5/8" 142 143 144 145 146 147
Commercial - 3/4" 176 177 178 179 180 181
Commercial - 1" 566 569 572 575 578 581
Commercial - 1 1/2" 502 505 508 511 514 517
Commercial - 2" 536 539 542 545 548 551
Commercial - 3" 25 25 25 25 25 25
Commercial - 4" 10 10 10 10 10 10
Commercial - 6" 4 4 4 4 4 4
Commercial - 8" - - - - - -
Special
Special - Less than or equal to 1" 50 50 50 50 50 50
Special - Larger than 1" 94 94 94 94 94 94
Motels and Hotels
Motels and Hotels Accounts 24 24 24 24 24 24
Motels and Hotels Units 3,137 3,153 3,169 3,185 3,201 3,217 Laundries
Laundries Accounts 6 6 6 6 6 6
Laundries Machines 200 200 200 200 200 200
The revenue analysis also includes other operating and non-operating revenues such as interest income and miscellaneous revenue. These revenues are used to offset the revenue requirements that need to be recovered from customers’ rates. This projection was created under the status quo rates and does not include proposed revenue adjustments. Table 102 shows the projected non-operating revenue for the sewer utility by source for FY 2024 to FY 2029.

85 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 102. Annual Non-Operating Revenue by Source, FY 2024 to FY 2029 Non-Operating Revenue FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Interest On Investments $1,166,511 $1,189,841 $1,213,638 $1,237,911 $1,262,669 $1,287,922 Miscellaneous Income/Refunds $600 $600 $600 $600 $600 $600 Premium On Sale Of Bond $18,931 $0 $0 $0 $0 $0
Total $1,186,042 $1,190,441 $1,214,238 $1,238,511 $1,263,269 $1,288,522 The system’s total revenue for the study period is estimated to be approximately $33.9 to $34.6 million annually under the current rates. Table 103 shows the projected sewer system revenues by category for the study period (FY 2024 – FY 2029) without any revenue adjustments, projections are based on customer growth projections as well as other operating and non-operating revenue estimates provided by City staff.

Table 103. Sewer System Revenue Forecast, FY 2024 to FY 2029 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Revenue from Rates
Fixed Revenue $32,452,221 $32,128,836 $32,288,329 $32,448,370 $32,608,958 $32,770,641 Rate Revenue Total $32,452,221 $32,128,836 $32,288,329 $32,448,370 $32,608,958 $32,770,641 Other Operating Revenues $618,967 $618,967 $584,967 $584,967 $584,967 $584,967 Non-operating Revenues $1,186,042 $1,190,441 $1,214,238 $1,238,511 $1,263,269 $1,288,522 Total $34,257,230 $33,938,244 $34,087,534 $34,271,848 $34,457,194 $34,644,130 Operating and Maintenance (O&M) Expense
The itemized O&M expenses were carefully reviewed by the City and forecast for the study period using escalation factors discussed in the Key Assumptions section. Table 104 shows the City’s projected O&M expenses for the sewer utility during the study period. O&M Expenses are expected to increase by 4.2 percent on average annually.

Table 104. Sewer System O&M Expense Forecast, FY 2024 to FY 2029 Expense Category FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Development Service/Permitting $35,444 $53,220 $56,789 $60,619 $62,936 $65,343 Capital Improvements $597,236 $798,593 $852,026 $909,356 $944,026 $980,027 General Service $5,692,899 $5,929,156 $6,160,495 $6,366,556 $6,554,248 $6,747,574 Regulatory Compliance $808,229 $843,104 $877,735 $908,828 $935,766 $963,519 Operations $16,067,055 $16,829,491 $17,593,998 $18,346,035 $19,031,348 $19,743,627 Infrastructure Maintenance $2,383,377 $2,511,936 $2,634,913 $2,755,289 $2,846,751 $2,940,259 Facilities Maintenance $3,379,884 $3,612,641 $3,800,446 $3,989,108 $4,147,828 $4,291,950 Utility Billing & Customer Care $1,248,003 $1,320,448 $1,388,314 $1,455,660 $1,504,152 $1,554,297 Conservation $13,364 $13,829 $14,309 $14,703 $15,107 $15,522 City Clerk $3,572 $3,852 $4,154 $4,480 $4,659 $4,844
Total Operating $30,229,063 $31,916,269 $33,383,179 $34,810,635 $36,046,819 $37,306,961

86 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Other Obligations
Other obligations included in the financial plan are capital improvement projects funded by PAYGO (Pay As You Go), debt service obligations, and reserve contributions made from rates.

Capital Improvement Projects
The City plans to spend an average of $14.8 million a year on sewer rate funded capital expenditures during the rate setting period. An additional $1.2 million on average per year in sewer capital expenditures will be funded by capacity fees. During the 5-year rate setting period, City staff indicated the City is in the process of conducting a capacity fee study, so capacity fee funded CIP is not included in the rate analysis.

Table 105 shows the capital expenditure by expenditure type. The City plans to use customer rates to accomplish the proposed capital plan, where capacity fees and grants are not available. Figure 17 graphically shows the rate study capital plan by funding source, only PAYGO funded expenditure will impact customer rates.

Table 105. Rate Study Sewer CIP Expenses by Expense Type, FY 2024 to FY 2029 CIP Funding Source FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Rate Funded $12,000,000 $13,131,336 $14,262,672 $15,394,008 $16,525,344 $17,430,600 Capacity Fee $6,901,564 $454,499 $0 $0 $0 $0
Grant Funded $479,170 $0 $0 $0 $0 $0
Total CIP $19,380,734 $13,585,835 $14,262,672 $15,394,008 $16,525,344 $17,430,600 Figure 17. Rate Study Sewer CIP Expenses by Funding Source, FY 2024 to FY 2029 $0
$5
$10
$15
$20
$25
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Millions
Rate Funded Capacity Fee (Developer) Grant Funded

87 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Debt Service and Coverage Ratios
The City’s debt service schedule totals between $3.4 million and $3.7 million a year during the study period. Current debt obligations include rate funded debt as well. Table 106 shows the annual debt service payments which are allocated to the sewer fund.

Table 106. Sewer Fund Debt Service Payments, FY 2024 to FY 202927 Description FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Principal $1,513,603 $1,588,628 $1,666,810 $1,737,657 $1,812,172 $1,832,372 Interest $2,164,636 $2,046,504 $1,927,563 $1,808,747 $1,691,479 $1,574,072 Total Debt Service $3,678,240 $3,635,132 $3,594,374 $3,546,404 $3,503,650 $3,406,444 Table 107 shows the DSCR under the current finances detailed in the previous tables. Capital leases were removed from the DSCR calculation because they do not include a coverage requirement. To derive the DSCR, net revenue is divided by the total rate repaying debt service in each year.

Table 107. Sewer Debt Service Coverage Ratio Calculation, FY 2024 to FY 2029 Description FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Total Revenue $34,257,230 $33,938,244 $34,087,534 $34,271,848 $34,457,194 $34,644,130 Total Operating Expense $30,229,063 $31,916,269 $33,383,179 $34,810,635 $36,046,819 $37,306,961 Net Revenue $4,028,167 $2,021,975 $704,355 ($538,787) ($1,589,625) ($2,662,831) Total Non- Lease Debt Service $2,129,455 $2,170,537 $2,209,758 $2,237,769 $2,267,197 $2,238,564 Debt Service Coverage Ratio 1.89 0.93 0.32 -0.24 -0.70 -1.19 DSCR Requirement 1.25 1.25 1.25 1.25 1.25 1.25
Under the current rates, the City will be in technical default beginning in FY 2025 as net revenues are not 125 percent greater than debt service payments. Figure 18 graphically shows the projected debt service coverage ratios based on the current financial plan.
27 City staff provided details of all current and planned debt service obligations

88 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 18. Debt Service Coverage Ratio Under Current Rates, FY 2024 to FY 2029 Reserves
The City must maintain an appropriate reserve balance to ensure the day-to-day operation will continue during emergencies and guarantee the future stability of the system. The City’s financial goal is to build an appropriate level of cash reserves for each reserve fund included in the financial plan of this Study.

Reserve target for the sewer utility is described below:
• Operating Reserve: three months of operating expenses plus annual depreciation The reserve target at the end of the study period reaches $14.5 million. Table 108 shows the City’s reserve targets for FY 2024 through FY 2029 based on the current reserve policy. Figure 19 displays the resulting cash balances versus the reserve target under the current rates. Reserve targets based on reserve policy shown in Table 20 and operating, capital, and debt service totals shown in Tables 103, 104, and 105, respectively.

Table 108. Sewer Reserve Target, FY 2024 to FY 2029
Reserve Fund FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Operating Reserve $12,770,787 $13,192,588 $13,559,316 $13,916,180 $14,225,226 $14,540,261 Page 400 of 633 89 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 19. Sewer Cash Balances and Reserve Target With Current Rates, FY 2024 to FY 2029

90 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Financial Plan
Based on the projected total revenue and necessary costs to be recovered during the study period, RDN built a financial plan that will generate sufficient revenues for the day-to-day operation and annual PAYGO and make appropriate contributions to reserves. The City currently has a projected ending cash balance of $31.4 million in FY 2024. Table 109 shows the status quo sewer pro forma with no revenue adjustments and the resulting ending balances based on the revenues and expenses outlined in this section.

Table 109. Status Quo Financial Pro Forma for City of Corona Sewer System, FY 2024 to FY 2029 Rate Increase 0.0% 0.0% 0.0% 0.0% 0.0% 0.0%
Rate Month Implemented
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Cash Position Opening Balance $ 43,004,670 $ 31,354,597 $ 16,610,104 $ (542,586) $ (20,021,785) $ (41,640,404) Revenues
Sewer Rate Revenue $ 32,452,221 $ 32,128,836 $ 32,288,329 $ 32,448,370 $ 32,608,958 $ 32,770,641 Adjusted Sewer Rate Revenue $ - $ - $ - $ - $ - $ -
Other Operating Revenue $ 618,967 $ 618,967 $ 584,967 $ 584,967 $ 584,967 $ 584,967 Non-Operating Revenue $ 1,186,042 $ 1,190,441 $ 1,214,238 $ 1,238,511 $ 1,263,269 $ 1,288,522 Total Revenues $ 34,257,230 $ 33,938,244 $ 34,087,534 $ 34,271,848 $ 34,457,194 $ 34,644,130 Operating Expenses $ 30,229,063 $ 31,916,269 $ 33,383,179 $ 34,810,635 $ 36,046,819 $ 37,306,961 Net Operating Revenue $ 4,028,167 $ 2,021,975 $ 704,355 $ (538,787) $ (1,589,625) $ (2,662,831) Current Debt Service $ 3,678,240 $ 3,635,132 $ 3,594,374 $ 3,546,404 $ 3,503,650 $ 3,406,444 Proposed Debt Service $ - $ - $ - $ - $ - $ -
Total Operating and Debt Service $ 33,907,303 $ 35,551,401 $ 36,977,553 $ 38,357,039 $ 39,550,470 $ 40,713,405 Net Revenues Before CIP $ 349,927 $ (1,613,157) $ (2,890,018) $ (4,085,191) $ (5,093,276) $ (6,069,275) Capital Expenditure $ 19,380,734 $ 13,585,835 $ 14,262,672 $ 15,394,008 $ 16,525,344 $ 17,430,600 Debt $ - $ - $ - $ - $ - $ -
Debt New $ - $ - $ - $ - $ - $ -
Capacity Fee $ 6,901,564 $ 454,499 $ - $ - $ - $ -
Grants $ 479,170 $ - $ - $ - $ - $ -
Cash $ 12,000,000 $ 13,131,336 $ 14,262,672 $ 15,394,008 $ 16,525,344 $ 17,430,600 Net Income $ (11,650,073) $ (14,744,493) $ (17,152,690) $ (19,479,199) $ (21,618,620) $ (23,499,875) Ending Balance $ 31,354,597 $ 16,610,104 $ (542,586) $ (20,021,785) $ (41,640,404) $ (65,140,280)

91 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 110 shows the proposed sewer pro forma for the study period with the recommended revenue adjustments per year. The proposed financial plan also includes a $45 million debt issuance in FY 2026 which will allow the City to accomplish their long-term capital plan. This debt issuance has additional debt service payments and coverage requirements, which were included in the revenue adjustments. All revenue adjustments will occur in January of the Fiscal Year.

Table 110. Proposed Financial Pro Forma for City of Corona Sewer System, FY 2024 to FY 2029 Rate Increase 10.0% 10.0% 10.0% 10.0% 10.0%
Rate Month Implemented 1-Jan 1-Jan 1-Jan 1-Jan 1-Jan
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Cash Position Opening Balance $ 43,004,670 $ 31,354,597 $ 18,216,546 $ 51,068,547 $ 37,439,318 $ 25,857,075 Revenues
Sewer Rate Revenue $ 32,452,221 $ 32,128,836 $ 32,288,329 $ 32,448,370 $ 32,608,958 $ 32,770,641 Adjusted Sewer Rate Revenue $ - $ 1,606,442 $ 5,004,691 $ 8,777,284 $ 12,963,691 $ 17,607,829 Other Operating Revenue $ 618,967 $ 618,967 $ 584,967 $ 584,967 $ 584,967 $ 584,967 Non-Operating Revenue $ 1,186,042 $ 1,190,441 $ 1,214,238 $ 1,238,511 $ 1,263,269 $ 1,288,522 Total Revenues $ 34,257,230 $ 35,544,686 $ 39,092,226 $ 43,049,132 $ 47,420,885 $ 52,251,959 Operating Expenses $ 30,229,063 $ 31,916,269 $ 33,383,179 $ 34,810,635 $ 36,046,819 $ 37,306,961 Net Operating Revenue $ 4,028,167 $ 3,628,417 $ 5,709,047 $ 8,238,498 $ 11,374,066 $ 14,944,998 Current Debt Service $ 3,678,240 $ 3,635,132 $ 3,594,374 $ 3,546,404 $ 3,503,650 $ 3,406,444 Proposed Debt Service $ - $ - $ - $ 2,927,315 $ 2,927,315 $ 2,927,315 Total Operating and Debt Service $ 33,907,303 $ 35,551,401 $ 36,977,553 $ 41,284,354 $ 42,477,784 $ 43,640,720 Net Revenues Before CIP $ 349,927 $ (6,715) $ 2,114,673 $ 1,764,779 $ 4,943,101 $ 8,611,239 Capital Expenditure $ 19,380,734 $ 13,585,835 $ 14,262,672 $ 15,394,008 $ 16,525,344 $ 17,430,600 Debt Proceeds Proposed $ - $ - $ - $ - $ - $ -
Debt Proceeds New $ - $ - $ 45,000,000 $ - $ - $ -
Capacity Fee $ 6,901,564 $ 454,499 $ - $ - $ - $ -
Grants $ 479,170 $ - $ - $ - $ - $ -
Cash $ 12,000,000 $ 13,131,336 $ (30,737,328) $ 15,394,008 $ 16,525,344 $ 17,430,600 Net Income $ (11,650,073) $ (13,138,051) $ 32,852,001 $ (13,629,229) $ (11,582,243) $ (8,819,361) Ending Balance $ 31,354,597 $ 18,216,546 $ 51,068,547 $ 37,439,318 $ 25,857,075 $ 17,037,714

92 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Revenue Requirements
Table 111 displays the sewer utility’s revenue requirements FY 2024. The total expense for each year is offset by other operating revenues and non-operating revenues to compute a pure portion of revenue requirements that need to be recovered from customers’ rates. RDN proposes annual revenue adjustments of 10.0 percent FY 2025 through FY 2029 to reach the financial goals set by the City.

Table 111. Revenue Requirements for City of Corona Sewer Utility, FY 2024 Revenue Requirements FY 2024
Operating Expenses $30,229,063
Debt Service $3,678,240
Capital Expenditures (PAYGO) $12,000,000
Total Expenses $45,907,303
Other Operating Revenue ($618,967)
Non-Operating Revenue ($1,186,042)
Net Balance From Operations ($11,650,073)
Rate Revenue Requirement $32,452,221

93 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

5.2 Cost of Service Analysis
In the same way as the sewer system’s Cost of Service analysis was performed, a sewer system’s COS analysis also utilizes a three‐step approach to allocate costs proportionally among different customer classes. These steps include 1) functionalization of costs, 2) cost classification, and 3) cost allocation to customers. Provided below is a detailed discussion of the sewer COS analysis conducted for the City, and the specific steps taken for the analysis.

Figure 20. A Typical Flow for Cost of Service Analysis Process Functionalization of Costs
To allocate the cost of service among the different customer classes, costs first must be allocated to the appropriate sewer parameters. The following sections describe the allocation of the operating and capital costs of service to the appropriate parameters of the sewer system.

The total cost of sewer service is analyzed by system function in order to equitably distribute costs of service to the various classes of customers. For this analysis, sewer utility costs of service are developed consistent with the guidelines for allocating costs detailed in the Water Environment Federation (WEF) Manual of Practice No. 27, Financing and Charges for Sewer Systems.

A cost of service analysis distributes the revenue requirements (costs) to each customer class. After determining the revenue requirements, the next step is to functionalize the O&M costs based on the City’s O&M classification:
• Sewer Collection – Costs incurred in the collection of sewer • Pumping – Costs incurred in the pumping of sewer
• Treatment and Disposal – Costs incurred in the treatment and disposal of sewer Functionalization
The revenue requirement is
assigned to Cost Components
Allocation to Cost Causative
Components
The functional categories are
allocated to fixed costs and
variable costs.

Reallocation to Customers via
Rates
Each cost component is tied to
fixed and volumetric rate
components.

94 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study • Customer Accounts – costs associated with customer service and billing related tasks • Administrative and General – costs associated with administrative and general functions • Sewer Facilities – costs associated with sewer facilities The functionalization of costs allows us to better allocate the functionalized costs to the cost causation components. The cost causation components used in this study include:
• Service-Related Costs - are those costs that do not change with respect to the amount of sewer flow generated (in hcf) or the strength of the sewer (the amount of organic compounds or suspended solids in sewer). An example of fixed costs would be administrative costs. • Flow-Related costs - are those costs that are dependent upon the amount of sewer flow and strength. An example of variable costs would be chemical costs associated with treating sewer.

Once this process was complete, and the customer classes were identified, the unit cost of these classified costs were calculated and further allocated to different customer classes using the unit of services specific to the class. Table 112 through Table 117 show the steps taken to functionalize and allocate the City’s costs to each customer class.

Table 112. Percent of O&M Functional Categories Allocated28 Category Allocation Percent
Total O&M $30,229,063 100.0%
Sewer Collection $1,395,446 4.6%
Treatment and Disposal $11,435,865 37.8%
Customer Accounts $580,904 1.9%
Sewer Facilities $2,260,362 7.5%
Admin and General $14,556,486 48.2%
O&M Expense
Table 113. Percent of O&M Functional Categories Allocated to Cost Components Category Flow Service
Sewer Collection 100.0% 0.0%
Treatment and Disposal 100.0% 0.0%
Customer Accounts 0.0% 100.0%
Sewer Facilities 100.0% 0.0%
Admin and General 97.7% 2.3%
O&M Expense
28 City staff provided individual cost allocations for each budget item and system asset based on the standard categories shown

95 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 114. Total of Operating Functional Categories Allocated to Cost Components Category Flow Service
Sewer Collection $1,395,446 $0
Treatment and Disposal $11,435,865 $0
Customer Accounts $0 $580,904
Sewer Facilities $2,260,362 $0
Admin and General $14,221,687 $334,799
O&M Expense
Table 115. Percent of Asset Value Functional Categories Allocated Category Allocation Percent
Total Assets $256,037,114 100.0%
Sewer Collection $144,811,172 56.6%
Pumping $16,973,333 6.6%
Treatment and Disposal $71,402,256 27.9%
Customer Accounts $3,059,031 1.2%
Admin and General $19,791,323 7.7%
Asset Values
Table 116. Percent of Non-operating Functional Categories Allocated to Cost Components Category Flow Service
Sewer Collection 100.0% 0.0%
Treatment and Disposal 100.0% 0.0%
Customer Accounts 0.0% 100.0%
Pumping 100.0% 0.0%
Admin and General 98.7% 1.2%
Non-Operating Expense
Table 117. Total of Non-operating Functional Categories Allocated to Cost Components Category Flow Service
Sewer Collection $8,867,403 $0
Pumping $1,039,349 $0
Treatment and Disposal $4,372,263 $0
Customer Accounts $0 $187,317
Admin and General $1,196,214 $15,692
Non-Operating Expense
Table 118 displays the functionalized O&M costs and non-operating costs allocated to cost causative components for the sewer system. The non-operating expenses for the test year are made up of planned PAYGO capital expenditures and debt service payments. Those costs are distributed to the cost components based on the final percentages shown in Table 116, above. Operating allocations are based

96 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study on the actual projected test year expense and the total for each cost component reflect the percentages in Table 113.

Table 118. Revenue Requirement Cost Allocation by Cost Component Cost Allocation Summary Total Flow Service
O&M Revenue Requirements $30,229,063 $29,313,360 $915,703 Non-Operating Revenue Requirements $15,678,240 $15,475,230 $203,010 $45,907,303 $44,788,590 $1,118,713

97.6% 2.4%
Other Operating Revenue ($618,967) ($603,883) ($15,084) Non-Operating Revenue ($1,186,042) ($1,157,139) ($28,903) Net Balance From Operations ($11,650,073) ($11,366,172) ($283,900) Rate Revenue Requirement $32,452,221 $31,661,394 $790,827 Allocation to Units
In developing equitable rate structures, revenue requirements are allocated to customers commensurate with customer demand and services rendered. First, an overall number of units was determined for each cost component (Table 121). RDN completed a sewer mass balance and water consumption analysis.

The results of this analysis determined that the current flow caps for residential customers reflect an appropriate estimate of total sewer generated by those classes. Additionally, the sum of billed sewer flow reflects the total sewer flows reported by City staff. Table 119 shows the total sewer flow to the treatment plant in million gallons (MG) for fiscal year 2023 as well as water use and sewer flow for each customer class.

Table 119. Total Plant Sewer Flows29
Customer Class Water Use (hcf) gallons per day (million) Annual Flow (hcf) Inside Commercial 5/8 & City Park Rest 24,027 0.05 24,027 Inside Commercial 3/4" 27,148 0.06 27,148
Inside Commercial 1" 164,908 0.34 164,908
Inside Commercial 1 1/2" 286,688 0.59 286,688
Inside Commercial 2" 633,053 1.30 633,053
Inside Commercial 3" 44,858 0.09 44,858
Inside Commercial 4" 100,905 0.21 100,905
Inside Commercial 6" 31,595 0.06 31,595
Special - Less than or equal to 1" Meter 25,791 0.05 25,791 Special - Larger than 1" Meter 112,140 0.23 112,140
Motels & Hotels 91,032 0.19 91,032
Laundries 24,171 0.05 24,171
Total Non-Residential 1,566,316 3.21 1,566,316
Inside Standard Sewer 9.76 4,764,627
Total 12.97 6,330,943
29 Total flow rates to treatment plant provided by City Staff

97 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study The ultimate goal of a cost of service analysis is to proportionately distribute the revenue requirements to each user class. First, a cost allocation basis must be determined. To do so, billed sewer generation for each user class is estimated based on the projected billed water use for FY 2024. Residential customer’s indoor water use is shown in Table 120 under the current water budget methodology and the proposed water budgets (47 gpcd). The indoor water use under the current rates is within 3.3 percent of the estimates derived from the mass balance. In future rate studies, additional analysis should be conducted to review the impacts of water budget changes.

Table 120. Residential Indoor Water Use Under Current Water Rates and Proposed Water Rates Indoor Water
Use (Current)
Indoor Water Use
(Proposed)
Residential - Single Indoor 3,678,423 3,113,196
Residential - Multi-Family Indoor 933,992 836,054
Total 4,612,415 3,949,250
Results of Mass Balance 4,764,627
Table 121 shows the total water use allocated to each customer class which is used as the unit to divide the total costs allocated to sewer flow.

Table 121. Cost of Service Units of Service
Customer Class Customers Flow
Inside Standard Sewer 49,574 4,764,627
Inside Commercial 5/8" 142 24,027
Inside Commercial 3/4" 176 27,148
Inside Commercial 1" 566 164,908
Inside Commercial 1 1/2" 502 286,688
Inside Commercial 2" 536 633,053
Inside Commercial 3" 25 44,858
Inside Commercial 4" 10 100,905
Inside Commercial 6" 4 31,595
Special - Less than or equal to 1" Meter 50 25,791
Special - Larger than 1" Meter 94 112,140
Motels & Hotels 24 91,032
Laundries 6 24,171
Total 51,709 6,330,943
Costs allocated to each cost component were divided by the number of units to determine a unit cost (Table 122). Table 123 shows the projected average indoor use for indoor standard sewer customers based on the mass balance analysis (historical use data) which will be used to determine fixed and variable rates for all customers.

98 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 122. Cost of Service Unit Cost
Flow Service
Cost of Service $31,661,394 $790,827
Unit of Service 6,330,943 51,709
Cost per Unit $5.00 $15.29
Table 123. Average Residential Indoor Water Use
Customer Class Flow Customers Average Monthly
Flow
Inside Standard Sewer 4,764,627 49,574 8.0

99 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

5.3 Rate Design
The City’s sewer rates are currently comprised of a monthly service charge. The proposed rates will include a fixed charge which is applied to each customer’s bill. Table 124 shows the calculation used to determine sewer rates for each customer class. Inside standard sewer customers will only pay the fixed charge as the proposed rates include the average use of that customer billed monthly. For customers who are not currently identified as inside standard sewer, water use above 8 hcf a month will be billed at the unit rate per hcf. Since the fixed portion of rates includes the average indoor use, all additional use represents the additional impact a customer has on the sewer system above an inside standard sewer customer’s impact. The proposed rates increase equity across customer classes as well as within customer classes because customers will only pay a bill based on their actual impact on the system.

Table 124. Sewer Rate Calculation
Proposed Sewer Rates Service
Component
Flow
Component COS Rate
Fixed Charge (All Customers) $15.29 / 12 + $5.00 x 8.01 $41.33 Variable Charge (Non-Residential per hcf) $5.00 x 1 $5.00 Sewer Rates
In future years, the rates will be escalated by the revenue adjustments and the five-year rate schedule shown in Table 125. Each adjustment will occur in January, midway through the fiscal year. As part of the proposed rate changes, the City must implement a variance program for commercial customers whose water use and sewer flow may not be directly comparable. For example, a customer who cycles water within a closed system and does not flush that water down the sewer should not pay for that as sewer flow. The City should review the variances on a case-by-case basis, and should review variances if a business changes.

Table 125. Proposed Variable Sewer Rates FY 2025 to FY 2029 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Proposed Adjustment 10.0% 10.0% 10.0% 10.0% 10.0%
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Fixed Charge (All Customers) $45.46 $50.01 $55.01 $60.51 $66.56 Variable Charge (Non-Residential per hcf) $5.50 $6.05 $6.66 $7.32 $8.05

100 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

CONCLUSION

6.1 Summary of Recommendations and Financial Results
Recommendations:

Water
• Adjusting rates annually by the recommended revenue adjustments of 9.0 percent per year • Increasing the fixed proportion of rate collection
• Reducing the indoor allocation for residential customers from 55 gallons per capita per day (gpcd) to 47 gpcd
• Reducing the number of tiers for all customers by one Reclaimed Water
• Adjusting rates annually by the recommended revenue adjustments of 4.0 percent per year • Reducing the number of tiers for all customers from four to two Sewer
• Adjusting rates annually by the recommended revenue adjustments of 10.0 percent per year • Changing the rate structure to bill the same fixed charge for all customers • Introducing a variable charge for non-residential units for all water use over 8 hundred cubic feet (hcf) in a billing period
• Implementing a variance program for customers whose water use does not equal their sewer flow

101 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study The following figures summarize the recommendations of this report:

Figure 21 shows the status quo water financial plan used for this study.

Figure 21. Rate Study Water Status Quo Financial Plan

102 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 22 shows the City’s water utility ending cash balances with no adjustments to the revenue requirements.

Figure 22. Ending Water Cash Balances with No Revenue Adjustment

103 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 23 shows the recommended annual water revenue adjustments for each year of the rate setting period.

Figure 23. Recommended Water Revenue Adjustment

104 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 24 shows the proposed financial plan with revenue adjustments used for this study.

Figure 24. Recommended Rate Study Adjusted Water Financial Plan Note: Proposed financial plan includes $50 million debt issuance in FY 2025-26 which funds previously cash funded capital projects

105 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 126 and Table 127 show the proposed fixed rates and variable rates based on the proposed revenue adjustments and cost of service analysis for each year of the rate setting period, respectively.

Table 126. Proposed Potable Fixed Rates for FY 2025 to FY 2029 Customer Class FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Domestic
5/8" $32.79 $35.75 $38.96 $42.47 $46.29
3/4" $42.94 $46.80 $51.02 $55.61 $60.61
1" $63.23 $68.92 $75.12 $81.88 $89.25
1 1/2" $113.94 $124.20 $135.38 $147.56 $160.84
2" $174.81 $190.54 $207.69 $226.38 $246.75
3" $367.54 $400.62 $436.67 $475.97 $518.81
4" $651.56 $710.20 $774.12 $843.79 $919.74
6" $1,635.51 $1,782.70 $1,943.15 $2,118.03 $2,308.65
8" $2,852.76 $3,109.51 $3,389.36 $3,694.40 $4,026.90
10" $4,272.88 $4,657.44 $5,076.61 $5,533.51 $6,031.52
Fire Protection
5/8" $12.64 $13.78 $15.02 $16.37 $17.84
3/4" $12.64 $13.78 $15.02 $16.37 $17.84
1" $12.64 $13.78 $15.02 $16.37 $17.84
1 1/2" $13.33 $14.53 $15.84 $17.27 $18.82
2" $14.91 $16.25 $17.71 $19.31 $21.05
3" $17.63 $19.21 $20.94 $22.83 $24.88
4" $27.38 $29.84 $32.53 $35.46 $38.65
6" $44.20 $48.18 $52.51 $57.24 $62.39
8" $69.50 $75.76 $82.57 $90.01 $98.11
10" $104.57 $113.98 $124.24 $135.42 $147.61
Fixed Charges
Table 127. Proposed Potable Variable Rates for FY 2025 to FY 2029 Tier FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Residential
Tier 1 $1.96 $2.13 $2.32 $2.53 $2.76
Tier 2 $3.31 $3.60 $3.93 $4.28 $4.67
Tier 3 $4.38 $4.77 $5.20 $5.67 $6.18
Tier 4 $5.22 $5.69 $6.20 $6.76 $7.36
Non-Residential
Tier 1 $3.31 $3.60 $3.93 $4.28 $4.67
Tier 2 $4.38 $4.77 $5.20 $5.67 $6.18
Tier 3 $5.22 $5.69 $6.20 $6.76 $7.36
Variable Charges

106 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 25 shows the City’s ending cash balances after revenue and rate adjustments are made.

Figure 25. Recommended Ending Water Cash Balances with Revenue Adjustment Note: Proposed financial plan includes $50 million debt issuance in FY 2026 which shows as available cash in the cash balance calculation

107 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 26 shows the status quo reclaimed water financial plan used for this study.

Figure 26. Rate Study Reclaimed Water Status Quo Financial Plan

108 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 27 shows the City’s reclaimed water utility ending cash balances with no adjustments to the revenue requirements.

Figure 27 Ending Reclaimed Water Cash Balances with No Revenue Adjustment Figure 28 shows the recommended annual reclaimed water revenue adjustments for each year of the rate setting period.

109 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 28. Recommended Reclaimed Water Revenue Adjustment Figure 29 shows the proposed financial plan with revenue adjustments used for this study.

110 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 29. Recommended Rate Study Adjusted Reclaimed Water Financial Plan Note: Proposed financial plan includes an $8 million interfund loan in FY 2025 and a $6 million interfund loan in FY 2026 which funds previously cash funded capital projects
Table 128 and Table 129 show the proposed fixed rates and variable rates based on the proposed revenue adjustments and cost of service analysis for each year of the rate setting period, respectively.

Table 128. Proposed Reclaimed Water Fixed Rates for FY 2025 to FY 2029 Customer Class FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Reclaimed Water
5/8" $26.64 $27.70 $28.81 $29.96 $31.16
3/4" $35.95 $37.38 $38.88 $40.43 $42.05
1" $54.57 $56.75 $59.02 $61.38 $63.84
1 1/2" $101.12 $105.16 $109.37 $113.75 $118.30
2" $156.98 $163.26 $169.79 $176.58 $183.65
3" $333.88 $347.24 $361.13 $375.57 $390.60
4" $594.58 $618.36 $643.10 $668.82 $695.57
6" $1,497.70 $1,557.61 $1,619.91 $1,684.71 $1,752.10
8" $2,614.96 $2,719.56 $2,828.34 $2,941.48 $3,059.14
10" $3,918.44 $4,075.17 $4,238.18 $4,407.71 $4,584.02
Fixed Charges

111 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Table 129. Proposed Reclaimed Water Variable Rates for FY 2025 to FY 2029 Tier FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Reclaimed Water
Tier 1 $2.37 $2.46 $2.56 $2.66 $2.77
Tier 2 $2.60 $2.71 $2.82 $2.93 $3.05
Variable Charges
Figure 30 shows the City’s ending cash balances after revenue and rate adjustments are made.

Figure 30. Recommended Ending Reclaimed Water Cash Balances with Revenue Adjustment Note: Proposed financial plan includes an $8 million interfund loan in FY 2025 and a $6 million interfund loan in FY 2026 and which shows as available cash in the cash balance calculation

112 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 31 shows the status quo sewer financial plan used for this study.

Figure 31. Rate Study Sewer Status Quo Financial Plan

113 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 32 shows the City’s sewer utility ending cash balances with no adjustments to the revenue requirements.

Figure 32. Ending Sewer Cash Balances with No Revenue Adjustment Figure 33 shows the recommended annual sewer revenue adjustments for each year of the rate setting period.

114 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 33. Recommended Sewer Revenue Adjustment

115 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 34 Figure 34 shows the proposed financial plan with revenue adjustments used for this study.

Figure 34. Rate Study Adjusted Sewer Financial Plan
Note: Proposed financial plan includes $45 million debt issuance in FY 2026 which funds previously cash funded capital projects
Table 130 shows the resulting Sewer rates based on the proposed revenue adjustments and cost of service analysis for each year of the rate setting period, respectively.

Table 130. Proposed Sewer Rates Based on the Proposed Revenue Adjustment Base Charge FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
All Connections $45.46 $50.01 $55.01 $60.51 $66.56
Per hcf FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Non-Residential >8 hcf $5.50 $6.05 $6.66 $7.32 $8.05
Variable Charges
Fixed Charges

116 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 35 shows the City’s ending cash balances after revenue and rate adjustments are made.

Figure 35. Recommended Ending Sewer Cash Balances with Revenue Adjustment Note: Proposed financial plan includes $45 million debt issuance in FY 2026 which shows as available cash in the cash balance calculation

117 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

6.2 Rate Impacts and Comparison
Figure 36 through Figure 38 show combined test year rate impacts water and sewer utilities on different customer classes.

Figure 36. Single Family Residential Combined Impacts for Water and Sewer $95.57
$110.41
$132.57
$174.66
$102.10
$120.87
$147.32
$187.50
$0.00
$20.00
$40.00
$60.00
$80.00
$100.00
$120.00
$140.00
$160.00
$180.00
$200.00
7 hcf (25 percentile) 13 hcf (average) 21 hcf (75 percentile) 31 hcf (90 percentile) Current Proposed

118 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 37. Multi-Family Residential Combined Impacts for Water and Sewer (Four Units) $219.14 $228.79
$249.57
$304.97
$223.83 $233.61
$259.14
$325.71
$0.00
$50.00
$100.00
$150.00
$200.00
$250.00
$300.00
$350.00
7 hcf (25 percentile) 13 hcf (average) 21 hcf (75 percentile) 31 hcf (90 percentile) Current Proposed

119 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 38. Non-Residential (Commercial) Combined Impacts for Water and Sewer (2” Meter) $494.00
$596.49
$860.97
$317.18
$643.06
$1,302.92
$0.00
$200.00
$400.00
$600.00
$800.00
$1,000.00
$1,200.00
$1,400.00
16 hcf (25 percentile) 53 hcf (average) 125 hcf (75 percentile) Current Proposed
Figure 39 shows a comparison of the City’s current and proposed combined water and sewer rates for a single-family residential customer who uses 13 hcf per month. 13 hcf represents the average monthly water use for a single-family residential customer. Note that the City of Corona uses a water budget rate structure, so the standard residential customer assumes 4 persons per household with a 4,000 square foot lot, a ¾” meter, and an ET of 5.91.

120 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Figure 39. Neighboring Agencies Combined Bill Comparison $107.05 $110.41
$120.87
$142.22 $142.27 $142.79
$154.12
$0.00
$20.00
$40.00
$60.00
$80.00
$100.00
$120.00
$140.00
$160.00
$180.00
Jurupa CSD City of Corona
(current)
City of Corona
(proposed)
Elsinore Valley
MWD
City of Chino Hills City of Norco Western MWD
(Riverside
Division)

121 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

APPENDIX
This appendix includes the background data used in this report.

Fixed Revenue/Growth Projections - Water
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Residential Single Family - Potable $17,239,529 $17,325,073 $17,411,380 $17,498,349 $17,585,755 $17,673,600 $17,761,444 $17,849,725 $17,938,444 $18,027,163 5/8" 3,492 3,509 3,527 3,545 3,563 3,581 3,599 3,617 3,635 3,653 3/4" 27,767 27,906 28,046 28,186 28,327 28,469 28,611 28,754 28,898 29,042 1" 5,853 5,882 5,911 5,941 5,971 6,001 6,031 6,061 6,091 6,121 1 1/2" 36 36 36 36 36 36 36 36 36 36
2" 19 19 19 19 19 19 19 19 19 19
3"
4"
6"
8"
10"
Residential Multi-Family - Potable $2,355,653 $2,368,221 $2,381,227 $2,394,232 $2,407,237 $2,420,243 $2,433,248 $2,446,253 $2,459,259 $2,472,264 5/8" 1,908 1,918 1,928 1,938 1,948 1,958 1,968 1,978 1,988 1,998 3/4" 898 902 907 912 917 922 927 932 937 942
1" 404 406 408 410 412 414 416 418 420 422
1 1/2" 326 328 330 332 334 336 338 340 342 344
2" 321 323 325 327 329 331 333 335 337 339
3" 5 5 5 5 5 5 5 5 5 5
4" 4 4 4 4 4 4 4 4 4 4
6" 1 1 1 1 1 1 1 1 1 1
8"
10"
Commercial - Potable $1,805,111 $1,813,440 $1,821,770 $1,830,099 $1,838,429 $1,846,758 $1,855,088 $1,863,418 $1,871,747 $1,880,077 5/8" 130 131 132 133 134 135 136 137 138 139
3/4" 167 168 169 170 171 172 173 174 175 176
1" 374 376 378 380 382 384 386 388 390 392
1 1/2" 427 429 431 433 435 437 439 441 443 445
2" 427 429 431 433 435 437 439 441 443 445
3" 20 20 20 20 20 20 20 20 20 20
4" 4 4 4 4 4 4 4 4 4 4
6"
8"
10"
Governmental - Potable $268,505 $268,505 $268,505 $268,505 $268,505 $268,505 $268,505 $268,505 $268,505 $268,505 5/8" 14 14 14 14 14 14 14 14 14 14
3/4" 26 26 26 26 26 26 26 26 26 26
1" 16 16 16 16 16 16 16 16 16 16
1 1/2" 35 35 35 35 35 35 35 35 35 35
2" 50 50 50 50 50 50 50 50 50 50
3" 8 8 8 8 8 8 8 8 8 8
4" 5 5 5 5 5 5 5 5 5 5
6" 2 2 2 2 2 2 2 2 2 2
8"
10"
Industrial - Potable $759,153 $762,936 $766,719 $770,503 $774,286 $778,070 $781,853 $785,637 $789,420 $793,204 5/8" 9 9 9 9 9 9 9 9 9 9
3/4" 51 51 51 51 51 51 51 51 51 51
1" 253 254 255 256 257 258 259 260 261 262
1 1/2" 171 172 173 174 175 176 177 178 179 180
2" 159 160 161 162 163 164 165 166 167 168
3" 3 3 3 3 3 3 3 3 3 3
4" 1 1 1 1 1 1 1 1 1 1
6" 2 2 2 2 2 2 2 2 2 2
8"
10"

122 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Residential Single Family - Landscape $31,735 $31,735 $31,735 $31,735 $31,735 $31,735 $31,735 $31,735 $31,735 $31,735 5/8" 1 1 1 1 1 1 1 1 1 1
3/4" 4 4 4 4 4 4 4 4 4 4
1" 13 13 13 13 13 13 13 13 13 13
1 1/2" 11 11 11 11 11 11 11 11 11 11
2" 4 4 4 4 4 4 4 4 4 4
3"
4"
6"
8"
10"
Residential Multi-Family - Landscape $19,070 $19,166 $19,262 $19,358 $19,455 $19,552 $19,650 $19,748 $19,847 $19,946 5/8"
3/4"
1"
1 1/2"
2" 10 10 10 10 10 10 10 10 10 11
3"
4"
6"
8"
10"
Commercial - Landscape $727,766 $731,549 $735,333 $739,116 $742,899 $746,683 $750,466 $754,250 $758,033 $761,817 5/8" 5 5 5 5 5 5 5 5 5 5
3/4" 37 37 37 37 37 37 37 37 37 37
1" 148 149 150 151 152 153 154 155 156 157
1 1/2" 163 164 165 166 167 168 169 170 171 172
2" 211 212 213 214 215 216 217 218 219 220
3" 3 3 3 3 3 3 3 3 3 3
4"
6"
8"
10"
Governmental - Landscape $222,258 $222,258 $222,258 $222,258 $222,258 $222,258 $222,258 $222,258 $222,258 $222,258 5/8" 2 2 2 2 2 2 2 2 2 2
3/4" 40 40 40 40 40 40 40 40 40 40
1" 75 75 75 75 75 75 75 75 75 75
1 1/2" 95 95 95 95 95 95 95 95 95 95
2" 18 18 18 18 18 18 18 18 18 18
3" 1 1 1 1 1 1 1 1 1 1
4"
6"
8"
10"
Industrial - Landscape $34,760 $34,760 $34,760 $34,760 $34,760 $34,760 $34,760 $34,760 $34,760 $34,760 5/8"
3/4"
1" 5 5 5 5 5 5 5 5 5 5
1 1/2" 10 10 10 10 10 10 10 10 10 10
2" 8 8 8 8 8 8 8 8 8 8
3" 1 1 1 1 1 1 1 1 1 1
4"
6"
8"
10"
Commercial - Hydrant $252,200 $248,169 $248,169 $244,137 $240,106 $236,074 $236,074 $232,043 $228,012 $228,012 5/8"
3/4"
1"
1 1/2"
2" 1 1 1 1 1 1 1 1 1 1
3" 48 47 47 46 45 44 44 43 42 42
4" 1 1 1 1 1 1 1 1 1 1
6" 1 1 1 1 1 1 1 1 1 1
8" 1 1 1 1 1 1 1 1 1 1
10"

123 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Variable Revenue/Use Projections - Water
Governmental - Hydrant $8,063 $8,063 $8,063 $8,063 $8,063 $8,063 $8,063 $8,063 $8,063 $8,063 5/8"
3/4"
1"
1 1/2"
2"
3" 2 2 2 2 2 2 2 2 2 2
4"
6"
8"
10"
Fire Protection $728,537 $732,585 $736,632 $740,679 $744,727 $749,498 $754,268 $759,039 $763,810 $768,581 5/8" - - - - - - - - - -
3/4" - - - - - - - - - -
1" - - - - - - - - - -
1 1/2" 25 25 25 25 25 25 25 25 25 25
2" 25 25 25 25 25 25 25 25 25 25
2 1/2" 19 19 19 19 19 19 19 19 19 19
4" 147 148 149 150 151 152 153 154 155 156
6" 503 506 509 512 515 518 521 524 527 530
8" 493 495 497 499 501 504 507 510 513 516
10" 112 113 114 115 116 117 118 119 120 121
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Residential Single Family - Potable $20,752,517 $20,855,813 $20,960,226 $21,065,198 $21,170,728 $21,276,816 $21,382,904 $21,489,550 $21,596,755 $21,703,960 Width 1 3,666,924 3,685,176 3,703,626 3,722,174 3,740,821 3,759,566 3,778,312 3,797,156 3,816,099 3,835,042 Width 2 3,131,627 3,147,214 3,162,971 3,178,811 3,194,736 3,210,745 3,226,754 3,242,848 3,259,025 3,275,203 Width 3 547,130 549,854 552,606 555,374 558,156 560,953 563,750 566,562 569,388 572,215 Width 4 122,955 123,568 124,186 124,808 125,433 126,062 126,690 127,322 127,957 128,593 Width 5 64,836 65,159 65,485 65,813 66,142 66,474 66,805 67,139 67,474 67,808 Width 6
Residential Multi-Family - Potable $3,254,720 $3,271,553 $3,289,228 $3,306,903 $3,324,578 $3,342,253 $3,359,928 $3,377,603 $3,395,278 $3,412,953 Width 1 933,804 938,634 943,705 948,776 953,847 958,918 963,989 969,060 974,131 979,202 Width 2 83,132 83,562 84,013 84,465 84,916 85,367 85,819 86,270 86,722 87,173 Width 3 94,130 94,616 95,128 95,639 96,150 96,661 97,172 97,683 98,195 98,706 Width 4 30,679 30,838 31,005 31,171 31,338 31,504 31,671 31,838 32,004 32,171 Width 5 31,389 31,551 31,722 31,892 32,063 32,233 32,404 32,574 32,745 32,915 Width 6
Commercial - Potable $3,721,706 $3,740,927 $3,760,149 $3,779,370 $3,798,591 $3,817,812 $3,837,033 $3,856,255 $3,875,476 $3,894,697 Width 1 894,029 898,646 903,263 907,881 912,498 917,115 921,733 926,350 930,967 935,585 Width 2 100,596 101,115 101,635 102,155 102,674 103,194 103,713 104,233 104,752 105,272 Width 3 26,070 26,205 26,339 26,474 26,609 26,743 26,878 27,012 27,147 27,282 Width 4 33,570 33,744 33,917 34,091 34,264 34,437 34,611 34,784 34,958 35,131 Width 5
Width 6
Governmental - Potable $641,956 $641,956 $641,956 $641,956 $641,956 $641,956 $641,956 $641,956 $641,956 $641,956 Width 1 142,265 142,265 142,265 142,265 142,265 142,265 142,265 142,265 142,265 142,265 Width 2 18,797 18,797 18,797 18,797 18,797 18,797 18,797 18,797 18,797 18,797 Width 3 5,418 5,418 5,418 5,418 5,418 5,418 5,418 5,418 5,418 5,418 Width 4 7,025 7,025 7,025 7,025 7,025 7,025 7,025 7,025 7,025 7,025 Width 5
Width 6
Industrial - Potable $1,331,503 $1,337,658 $1,343,813 $1,349,967 $1,356,122 $1,362,277 $1,368,432 $1,374,587 $1,380,742 $1,386,897 Width 1 313,701 315,151 316,601 318,051 319,501 320,951 322,401 323,851 325,301 326,751 Width 2 31,938 32,085 32,233 32,381 32,528 32,676 32,824 32,971 33,119 33,267 Width 3 9,619 9,664 9,708 9,753 9,797 9,842 9,886 9,931 9,975 10,019 Width 4 14,702 14,770 14,838 14,906 14,974 15,042 15,110 15,178 15,246 15,314 Width 5
Width 6
Residential Single Family - Landscape $72,839 $72,839 $72,839 $72,839 $72,839 $72,839 $72,839 $72,839 $72,839 $72,839 Width 1 21,310 21,310 21,310 21,310 21,310 21,310 21,310 21,310 21,310 21,310 Width 2 8,448 8,448 8,448 8,448 8,448 8,448 8,448 8,448 8,448 8,448 Width 3 722 722 722 722 722 722 722 722 722 722
Width 4 202 202 202 202 202 202 202 202 202 202
Width 5 185 185 185 185 185 185 185 185 185 185
Width 6

124 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Other Revenues - Water
Operating Expenses - Water
Residential Multi-Family - Landscape $88,984 $89,429 $89,876 $90,325 $90,777 $91,231 $91,687 $92,145 $92,606 $93,069 Width 1 20,013 20,113 20,214 20,315 20,416 20,519 20,621 20,724 20,828 20,932 Width 2 7,119 7,155 7,190 7,226 7,262 7,299 7,335 7,372 7,409 7,446 Width 3 3,165 3,181 3,197 3,213 3,229 3,245 3,261 3,278 3,294 3,310 Width 4 1,458 1,465 1,472 1,480 1,487 1,494 1,502 1,509 1,517 1,525 Width 5 - - - - - - - - - -
Width 6
Commercial - Landscape $3,246,629 $3,263,807 $3,280,985 $3,298,163 $3,315,341 $3,332,519 $3,349,697 $3,366,875 $3,384,053 $3,401,231 Width 1 669,702 673,245 676,788 680,332 683,875 687,418 690,962 694,505 698,049 701,592 Width 2 101,293 101,829 102,365 102,901 103,437 103,973 104,509 105,045 105,580 106,116 Width 3 39,774 39,984 40,195 40,405 40,615 40,826 41,036 41,247 41,457 41,668 Width 4 34,859 35,044 35,228 35,412 35,597 35,781 35,966 36,150 36,335 36,519 Width 5 - - - - - - - - - -
Width 6
Governmental - Landscape $1,059,770 $1,059,770 $1,059,770 $1,059,770 $1,059,770 $1,059,770 $1,059,770 $1,059,770 $1,059,770 $1,059,770 Width 1 247,930 247,930 247,930 247,930 247,930 247,930 247,930 247,930 247,930 247,930 Width 2 30,368 30,368 30,368 30,368 30,368 30,368 30,368 30,368 30,368 30,368 Width 3 9,235 9,235 9,235 9,235 9,235 9,235 9,235 9,235 9,235 9,235 Width 4 9,004 9,004 9,004 9,004 9,004 9,004 9,004 9,004 9,004 9,004 Width 5 - - - - - - - - - -
Width 6
Industrial - Landscape $109,651 $109,651 $109,651 $109,651 $109,651 $109,651 $109,651 $109,651 $109,651 $109,651 Width 1 20,279 20,279 20,279 20,279 20,279 20,279 20,279 20,279 20,279 20,279 Width 2 3,763 3,763 3,763 3,763 3,763 3,763 3,763 3,763 3,763 3,763 Width 3 1,506 1,506 1,506 1,506 1,506 1,506 1,506 1,506 1,506 1,506 Width 4 1,407 1,407 1,407 1,407 1,407 1,407 1,407 1,407 1,407 1,407 Width 5 - - - - - - - - - -
Width 6
Other Operating Revenue $2,209,480 $2,235,687 $2,260,130 $2,285,423 $2,306,122 $2,327,389 $2,349,241 $2,371,694 $2,394,764 $2,418,468 $2,442,824 PENALTIES $677,000 $703,207 $727,650 $752,943 $773,642 $794,909 $816,761 $839,214 $862,284 $885,988 $910,344 PLAN CHECK - PUBLIC WORKS $19,326 $19,326 $19,326 $19,326 $19,326 $19,326 $19,326 $19,326 $19,326 $19,326 $19,326 UTILITY LOCATING & MARKING $6,307 $6,307 $6,307 $6,307 $6,307 $6,307 $6,307 $6,307 $6,307 $6,307 $6,307 CASHIER'S OVER & SHORTS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 MISCELLANEOUS REIMBURSEMENTS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 DAMAGE RECOVERY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MISCELLANEOUS INCOME/REFUNDS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WHOLESALE WATER SALES $215,000 $215,000 $215,000 $215,000 $215,000 $215,000 $215,000 $215,000 $215,000 $215,000 $215,000 PERMITS AND FEES $30,829 $30,829 $30,829 $30,829 $30,829 $30,829 $30,829 $30,829 $30,829 $30,829 $30,829 RETURNED CHECK FEE $13,603 $13,603 $13,603 $13,603 $13,603 $13,603 $13,603 $13,603 $13,603 $13,603 $13,603 SERVICE INSTALLATION $127,720 $127,720 $127,720 $127,720 $127,720 $127,720 $127,720 $127,720 $127,720 $127,720 $127,720 CUSTOMER CONTRIBUTIONS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 MISCELLANEOUS SERVICES $496,875 $496,875 $496,875 $496,875 $496,875 $496,875 $496,875 $496,875 $496,875 $496,875 $496,875 NEW ACCOUNT SET-UP FEE $100,800 $100,800 $100,800 $100,800 $100,800 $100,800 $100,800 $100,800 $100,800 $100,800 $100,800 FINAL NOTICE FEES $330,000 $330,000 $330,000 $330,000 $330,000 $330,000 $330,000 $330,000 $330,000 $330,000 $330,000 TURN ON/OFF FEES $66,000 $66,000 $66,000 $66,000 $66,000 $66,000 $66,000 $66,000 $66,000 $66,000 $66,000 METER FEES $126,020 $126,020 $126,020 $126,020 $126,020 $126,020 $126,020 $126,020 $126,020 $126,020 $126,020 Non-Operating Revenue $1,833,132 $911,382 $929,109 $947,191 $965,635 $984,448 $1,003,637 $1,023,210 $1,043,174 $1,063,537 $1,084,308 INTEREST ON INVESTMENTS $731,547.00 $746,178 $761,101 $776,324 $791,850 $807,687 $823,841 $840,318 $857,124 $874,266 $891,752 OTHER INTEREST INCOME $137,454.62 $140,204 $143,008 $145,868 $148,785 $151,761 $154,796 $157,892 $161,050 $164,271 $167,556 GASB31 GAIN/LOSS ON INVESTMENT $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 GAIN OR LOSS INVESTMENT SALE $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 REVENUE FROM OTHER GOV'T AGENS $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 REIMBURSED EXP-DWP $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SERVICES TO OTHER FUNDS $25,000.00 $25,000 $25,000 $25,000 $25,000 $25,000 $25,000 $25,000 $25,000 $25,000 $25,000 MWD-LOCAL RESOURCE PROJECT $902,416.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FAIR SHARE DEVELOPMENT AGMT $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PREMIUM ON SALE OF BOND $36,714.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Total Operating Expense $55,012,051 $58,968,574 $62,291,959 $65,703,913 $68,993,835 $72,439,218 $76,087,320 $79,951,521 $84,046,142 $88,386,518 $92,989,071 PERMANENT EMPLOYEES $57,551 $62,155 $67,127 $72,498 $75,398 $78,413 $81,550 $84,812 $88,205 $91,733 $95,402 SP COMP-BILINGUAL $807 $872 $941 $1,017 $1,057 $1,100 $1,144 $1,189 $1,237 $1,286 $1,338 TEMPORARY EMPLOYEES $8,148 $8,800 $9,504 $10,264 $10,675 $11,102 $11,546 $12,008 $12,488 $12,987 $13,507 SPECIAL DUTY PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PST DEFERRED COMPENSATION $106 $114 $124 $134 $139 $144 $150 $156 $162 $169 $176 LONGEVITY $140 $151 $163 $176 $183 $191 $198 $206 $215 $223 $232 PERS-NORMAL $5,506 $5,682 $5,864 $6,052 $6,245 $6,445 $6,651 $6,864 $7,084 $7,311 $7,545 MEDICARE $1,843 $1,902 $1,963 $2,026 $2,090 $2,157 $2,226 $2,298 $2,371 $2,447 $2,525 SHORT TERM DISABILITY $184 $190 $196 $202 $209 $215 $222 $229 $237 $244 $252 LONG TERM DISABILITY $392 $405 $417 $431 $445 $459 $474 $489 $504 $520 $537 WORKERS COMP $1,330 $1,373 $1,416 $1,462 $1,509 $1,557 $1,607 $1,658 $1,711 $1,766 $1,822 STATE UNEMPLOYMENT INSURANCE $61 $63 $65 $67 $69 $71 $74 $76 $78 $81 $84 HEALTH INSURANCE $8,811 $9,093 $9,384 $9,684 $9,994 $10,314 $10,644 $10,985 $11,336 $11,699 $12,073

125 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study LIFE INSURANCE $478 $493 $509 $525 $542 $560 $577 $596 $615 $635 $655 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$2,825 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SAFETY SHOES - MOU ITEM $120 $124 $128 $132 $136 $139 $143 $147 $151 $155 $160 PERMANENT EMPLOYEES $691,692 $747,027 $806,790 $871,333 $906,186 $942,433 $980,131 $1,019,336 $1,060,109 $1,102,514 $1,146,614 SPECIAL ASSIGNMENT PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $3,875 $4,185 $4,520 $4,881 $5,077 $5,280 $5,491 $5,711 $5,939 $6,177 $6,424 TEMPORARY EMPLOYEES $25,278 $27,300 $29,484 $31,843 $33,117 $34,441 $35,819 $37,252 $38,742 $40,292 $41,903 OVERTIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
AUTO ALLOWANCE $1,152 $1,193 $1,236 $1,280 $1,326 $1,373 $1,422 $1,473 $1,526 $1,581 $1,637 DEFERRED COMPENSATION MATCH $4,258 $4,599 $4,967 $5,364 $5,578 $5,802 $6,034 $6,275 $6,526 $6,787 $7,058 PST DEFERRED COMPENSATION $329 $355 $384 $414 $431 $448 $466 $485 $504 $524 $545 TIERED EMP DEF COMPENSATION $1,572 $1,698 $1,834 $1,980 $2,059 $2,142 $2,228 $2,317 $2,409 $2,506 $2,606 TIERED RHS BENEFIT $1,312 $1,354 $1,397 $1,442 $1,488 $1,536 $1,585 $1,636 $1,688 $1,742 $1,798 LONGEVITY $4,200 $4,334 $4,473 $4,616 $4,764 $4,916 $5,074 $5,236 $5,404 $5,577 $5,755 ANNUAL LEAVE BUYBACK $17,308 $17,862 $18,433 $19,023 $19,632 $20,260 $20,909 $21,578 $22,268 $22,981 $23,716 ANNUAL LEAVE OVER MAX $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERS-NORMAL $84,195 $86,889 $89,670 $92,539 $95,500 $98,556 $101,710 $104,965 $108,324 $111,790 $115,367 MEDICARE $21,922 $22,624 $23,347 $24,095 $24,866 $25,661 $26,482 $27,330 $28,204 $29,107 $30,038 SHORT TERM DISABILITY $2,211 $2,282 $2,355 $2,430 $2,508 $2,588 $2,671 $2,756 $2,845 $2,936 $3,030 LONG TERM DISABILITY $4,703 $4,853 $5,009 $5,169 $5,335 $5,505 $5,681 $5,863 $6,051 $6,244 $6,444 WORKERS COMP $14,450 $14,912 $15,390 $15,882 $16,390 $16,915 $17,456 $18,015 $18,591 $19,186 $19,800 STATE UNEMPLOYMENT INSURANCE $676 $699 $723 $747 $773 $799 $826 $854 $883 $913 $944 HEALTH INSURANCE $110,018 $113,759 $117,626 $121,626 $125,761 $130,037 $134,458 $139,030 $143,757 $148,644 $153,698 OPT OUT HEALTH INSURANCE $4,008 $4,144 $4,285 $4,431 $4,582 $4,737 $4,898 $5,065 $5,237 $5,415 $5,599 LIFE INSURANCE $5,738 $5,933 $6,135 $6,343 $6,559 $6,782 $7,013 $7,251 $7,498 $7,753 $8,016 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$160,064 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MINOR EQUIPMENT & FURNITURE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 CONSTRUCTION MATERIALS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY MATERIALS/CONSTRUCTION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 COMPUTER EQUIPMENT & SOFTWARE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY SHOES - MOU ITEM $1,668 $1,726 $1,786 $1,835 $1,886 $1,937 $1,991 $2,045 $2,102 $2,159 $2,219 WIRELESS COMMUNICATION $1,700 $1,759 $1,820 $1,870 $1,922 $1,975 $2,029 $2,085 $2,142 $2,201 $2,261 POSTAGE & SHIPPING $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OFFICE SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROGRAM EXPENDITURES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MILEAGE/VEHICLE EXP REIMB $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MEMBERSHIP & DUES $730 $755 $782 $803 $825 $848 $871 $895 $920 $945 $971 CONFERENCE, TRAINING & TRAVEL $35,990 $37,241 $38,536 $39,595 $40,683 $41,802 $42,951 $44,132 $45,345 $46,591 $47,872 EDUCATIONAL REIMBURSEMENTS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES $558,721 $603,419 $651,692 $703,828 $731,981 $761,260 $791,710 $823,379 $856,314 $890,566 $926,189 SHIFT DIFFERENTIAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $3,438 $3,713 $4,010 $4,331 $4,504 $4,684 $4,872 $5,067 $5,269 $5,480 $5,699 TEMPORARY EMPLOYEES $8,372 $9,042 $9,765 $10,546 $10,968 $11,407 $11,863 $12,338 $12,831 $13,344 $13,878 OVERTIME $7,416 $8,009 $8,650 $9,342 $9,716 $10,104 $10,509 $10,929 $11,366 $11,821 $12,293 AUTO ALLOWANCE $2,822 $2,923 $3,027 $3,136 $3,248 $3,364 $3,484 $3,609 $3,738 $3,872 $4,010 DEFERRED COMPENSATION MATCH $4,351 $4,490 $4,634 $4,782 $4,935 $5,093 $5,256 $5,424 $5,598 $5,777 $5,962 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $1,080 $1,115 $1,150 $1,187 $1,225 $1,264 $1,305 $1,346 $1,390 $1,434 $1,480 TIERED RHS BENEFIT $1,080 $1,115 $1,150 $1,187 $1,225 $1,264 $1,305 $1,346 $1,390 $1,434 $1,480 LONGEVITY $7,236 $7,468 $7,707 $7,953 $8,208 $8,470 $8,741 $9,021 $9,310 $9,608 $9,915 ANNUAL LEAVE BUYBACK $13,564 $13,998 $14,446 $14,908 $15,385 $15,878 $16,386 $16,910 $17,451 $18,010 $18,586 ANNUAL LEAVE OVER MAX $950 $980 $1,012 $1,044 $1,078 $1,112 $1,148 $1,184 $1,222 $1,261 $1,302 PERS-NORMAL $69,508 $71,732 $74,028 $76,397 $78,841 $81,364 $83,968 $86,655 $89,428 $92,289 $95,243 MEDICARE $17,887 $18,459 $19,050 $19,660 $20,289 $20,938 $21,608 $22,300 $23,013 $23,750 $24,510 SHORT TERM DISABILITY $1,786 $1,843 $1,902 $1,963 $2,026 $2,091 $2,158 $2,227 $2,298 $2,371 $2,447 LONG TERM DISABILITY $3,798 $3,920 $4,045 $4,174 $4,308 $4,446 $4,588 $4,735 $4,886 $5,043 $5,204 WORKERS COMP $11,579 $11,950 $12,332 $12,727 $13,134 $13,554 $13,988 $14,435 $14,897 $15,374 $15,866 STATE UNEMPLOYMENT INSURANCE $547 $566 $585 $605 $625 $647 $669 $691 $715 $739 $764 HEALTH INSURANCE $128,863 $133,244 $137,775 $142,459 $147,303 $152,311 $157,489 $162,844 $168,381 $174,106 $180,025 RETIREES HEALTH INSURANCE/OPEB $514,031 $531,508 $549,579 $568,265 $587,586 $607,564 $628,221 $649,581 $671,666 $694,503 $718,116 OPT OUT HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LIFE INSURANCE $4,640 $4,798 $4,961 $5,130 $5,304 $5,484 $5,671 $5,864 $6,063 $6,269 $6,482 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$93,753 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MINOR EQUIPMENT & FURNITURE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 CONSTRUCTION MATERIALS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY MATERIALS/CONSTRUCTION $250 $265 $280 $297 $314 $326 $339 $353 $367 $381 $396 COMPUTER EQUIPMENT & SOFTWARE $1,451 $1,501 $1,554 $1,596 $1,640 $1,685 $1,732 $1,779 $1,828 $1,878 $1,930 SAFETY SHOES - MOU ITEM $150 $155 $161 $165 $170 $174 $179 $184 $189 $194 $200 ADVERTISING EXPENSE $675 $698 $723 $743 $763 $784 $806 $828 $850 $874 $898 WIRELESS COMMUNICATION $5,359 $5,545 $5,738 $5,896 $6,058 $6,224 $6,395 $6,571 $6,752 $6,938 $7,128 PHONES, FAX, ISDN LINES $12,118 $12,539 $12,975 $13,332 $13,698 $14,075 $14,462 $14,859 $15,268 $15,687 $16,119 POSTAGE & SHIPPING $4,250 $4,398 $4,551 $4,676 $4,804 $4,936 $5,072 $5,211 $5,355 $5,502 $5,653 OFFICE SUPPLIES $6,000 $6,209 $6,424 $6,601 $6,782 $6,969 $7,160 $7,357 $7,560 $7,767 $7,981 PROGRAM EXPENDITURES $10,373 $10,734 $11,107 $11,412 $11,726 $12,048 $12,379 $12,720 $13,069 $13,428 $13,798 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $600 $621 $642 $660 $678 $697 $716 $736 $756 $777 $798 UNLEADED FUEL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
RENTS & LEASES $873,427 $903,787 $935,203 $960,912 $987,327 $1,014,469 $1,042,357 $1,071,011 $1,100,453 $1,130,704 $1,161,788 MILEAGE/VEHICLE EXP REIMB $250 $259 $268 $278 $288 $298 $309 $320 $331 $343 $355 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $85,499 $88,471 $91,547 $94,063 $96,649 $99,306 $102,036 $104,841 $107,723 $110,684 $113,727 INSURANCE & SURETY BONDS $54,282 $56,169 $58,121 $59,719 $61,361 $63,048 $64,781 $66,562 $68,391 $70,271 $72,203

126 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study INSURANCE PREMIUMS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MEMBERSHIP & DUES $72,496 $75,016 $77,624 $79,757 $81,950 $84,203 $86,517 $88,896 $91,340 $93,850 $96,430 CONFERENCE, TRAINING & TRAVEL $12,000 $12,417 $12,849 $13,202 $13,565 $13,938 $14,321 $14,715 $15,119 $15,535 $15,962 LEGAL SERVICES-SPECIAL COUNSEL $22,500 $23,282 $24,091 $24,754 $25,434 $26,133 $26,852 $27,590 $28,348 $29,128 $29,928 BOOKS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OUTSIDE LAB ANALYSIS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
JOB REQ CERTIFICATES & LICENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 BAD DEBTS EXPENSE $145,603 $150,664 $155,901 $160,187 $164,591 $169,115 $173,764 $178,541 $183,449 $188,492 $193,674 DEPRECIATION EXPENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
ADMINISTRATIVE SERVICES CHARGE $2,775,604 $2,872,084 $2,971,918 $3,053,616 $3,137,560 $3,223,811 $3,312,434 $3,403,492 $3,497,054 $3,593,188 $3,691,965 INTERNAL SVC CHRG-WAREHOUSE $313,149 $324,034 $335,297 $344,515 $353,986 $363,717 $373,715 $383,989 $394,544 $405,390 $416,535 INTERNAL SVC CHRG-INFO TECH $2,015,331 $2,085,384 $2,157,872 $2,217,192 $2,278,142 $2,340,768 $2,405,116 $2,471,233 $2,539,167 $2,608,969 $2,680,689 LOSS ON FIXED ASSET DISPOSAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES $121,106 $130,794 $141,258 $152,559 $158,661 $165,007 $171,608 $178,472 $185,611 $193,035 $200,757 OVERTIME $873 $943 $1,018 $1,100 $1,144 $1,189 $1,237 $1,287 $1,338 $1,392 $1,447 DEFERRED COMPENSATION MATCH $250 $270 $292 $315 $328 $341 $354 $368 $383 $398 $414 TIERED EMP DEF COMPENSATION $300 $324 $350 $378 $393 $409 $425 $442 $460 $478 $497 TIERED RHS BENEFIT $100 $108 $117 $126 $131 $136 $142 $147 $153 $159 $166 LONGEVITY $500 $540 $583 $630 $655 $681 $709 $737 $766 $797 $829 PERS-NORMAL $14,631 $15,099 $15,582 $16,081 $16,596 $17,127 $17,675 $18,240 $18,824 $19,426 $20,048 MEDICARE $3,740 $3,860 $3,983 $4,111 $4,242 $4,378 $4,518 $4,663 $4,812 $4,966 $5,125 SHORT TERM DISABILITY $388 $400 $413 $426 $440 $454 $469 $484 $499 $515 $532 LONG TERM DISABILITY $824 $850 $878 $906 $935 $965 $995 $1,027 $1,060 $1,094 $1,129 WORKERS COMP $2,467 $2,546 $2,627 $2,711 $2,798 $2,888 $2,980 $3,076 $3,174 $3,276 $3,380 STATE UNEMPLOYMENT INSURANCE $113 $117 $121 $125 $129 $134 $138 $143 $148 $153 $158 HEALTH INSURANCE $9,300 $9,616 $9,943 $10,281 $10,631 $10,992 $11,366 $11,752 $12,152 $12,565 $12,992 OPT OUT HEALTH INSURANCE $3,600 $3,722 $3,849 $3,980 $4,115 $4,255 $4,400 $4,549 $4,704 $4,864 $5,029 LIFE INSURANCE $1,003 $1,037 $1,072 $1,109 $1,147 $1,186 $1,226 $1,267 $1,311 $1,355 $1,401 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$10,969 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CONSTRUCTION MATERIALS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY MATERIALS/CONSTRUCTION $500 $529 $560 $593 $628 $653 $678 $705 $733 $762 $793 COMPUTER EQUIPMENT & SOFTWARE $1,853 $1,917 $1,984 $2,039 $2,095 $2,152 $2,211 $2,272 $2,335 $2,399 $2,465 SAFETY SHOES - MOU ITEM $450 $466 $482 $495 $509 $523 $537 $552 $567 $583 $599 WIRELESS COMMUNICATION $734 $760 $786 $808 $830 $853 $876 $900 $925 $950 $976 POSTAGE & SHIPPING $2,408 $2,492 $2,578 $2,649 $2,722 $2,797 $2,874 $2,953 $3,034 $3,117 $3,203 OFFICE SUPPLIES $500 $517 $535 $550 $565 $581 $597 $613 $630 $647 $665 PROGRAM EXPENDITURES $300 $310 $321 $330 $339 $348 $358 $368 $378 $388 $399 RECYCLED CONTENT PRODUCTS $50 $52 $54 $55 $57 $58 $60 $61 $63 $65 $67 MOTOR POOL RENTAL - OPS & MTCE $2,090 $2,165 $2,242 $2,322 $2,405 $2,491 $2,581 $2,673 $2,769 $2,868 $2,970 MILEAGE/VEHICLE EXP REIMB $150 $155 $161 $167 $173 $179 $185 $192 $199 $206 $213 PROF. & CONT. SVCS $625,715 $647,465 $669,971 $688,388 $707,312 $726,756 $746,735 $767,262 $788,354 $810,026 $832,294 CONFERENCE, TRAINING & TRAVEL $3,780 $3,911 $4,047 $4,159 $4,273 $4,390 $4,511 $4,635 $4,763 $4,893 $5,028 OUTSIDE LAB ANALYSIS $91,713 $94,901 $98,200 $100,899 $103,673 $106,523 $109,451 $112,460 $115,552 $118,728 $121,992 REGULATORY PERMIT & USE FEES $190,844 $197,478 $204,342 $209,959 $215,731 $221,662 $227,755 $234,016 $240,449 $247,059 $253,851 PERMANENT EMPLOYEES $2,110,117 $2,278,927 $2,461,241 $2,658,140 $2,764,465 $2,875,044 $2,990,046 $3,109,648 $3,234,034 $3,363,395 $3,497,931 SHIFT DIFFERENTIAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $8,691 $9,386 $10,137 $10,948 $11,386 $11,842 $12,315 $12,808 $13,320 $13,853 $14,407 SP COMP-GRADE 4 CERT PAY $35,640 $38,491 $41,570 $44,896 $46,692 $48,560 $50,502 $52,522 $54,623 $56,808 $59,080 SP COMP-GRADE 5 CERT PAY $52,463 $56,660 $61,193 $66,088 $68,732 $71,481 $74,340 $77,314 $80,406 $83,623 $86,968 OVERTIME $268,005 $289,445 $312,601 $337,609 $351,113 $365,158 $379,764 $394,955 $410,753 $427,183 $444,271 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $20,279 $21,901 $23,653 $25,546 $26,568 $27,630 $28,735 $29,885 $31,080 $32,323 $33,616 DEFERRED COMPENSATION MATCH $9,297 $10,041 $10,844 $11,712 $12,180 $12,667 $13,174 $13,701 $14,249 $14,819 $15,412 TIERED EMP DEF COMPENSATION $4,470 $4,828 $5,214 $5,631 $5,856 $6,090 $6,334 $6,587 $6,851 $7,125 $7,410 TIERED RHS BENEFIT $3,082 $3,181 $3,282 $3,387 $3,496 $3,608 $3,723 $3,842 $3,965 $4,092 $4,223 LONGEVITY $9,588 $9,895 $10,211 $10,538 $10,875 $11,223 $11,583 $11,953 $12,336 $12,730 $13,138 ANNUAL LEAVE BUYBACK $18,364 $18,952 $19,558 $20,184 $20,830 $21,496 $22,184 $22,894 $23,627 $24,383 $25,163 ANNUAL LEAVE OVER MAX $1,342 $1,385 $1,429 $1,475 $1,522 $1,571 $1,621 $1,673 $1,727 $1,782 $1,839 PERS-NORMAL $258,999 $267,287 $275,840 $284,667 $293,776 $303,177 $312,879 $322,891 $333,223 $343,886 $354,891 MEDICARE $75,798 $78,224 $80,727 $83,310 $85,976 $88,727 $91,566 $94,496 $97,520 $100,641 $103,862 SHORT TERM DISABILITY $6,753 $6,969 $7,192 $7,423 $7,660 $7,905 $8,158 $8,419 $8,689 $8,967 $9,254 LONG TERM DISABILITY $14,348 $14,807 $15,281 $15,770 $16,274 $16,795 $17,333 $17,887 $18,460 $19,050 $19,660 WORKERS COMP $45,245 $46,693 $48,187 $49,729 $51,321 $52,963 $54,658 $56,407 $58,212 $60,075 $61,997 STATE UNEMPLOYMENT INSURANCE $2,288 $2,366 $2,447 $2,530 $2,616 $2,705 $2,797 $2,892 $2,990 $3,092 $3,197 HEALTH INSURANCE $417,439 $431,632 $446,307 $461,482 $477,172 $493,396 $510,172 $527,517 $545,453 $563,998 $583,174 OPT OUT HEALTH INSURANCE $21,384 $22,111 $22,863 $23,640 $24,444 $25,275 $26,134 $27,023 $27,942 $28,892 $29,874 LIFE INSURANCE $17,513 $18,108 $18,724 $19,361 $20,019 $20,700 $21,403 $22,131 $22,884 $23,662 $24,466 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$238,207 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $61,634 $66,565 $71,890 $77,641 $80,747 $83,977 $87,336 $90,830 $94,463 $98,241 $102,171 MINOR EQUIPMENT & FURNITURE $22,200 $22,972 $23,770 $24,424 $25,095 $25,785 $26,494 $27,222 $27,970 $28,739 $29,529 CONSTRUCTION MATERIALS $16,800 $17,783 $18,823 $19,925 $21,091 $21,927 $22,797 $23,701 $24,642 $25,619 $26,636 SAFETY MATERIALS/CONSTRUCTION $5,400 $5,716 $6,050 $6,404 $6,779 $7,048 $7,328 $7,618 $7,921 $8,235 $8,561 COMPUTER EQUIPMENT & SOFTWARE $21,633 $22,385 $23,163 $23,800 $24,454 $25,126 $25,817 $26,527 $27,256 $28,005 $28,775 UNIFORM EXPENSE $9,029 $9,343 $9,668 $9,933 $10,206 $10,487 $10,775 $11,072 $11,376 $11,689 $12,010 SAFETY SHOES - MOU ITEM $6,837 $7,075 $7,321 $7,522 $7,729 $7,941 $8,159 $8,384 $8,614 $8,851 $9,094 ADVERTISING EXPENSE $2,700 $2,794 $2,891 $2,970 $3,052 $3,136 $3,222 $3,311 $3,402 $3,495 $3,591 WIRELESS COMMUNICATION $34,307 $35,500 $36,733 $37,743 $38,781 $39,847 $40,942 $42,068 $43,224 $44,413 $45,633 POSTAGE & SHIPPING $225 $233 $241 $248 $254 $261 $269 $276 $283 $291 $299 OFFICE SUPPLIES $600 $621 $642 $660 $678 $697 $716 $736 $756 $777 $798 FIRST AID KIT SUPPLIES $204 $211 $218 $224 $231 $237 $243 $250 $257 $264 $271 PROGRAM EXPENDITURES $4,179 $4,324 $4,475 $4,598 $4,724 $4,854 $4,987 $5,124 $5,265 $5,410 $5,559 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $60 $62 $64 $66 $68 $70 $72 $74 $76 $78 $80 ELECTRIC UTILITY $6,210,453 $6,423,291 $6,643,424 $6,871,101 $7,106,580 $7,350,130 $7,602,026 $7,862,555 $8,132,013 $8,410,705 $8,698,948 NATURAL GAS UTILITY $1,882 $1,946 $2,013 $2,082 $2,154 $2,227 $2,304 $2,383 $2,464 $2,549 $2,636 WATER UTILITY $58,644 $60,654 $62,732 $64,882 $67,106 $69,406 $71,784 $74,244 $76,789 $79,421 $82,142

127 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study RECYCLED WATER UTILITY $7,275 $7,524 $7,782 $8,049 $8,325 $8,610 $8,905 $9,210 $9,526 $9,852 $10,190 UNLEADED FUEL $1,740 $1,802 $1,867 $1,933 $2,003 $2,074 $2,148 $2,225 $2,305 $2,387 $2,473 DIESEL FUEL $3,300 $3,418 $3,540 $3,667 $3,798 $3,934 $4,075 $4,220 $4,371 $4,528 $4,690 RENTS & LEASES $17,795 $18,414 $19,054 $19,577 $20,116 $20,669 $21,237 $21,821 $22,420 $23,037 $23,670 MOTOR POOL RENTAL - OPS & MTCE $114,282 $118,370 $122,603 $126,989 $131,531 $136,235 $141,108 $146,156 $151,383 $156,798 $162,406 DIRECT VEHICLE EXPENSE $14,100 $14,604 $15,127 $15,668 $16,228 $16,809 $17,410 $18,033 $18,678 $19,346 $20,038 MTCE & REPAIR - EQUIP & FAC $7,561 $7,831 $8,112 $8,402 $8,702 $9,013 $9,336 $9,670 $10,016 $10,374 $10,745 SCADA MAINTENANCE $370,014 $382,876 $396,184 $407,076 $418,266 $429,764 $441,578 $453,717 $466,190 $479,006 $492,174 MOWING/LANDSCAPE CONTRACTS $179,690 $185,936 $192,399 $197,688 $203,123 $208,707 $214,444 $220,339 $226,396 $232,620 $239,014 TREE MAINTENANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROF. & CONT. SVCS $185,300 $191,741 $198,406 $203,860 $209,464 $215,222 $221,139 $227,218 $233,464 $239,882 $246,476 REFUSE DISPOSAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CONFERENCE, TRAINING & TRAVEL $10,000 $10,348 $10,707 $11,002 $11,304 $11,615 $11,934 $12,262 $12,599 $12,946 $13,301 CHEMICALS-CORRSN & SCALE INHIB $163,125 $171,771 $180,874 $190,461 $200,555 $211,185 $222,377 $234,163 $246,574 $259,643 $273,404 CHEMICALS-POLYMER $187,000 $196,911 $207,347 $218,337 $229,909 $242,094 $254,925 $268,436 $282,663 $297,644 $313,419 CHEMICALS-ALUM $146,111 $153,855 $162,009 $170,596 $179,637 $189,158 $199,183 $209,740 $220,856 $232,562 $244,888 CHEMICALS-AMMONIA $72,807 $76,666 $80,729 $85,008 $89,513 $94,257 $99,253 $104,513 $110,053 $115,885 $122,027 CHEMICALS-ANTISCALANT $213,266 $224,569 $236,471 $249,004 $262,201 $276,098 $290,731 $306,140 $322,366 $339,451 $357,442 CHEMICALS-SULFURIC ACID $268,000 $282,204 $297,161 $312,910 $329,495 $346,958 $365,347 $384,710 $405,100 $426,570 $449,178 CHEMICALS-CAUSTIC SODA $41,472 $43,670 $45,985 $48,422 $50,988 $53,690 $56,536 $59,532 $62,688 $66,010 $69,509 CHEMICALS-SODIUM HYPOCHLORITE $445,000 $468,585 $493,420 $519,571 $547,109 $576,105 $606,639 $638,791 $672,647 $708,297 $745,837 CHEMICALS-MISC $82,400 $86,767 $91,366 $96,208 $101,307 $106,677 $112,330 $118,284 $124,553 $131,154 $138,105 OUTSIDE LAB ANALYSIS $453,216 $468,970 $485,271 $498,611 $512,318 $526,402 $540,873 $555,741 $571,018 $586,716 $602,845 JOB REQ CERTIFICATES & LICENSE $1,210 $1,252 $1,296 $1,331 $1,368 $1,405 $1,444 $1,484 $1,525 $1,566 $1,609 RAW WATER PURCHASES $16,371,264 $17,609,534 $18,941,463 $20,374,135 $21,915,170 $23,572,763 $25,355,732 $27,273,559 $29,336,444 $31,555,359 $33,942,105 TREATED WATER PURCHASES $3,569,117 $3,839,074 $4,129,449 $4,441,787 $4,777,750 $5,139,124 $5,527,831 $5,945,938 $6,395,670 $6,879,418 $7,399,755 LAB CHEMICALS AND SUPPLIES $53,724 $56,571 $59,570 $62,727 $66,051 $69,552 $73,238 $77,120 $81,207 $85,511 $90,043 PREVENTION & MAINTENANCE MATLS $400,703 $414,631 $429,044 $440,838 $452,957 $465,409 $478,203 $491,349 $504,856 $518,734 $532,994 INLAND EMPIRE BRINE LINE-SARI $1,589,692 $1,644,950 $1,702,128 $1,748,920 $1,796,997 $1,846,397 $1,897,154 $1,949,307 $2,002,894 $2,057,953 $2,114,526 FINES AND PENALTIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CARBON DIOXIDE $41,200 $43,384 $45,683 $48,104 $50,654 $53,338 $56,165 $59,142 $62,276 $65,577 $69,053 PERMANENT EMPLOYEES $598,467 $646,344 $698,051 $753,896 $784,051 $815,413 $848,030 $881,951 $917,229 $953,918 $992,075 SPECIAL ASSIGNMENT PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $7,746 $8,366 $9,035 $9,758 $10,148 $10,554 $10,976 $11,415 $11,872 $12,347 $12,841 SP COMP-GRADE 4 CERT PAY $6,240 $6,739 $7,278 $7,861 $8,175 $8,502 $8,842 $9,196 $9,564 $9,946 $10,344 SP COMP-GRADE 5 CERT PAY $15,551 $16,795 $18,139 $19,590 $20,373 $21,188 $22,036 $22,917 $23,834 $24,787 $25,779 OVERTIME $146,755 $158,495 $171,175 $184,869 $192,264 $199,954 $207,953 $216,271 $224,921 $233,918 $243,275 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $7,077 $7,643 $8,255 $8,915 $9,272 $9,642 $10,028 $10,429 $10,846 $11,280 $11,732 DEFERRED COMPENSATION MATCH $3,328 $3,594 $3,882 $4,192 $4,360 $4,534 $4,716 $4,904 $5,101 $5,305 $5,517 TIERED EMP DEF COMPENSATION $3,120 $3,220 $3,323 $3,429 $3,539 $3,652 $3,769 $3,890 $4,014 $4,143 $4,275 TIERED RHS BENEFIT $1,248 $1,288 $1,329 $1,372 $1,416 $1,461 $1,508 $1,556 $1,606 $1,657 $1,710 LONGEVITY $3,796 $3,917 $4,043 $4,172 $4,306 $4,443 $4,586 $4,732 $4,884 $5,040 $5,201 ANNUAL LEAVE BUYBACK $9,634 $9,942 $10,260 $10,589 $10,928 $11,277 $11,638 $12,011 $12,395 $12,792 $13,201 ANNUAL LEAVE OVER MAX $1,833 $1,892 $1,952 $2,015 $2,079 $2,146 $2,214 $2,285 $2,358 $2,434 $2,512 PERS-NORMAL $76,234 $78,673 $81,191 $83,789 $86,470 $89,237 $92,093 $95,040 $98,081 $101,220 $104,459 MEDICARE $24,203 $24,977 $25,776 $26,601 $27,452 $28,331 $29,237 $30,173 $31,139 $32,135 $33,163 SHORT TERM DISABILITY $1,910 $1,971 $2,034 $2,100 $2,167 $2,236 $2,308 $2,381 $2,458 $2,536 $2,617 LONG TERM DISABILITY $4,064 $4,194 $4,328 $4,467 $4,610 $4,757 $4,909 $5,066 $5,229 $5,396 $5,569 WORKERS COMP $12,872 $13,284 $13,709 $14,148 $14,600 $15,067 $15,550 $16,047 $16,561 $17,091 $17,638 STATE UNEMPLOYMENT INSURANCE $732 $757 $783 $809 $837 $865 $895 $925 $957 $989 $1,023 HEALTH INSURANCE $163,427 $168,984 $174,729 $180,670 $186,813 $193,164 $199,732 $206,523 $213,544 $220,805 $228,312 OPT OUT HEALTH INSURANCE $14,976 $15,485 $16,012 $16,556 $17,119 $17,701 $18,303 $18,925 $19,569 $20,234 $20,922 LIFE INSURANCE $4,966 $5,135 $5,309 $5,490 $5,676 $5,869 $6,069 $6,275 $6,489 $6,709 $6,937 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$74,741 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS -$1,560 -$1,685 -$1,820 -$1,965 -$2,044 -$2,126 -$2,211 -$2,299 -$2,391 -$2,487 -$2,586 MINOR EQUIPMENT & FURNITURE $36,120 $37,376 $38,675 $39,738 $40,830 $41,953 $43,106 $44,291 $45,509 $46,760 $48,045 CONSTRUCTION MATERIALS $466,299 $493,582 $522,462 $553,031 $585,389 $608,611 $632,755 $657,856 $683,953 $711,086 $739,294 SAFETY MATERIALS/CONSTRUCTION $32,300 $34,190 $36,190 $38,308 $40,549 $42,158 $43,830 $45,569 $47,377 $49,256 $51,210 COMPUTER EQUIPMENT & SOFTWARE $3,008 $3,113 $3,221 $3,309 $3,400 $3,494 $3,590 $3,688 $3,790 $3,894 $4,001 UNIFORM EXPENSE $8,075 $8,356 $8,646 $8,884 $9,128 $9,379 $9,637 $9,902 $10,174 $10,454 $10,741 SAFETY SHOES - MOU ITEM $2,652 $2,744 $2,840 $2,918 $2,998 $3,080 $3,165 $3,252 $3,341 $3,433 $3,528 ADVERTISING EXPENSE $900 $931 $964 $990 $1,017 $1,045 $1,074 $1,104 $1,134 $1,165 $1,197 WIRELESS COMMUNICATION $10,160 $10,513 $10,879 $11,178 $11,485 $11,801 $12,125 $12,458 $12,801 $13,153 $13,514 PHONES, FAX, ISDN LINES $200 $207 $214 $220 $226 $232 $239 $245 $252 $259 $266 POSTAGE & SHIPPING $50 $52 $54 $55 $57 $58 $60 $61 $63 $65 $67 OFFICE SUPPLIES $536 $555 $574 $590 $606 $623 $640 $657 $675 $694 $713 PROGRAM EXPENDITURES $19,936 $20,629 $21,346 $21,933 $22,536 $23,155 $23,792 $24,446 $25,118 $25,808 $26,518 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $54 $56 $58 $59 $61 $63 $64 $66 $68 $70 $72 UNLEADED FUEL $550 $570 $590 $611 $633 $656 $679 $703 $729 $755 $782 DIESEL FUEL $300 $311 $322 $333 $345 $358 $370 $384 $397 $412 $426 RENTS & LEASES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MOTOR POOL RENTAL - OPS & MTCE $264,792 $274,263 $284,073 $294,234 $304,758 $315,658 $326,949 $338,643 $350,756 $363,302 $376,296 RETAINED VEHICLE EXPENSE $2,328 $2,411 $2,498 $2,587 $2,679 $2,775 $2,874 $2,977 $3,084 $3,194 $3,308 DIRECT VEHICLE EXPENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 OTHER EQUIPMENT RENTAL $60,473 $62,575 $64,750 $66,530 $68,359 $70,238 $72,169 $74,153 $76,191 $78,286 $80,438 MILEAGE/VEHICLE EXP REIMB $810 $839 $869 $900 $932 $966 $1,000 $1,036 $1,073 $1,111 $1,151 MTCE & REPAIR - EQUIP & FAC $60,792 $62,905 $65,091 $66,881 $68,719 $70,608 $72,549 $74,544 $76,593 $78,698 $80,862 MOWING/LANDSCAPE CONTRACTS $4,040 $4,180 $4,326 $4,445 $4,567 $4,692 $4,821 $4,954 $5,090 $5,230 $5,374 PROF. & CONT. SVCS $700,299 $724,642 $749,830 $770,443 $791,623 $813,384 $835,744 $858,719 $882,325 $906,580 $931,502

128 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study CONFERENCE, TRAINING & TRAVEL $5,100 $5,277 $5,461 $5,611 $5,765 $5,924 $6,086 $6,254 $6,426 $6,602 $6,784 JOB REQ CERTIFICATES & LICENSE $1,575 $1,630 $1,686 $1,733 $1,780 $1,829 $1,880 $1,931 $1,984 $2,039 $2,095 PREVENTION & MAINTENANCE MATLS $1,198,924 $1,240,599 $1,283,722 $1,319,011 $1,355,271 $1,392,527 $1,430,808 $1,470,141 $1,510,555 $1,552,080 $1,594,747 LICENSED VEHICLES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERMANENT EMPLOYEES $790,850 $854,118 $922,447 $996,243 $1,036,093 $1,077,537 $1,120,638 $1,165,464 $1,212,082 $1,260,566 $1,310,988 SP COMP-BILINGUAL $2,366 $2,555 $2,760 $2,980 $3,100 $3,224 $3,353 $3,487 $3,626 $3,771 $3,922 SP COMP-GRADE 4 CERT PAY $6,240 $6,739 $7,278 $7,861 $8,175 $8,502 $8,842 $9,196 $9,564 $9,946 $10,344 SP COMP-GRADE 5 CERT PAY $19,188 $20,723 $22,381 $24,171 $25,138 $26,144 $27,189 $28,277 $29,408 $30,584 $31,808 TEMPORARY EMPLOYEES $13,190 $14,245 $15,385 $16,616 $17,280 $17,971 $18,690 $19,438 $20,215 $21,024 $21,865 OVERTIME $55,247 $59,667 $64,440 $69,595 $72,379 $75,274 $78,285 $81,417 $84,673 $88,060 $91,583 SPECIAL DUTY PAY $9,187 $9,922 $10,716 $11,573 $12,036 $12,517 $13,018 $13,539 $14,080 $14,644 $15,229 DEFERRED COMPENSATION MATCH $2,250 $2,430 $2,624 $2,834 $2,948 $3,066 $3,188 $3,316 $3,448 $3,586 $3,730 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $1,860 $1,920 $1,981 $2,044 $2,110 $2,177 $2,247 $2,319 $2,393 $2,470 $2,549 TIERED RHS BENEFIT $820 $846 $873 $901 $930 $960 $991 $1,022 $1,055 $1,089 $1,124 LONGEVITY $2,564 $2,646 $2,731 $2,818 $2,908 $3,001 $3,097 $3,197 $3,299 $3,404 $3,513 ANNUAL LEAVE BUYBACK $8,237 $8,501 $8,773 $9,053 $9,343 $9,642 $9,951 $10,269 $10,598 $10,937 $11,287 ANNUAL LEAVE OVER MAX $1,255 $1,295 $1,337 $1,379 $1,424 $1,469 $1,516 $1,565 $1,615 $1,666 $1,720 PERS-NORMAL $100,588 $103,807 $107,129 $110,557 $114,095 $117,746 $121,513 $125,402 $129,415 $133,556 $137,830 MEDICARE $27,239 $28,111 $29,010 $29,939 $30,897 $31,885 $32,906 $33,959 $35,045 $36,167 $37,324 SHORT TERM DISABILITY $2,535 $2,616 $2,700 $2,786 $2,875 $2,967 $3,062 $3,160 $3,261 $3,366 $3,474 LONG TERM DISABILITY $5,385 $5,557 $5,735 $5,919 $6,108 $6,304 $6,505 $6,713 $6,928 $7,150 $7,379 WORKERS COMP $17,049 $17,595 $18,158 $18,739 $19,338 $19,957 $20,596 $21,255 $21,935 $22,637 $23,361 STATE UNEMPLOYMENT INSURANCE $828 $856 $885 $915 $946 $979 $1,012 $1,046 $1,082 $1,119 $1,157 HEALTH INSURANCE $160,408 $165,862 $171,501 $177,332 $183,362 $189,596 $196,042 $202,707 $209,600 $216,726 $224,095 OPT OUT HEALTH INSURANCE $16,224 $16,776 $17,346 $17,936 $18,546 $19,176 $19,828 $20,502 $21,199 $21,920 $22,665 LIFE INSURANCE $6,569 $6,792 $7,023 $7,262 $7,509 $7,764 $8,028 $8,301 $8,583 $8,875 $9,177 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$122,985 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $48,153 $52,005 $56,166 $60,659 $63,085 $65,609 $68,233 $70,962 $73,801 $76,753 $79,823 MINOR EQUIPMENT & FURNITURE $35,400 $36,631 $37,904 $38,946 $40,016 $41,116 $42,247 $43,408 $44,601 $45,827 $47,087 CONSTRUCTION MATERIALS $1,049,733 $1,111,153 $1,176,167 $1,244,984 $1,317,828 $1,370,107 $1,424,459 $1,480,967 $1,539,717 $1,600,798 $1,664,301 SAFETY MATERIALS/CONSTRUCTION $20,000 $21,170 $22,409 $23,720 $25,108 $26,104 $27,139 $28,216 $29,335 $30,499 $31,709 COMPUTER EQUIPMENT & SOFTWARE $4,365 $4,517 $4,674 $4,802 $4,934 $5,070 $5,209 $5,352 $5,500 $5,651 $5,806 UNIFORM EXPENSE $4,368 $4,520 $4,677 $4,806 $4,938 $5,073 $5,213 $5,356 $5,503 $5,655 $5,810 SAFETY SHOES - MOU ITEM $2,583 $2,673 $2,766 $2,842 $2,920 $3,000 $3,083 $3,167 $3,254 $3,344 $3,436 ADVERTISING EXPENSE $2,250 $2,328 $2,409 $2,475 $2,543 $2,613 $2,685 $2,759 $2,835 $2,913 $2,993 WIRELESS COMMUNICATION $10,937 $11,317 $11,711 $12,032 $12,363 $12,703 $13,052 $13,411 $13,780 $14,159 $14,548 PHONES, FAX, ISDN LINES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 POSTAGE & SHIPPING $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OFFICE SUPPLIES $1,000 $1,035 $1,071 $1,100 $1,130 $1,161 $1,193 $1,226 $1,260 $1,295 $1,330 FIRST AID KIT SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROGRAM EXPENDITURES $5,000 $5,174 $5,354 $5,501 $5,652 $5,807 $5,967 $6,131 $6,300 $6,473 $6,651 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $100 $103 $107 $110 $113 $116 $119 $123 $126 $129 $133 WATER UTILITY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 DIESEL FUEL $500 $518 $536 $556 $575 $596 $617 $639 $662 $686 $711 MOTOR POOL RENTAL - OPS & MTCE $83,448 $86,433 $89,524 $92,726 $96,043 $99,478 $103,036 $106,722 $110,539 $114,493 $118,588 RETAINED VEHICLE EXPENSE $2,076 $2,150 $2,227 $2,307 $2,389 $2,475 $2,563 $2,655 $2,750 $2,848 $2,950 DIRECT VEHICLE EXPENSE $750 $777 $805 $833 $863 $894 $926 $959 $993 $1,029 $1,066 OTHER EQUIPMENT RENTAL $1,178 $1,219 $1,261 $1,296 $1,331 $1,368 $1,405 $1,444 $1,484 $1,525 $1,566 MTCE & REPAIR - EQUIP & FAC $590,151 $610,665 $631,891 $649,262 $667,110 $685,449 $704,292 $723,653 $743,546 $763,986 $784,988 SCADA MAINTENANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
VANDALISM $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROF. & CONT. SVCS $81,392 $84,221 $87,148 $89,544 $92,006 $94,535 $97,134 $99,804 $102,547 $105,366 $108,263 REFUSE DISPOSAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CONFERENCE, TRAINING & TRAVEL $7,500 $7,761 $8,030 $8,251 $8,478 $8,711 $8,951 $9,197 $9,449 $9,709 $9,976 JOB REQ CERTIFICATES & LICENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PREVENTION & MAINTENANCE MATLS $600,000 $620,856 $642,437 $660,098 $678,244 $696,889 $716,046 $735,730 $755,955 $776,737 $798,089 MACHINERY, EQUIPMENT, & FIXTUR $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES $325,464 $351,501 $379,621 $409,991 $426,391 $443,446 $461,184 $479,632 $498,817 $518,770 $539,520 SP COMP-BILINGUAL $4,504 $4,864 $5,253 $5,674 $5,901 $6,137 $6,382 $6,637 $6,903 $7,179 $7,466 OVERTIME $10,338 $11,165 $12,058 $13,023 $13,544 $14,086 $14,649 $15,235 $15,844 $16,478 $17,137 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DEFERRED COMPENSATION MATCH $495 $535 $577 $624 $648 $674 $701 $729 $759 $789 $821 TIERED EMP DEF COMPENSATION $594 $642 $693 $748 $778 $809 $842 $875 $910 $947 $985 TIERED RHS BENEFIT $198 $214 $231 $249 $259 $270 $281 $292 $303 $316 $328 LONGEVITY $693 $748 $808 $873 $908 $944 $982 $1,021 $1,062 $1,105 $1,149 PERS-NORMAL $38,669 $39,906 $41,183 $42,501 $43,861 $45,265 $46,713 $48,208 $49,751 $51,343 $52,986 MEDICARE $10,532 $10,869 $11,217 $11,576 $11,946 $12,328 $12,723 $13,130 $13,550 $13,984 $14,431 SHORT TERM DISABILITY $1,041 $1,075 $1,109 $1,144 $1,181 $1,219 $1,258 $1,298 $1,340 $1,382 $1,427 LONG TERM DISABILITY $2,213 $2,283 $2,356 $2,432 $2,510 $2,590 $2,673 $2,758 $2,847 $2,938 $3,032 WORKERS COMP $6,718 $6,933 $7,155 $7,384 $7,620 $7,864 $8,116 $8,375 $8,643 $8,920 $9,205 STATE UNEMPLOYMENT INSURANCE $321 $331 $343 $354 $366 $379 $392 $405 $419 $433 $448 HEALTH INSURANCE $57,995 $59,967 $62,006 $64,114 $66,294 $68,548 $70,878 $73,288 $75,780 $78,357 $81,021 OPT OUT HEALTH INSURANCE $14,256 $14,741 $15,242 $15,760 $16,296 $16,850 $17,423 $18,015 $18,628 $19,261 $19,916 LIFE INSURANCE $2,702 $2,794 $2,889 $2,987 $3,089 $3,194 $3,302 $3,414 $3,530 $3,650 $3,775 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$33,594 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $3,349 $3,617 $3,906 $4,218 $4,387 $4,563 $4,745 $4,935 $5,132 $5,338 $5,551 MINOR EQUIPMENT & FURNITURE $1,100 $1,138 $1,178 $1,210 $1,243 $1,278 $1,313 $1,349 $1,386 $1,424 $1,463 CONSTRUCTION MATERIALS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY MATERIALS/CONSTRUCTION $1,000 $1,059 $1,120 $1,186 $1,255 $1,305 $1,357 $1,411 $1,467 $1,525 $1,585 COMPUTER EQUIPMENT & SOFTWARE $2,423 $2,507 $2,594 $2,666 $2,739 $2,814 $2,892 $2,971 $3,053 $3,137 $3,223 UNIFORM EXPENSE $2,312 $2,392 $2,476 $2,544 $2,613 $2,685 $2,759 $2,835 $2,913 $2,993 $3,075 SAFETY SHOES - MOU ITEM $1,485 $1,537 $1,590 $1,634 $1,679 $1,725 $1,772 $1,821 $1,871 $1,922 $1,975 ADVERTISING EXPENSE $1,800 $1,863 $1,927 $1,980 $2,035 $2,091 $2,148 $2,207 $2,268 $2,330 $2,394 PROMOTIONAL/PUBLIC OUTREACH $21,388 $22,131 $22,901 $23,530 $24,177 $24,842 $25,525 $26,226 $26,947 $27,688 $28,449 WIRELESS COMMUNICATION $2,700 $2,794 $2,891 $2,970 $3,052 $3,136 $3,222 $3,311 $3,402 $3,495 $3,591 POSTAGE & SHIPPING $7,250 $7,502 $7,763 $7,976 $8,195 $8,421 $8,652 $8,890 $9,134 $9,386 $9,644 OFFICE SUPPLIES $600 $621 $642 $660 $678 $697 $716 $736 $756 $777 $798 PROGRAM EXPENDITURES $3,143 $3,252 $3,365 $3,458 $3,553 $3,651 $3,751 $3,854 $3,960 $4,069 $4,181 RECYCLED CONTENT PRODUCTS $60 $62 $64 $66 $68 $70 $72 $74 $76 $78 $80 MOTOR POOL RENTAL - OPS & MTCE $12,063 $12,494 $12,941 $13,404 $13,884 $14,380 $14,895 $15,427 $15,979 $16,551 $17,143 OTHER EQUIPMENT RENTAL $2,341 $2,422 $2,507 $2,575 $2,646 $2,719 $2,794 $2,871 $2,949 $3,031 $3,114 MILEAGE/VEHICLE EXP REIMB $150 $155 $161 $167 $173 $179 $185 $192 $199 $206 $213 REBATE PROGRAMS $25,000 $25,869 $26,768 $27,504 $28,260 $29,037 $29,835 $30,655 $31,498 $32,364 $33,254

129 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Debt Service - Water
PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MEMBERSHIP & DUES $2,712 $2,806 $2,904 $2,984 $3,066 $3,150 $3,237 $3,326 $3,417 $3,511 $3,607 CONFERENCE, TRAINING & TRAVEL $4,500 $4,656 $4,818 $4,951 $5,087 $5,227 $5,370 $5,518 $5,670 $5,826 $5,986 SCHOOL PROGRAMS $29,480 $30,505 $31,565 $32,433 $33,324 $34,240 $35,182 $36,149 $37,143 $38,164 $39,213 PERMANENT EMPLOYEES $542,194 $585,570 $632,415 $683,008 $710,329 $738,742 $768,291 $799,023 $830,984 $864,223 $898,792 SP COMP-BILINGUAL $3,411 $3,684 $3,979 $4,297 $4,469 $4,648 $4,833 $5,027 $5,228 $5,437 $5,654 TEMPORARY EMPLOYEES $41,284 $44,587 $48,154 $52,006 $54,086 $56,250 $58,500 $60,840 $63,273 $65,804 $68,436 OVERTIME $21,762 $23,503 $25,383 $27,414 $28,510 $29,651 $30,837 $32,070 $33,353 $34,687 $36,075 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DEFERRED COMPENSATION MATCH $1,700 $1,836 $1,983 $2,142 $2,227 $2,316 $2,409 $2,505 $2,605 $2,710 $2,818 PST DEFERRED COMPENSATION $301 $325 $351 $379 $394 $410 $427 $444 $461 $480 $499 TIERED EMP DEF COMPENSATION $1,200 $1,296 $1,400 $1,512 $1,572 $1,635 $1,700 $1,768 $1,839 $1,913 $1,989 TIERED RHS BENEFIT $600 $619 $639 $659 $681 $702 $725 $748 $772 $797 $822 LONGEVITY $1,750 $1,806 $1,864 $1,923 $1,985 $2,049 $2,114 $2,182 $2,252 $2,324 $2,398 ANNUAL LEAVE BUYBACK $4,420 $4,561 $4,707 $4,858 $5,014 $5,174 $5,339 $5,510 $5,687 $5,869 $6,056 PERS-NORMAL $67,925 $70,099 $72,342 $74,657 $77,046 $79,512 $82,056 $84,682 $87,392 $90,188 $93,074 MEDICARE $17,944 $18,518 $19,111 $19,722 $20,353 $21,005 $21,677 $22,370 $23,086 $23,825 $24,587 SHORT TERM DISABILITY $1,731 $1,786 $1,844 $1,903 $1,963 $2,026 $2,091 $2,158 $2,227 $2,298 $2,372 LONG TERM DISABILITY $3,683 $3,801 $3,922 $4,048 $4,178 $4,311 $4,449 $4,592 $4,738 $4,890 $5,047 WORKERS COMP $11,916 $12,297 $12,691 $13,097 $13,516 $13,948 $14,395 $14,855 $15,331 $15,821 $16,328 STATE UNEMPLOYMENT INSURANCE $571 $590 $610 $631 $652 $675 $698 $721 $746 $771 $797 HEALTH INSURANCE $164,133 $169,714 $175,484 $181,450 $187,620 $193,999 $200,595 $207,415 $214,467 $221,759 $229,299 OPT OUT HEALTH INSURANCE $10,800 $11,167 $11,547 $11,939 $12,345 $12,765 $13,199 $13,648 $14,112 $14,592 $15,088 LIFE INSURANCE $4,509 $4,662 $4,821 $4,985 $5,154 $5,329 $5,511 $5,698 $5,892 $6,092 $6,299 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$94,446 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $19,158 $20,691 $22,346 $24,134 $25,099 $26,103 $27,147 $28,233 $29,362 $30,537 $31,758 MINOR EQUIPMENT & FURNITURE $3,497 $3,619 $3,744 $3,847 $3,953 $4,062 $4,173 $4,288 $4,406 $4,527 $4,652 CONSTRUCTION MATERIALS $24,493 $25,926 $27,443 $29,049 $30,748 $31,968 $33,236 $34,555 $35,926 $37,351 $38,832 SAFETY MATERIALS/CONSTRUCTION $500 $529 $560 $593 $628 $653 $678 $705 $733 $762 $793 COMPUTER EQUIPMENT & SOFTWARE $2,509 $2,596 $2,686 $2,760 $2,836 $2,914 $2,994 $3,077 $3,161 $3,248 $3,337 UNIFORM EXPENSE $554 $573 $593 $609 $626 $643 $661 $679 $698 $717 $737 SAFETY SHOES - MOU ITEM $1,463 $1,514 $1,566 $1,610 $1,654 $1,699 $1,746 $1,794 $1,843 $1,894 $1,946 ADVERTISING EXPENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROMOTIONAL/PUBLIC OUTREACH $3,535 $3,658 $3,785 $3,889 $3,996 $4,106 $4,219 $4,335 $4,454 $4,576 $4,702 WIRELESS COMMUNICATION $4,040 $4,180 $4,326 $4,445 $4,567 $4,692 $4,821 $4,954 $5,090 $5,230 $5,374 POSTAGE & SHIPPING $129,041 $133,526 $138,168 $141,966 $145,869 $149,879 $153,999 $158,232 $162,582 $167,051 $171,644 OFFICE SUPPLIES $4,561 $4,720 $4,884 $5,018 $5,156 $5,298 $5,443 $5,593 $5,747 $5,904 $6,067 PROGRAM EXPENDITURES $5,529 $5,721 $5,920 $6,083 $6,250 $6,422 $6,598 $6,780 $6,966 $7,158 $7,354 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $300 $310 $321 $330 $339 $348 $358 $368 $378 $388 $399 MOTOR POOL RENTAL - OPS & MTCE $28,684 $29,710 $30,773 $31,873 $33,013 $34,194 $35,417 $36,684 $37,996 $39,355 $40,763 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $1,083,042 $1,120,689 $1,159,644 $1,191,522 $1,224,277 $1,257,933 $1,292,513 $1,328,044 $1,364,552 $1,402,064 $1,440,607 CUST CREDIT CRD PROCESSING FEE $390,347 $403,915 $417,956 $429,445 $441,251 $453,381 $465,844 $478,650 $491,808 $505,328 $519,219 CONFERENCE, TRAINING & TRAVEL $4,590 $4,750 $4,915 $5,050 $5,189 $5,331 $5,478 $5,628 $5,783 $5,942 $6,105 JOB REQ CERTIFICATES & LICENSE $479 $496 $513 $527 $541 $556 $572 $587 $604 $620 $637 PERMANENT EMPLOYEES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
TEMPORARY EMPLOYEES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OVERTIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
AUTO ALLOWANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DEFERRED COMPENSATION MATCH $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED RHS BENEFIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
LONGEVITY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
ANNUAL LEAVE BUYBACK $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
ANNUAL LEAVE OVER MAX $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERS-NORMAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MEDICARE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SHORT TERM DISABILITY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
LONG TERM DISABILITY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WORKERS COMP $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 STATE UNEMPLOYMENT INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OPT OUT HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LIFE INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY SHOES - MOU ITEM $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 POSTAGE & SHIPPING $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
Description Category Utility Included in DSCR FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Water Debt Service (Lease) Principal Water No $36,000 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 Water Debt Service (Lease) Interest Water No $2,162,327 $2,157,591 $2,036,080 $1,920,628 $1,815,238 $1,710,533 $1,608,715 $1,516,667 $1,431,613 $1,351,180 $1,272,951 Water Debt Service Principal Water Yes $2,549,736 $2,569,292 $2,700,067 $2,817,926 $2,946,626 $2,991,499 $3,130,925 $3,278,978 $3,437,074 $3,600,726 $2,617,394 Water Debt Service Interest Water Yes $849,178 $909,815 $842,864 $769,390 $687,640 $599,171 $505,438 $403,982 $295,916 $180,820 $86,640 Total Issued Year Issued Utility FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 FY 2035 $50,000,000 FY 2026 $50,500,000
Interest Rate 5.0%
Bond Term 30 $50,500,000 $49,747,428 $48,982,228 $48,178,768 $47,335,134 $46,449,319 $45,519,213 $44,542,602 $43,517,161 Issuance Expense $500,000
Principal $752,572 $765,200 $803,460 $843,633 $885,815 $930,106 $976,611 $1,025,442 $1,076,714 Interest $2,500,000 $2,487,371 $2,449,111 $2,408,938 $2,366,757 $2,322,466 $2,275,961 $2,227,130 $2,175,858

130 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Fixed Revenue/Growth Projections – Reclaimed Water
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Residential $31,520 $31,520 $31,520 $31,520 $31,520 $31,520 $31,520 $31,520 $31,520 $31,520 5/8"
3/4" 1 1 1 1 1 1 1 1 1 1
1" - - - - - - - - - -
1 1/2" 1 1 1 1 1 1 1 1 1 1
2" 3 3 3 3 3 3 3 3 3 3
3" 1 1 1 1 1 1 1 1 1 1
4" 4 4 4 4 4 4 4 4 4 4
6"
8"
10"
Commercial $173,669 $173,669 $173,669 $173,669 $173,669 $173,669 $173,669 $173,669 $173,669 $173,669 5/8"
3/4" 4 4 4 4 4 4 4 4 4 4
1" 32 32 32 32 32 32 32 32 32 32
1 1/2" 38 38 38 38 38 38 38 38 38 38
2" 55 55 55 55 55 55 55 55 55 55
3" 2 2 2 2 2 2 2 2 2 2
4" - - - - - - - - - -
6" 2 2 2 2 2 2 2 2 2 2
8"
10"
Governmental $403,231 $404,213 $405,195 $406,177 $407,159 $408,141 $409,123 $410,105 $411,087 $412,069 5/8"
3/4" 11 11 11 11 11 11 11 11 11 11
1" 49 49 49 49 49 49 49 49 49 49
1 1/2" 130 131 132 133 134 135 136 137 138 139
2" 28 28 28 28 28 28 28 28 28 28
3" 9 9 9 9 9 9 9 9 9 9
4" 10 10 10 10 10 10 10 10 10 10
6" 4 4 4 4 4 4 4 4 4 4
8" 1 1 1 1 1 1 1 1 1 1
10" 1 1 1 1 1 1 1 1 1 1
Industrial $1,507 $1,507 $1,507 $1,507 $1,507 $1,507 $1,507 $1,507 $1,507 $1,507 5/8"
3/4"
1"
1 1/2"
2" 1 1 1 1 1 1 1 1 1 1
3"
4"
6"
8"
10"

131 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Variable Revenue/Use Projections – Reclaimed Water
Other Revenues - Reclaimed Water
Operating Expenses - Reclaimed Water
FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Residential $66,184 $66,184 $66,184 $66,184 $66,184 $66,184 $66,184 $66,184 $66,184 $66,184 Width 1 30,154 30,154 30,154 30,154 30,154 30,154 30,154 30,154 30,154 30,154 Width 2 391 391 391 391 391 391 391 391 391 391
Width 3 76 76 76 76 76 76 76 76 76 76
Width 4 12 12 12 12 12 12 12 12 12 12
Width 5
Width 6
Commercial $1,126,608 $1,126,608 $1,126,608 $1,126,608 $1,126,608 $1,126,608 $1,126,608 $1,126,608 $1,126,608 $1,126,608 Width 1 386,071 386,071 386,071 386,071 386,071 386,071 386,071 386,071 386,071 386,071 Width 2 28,526 28,526 28,526 28,526 28,526 28,526 28,526 28,526 28,526 28,526 Width 3 13,238 13,238 13,238 13,238 13,238 13,238 13,238 13,238 13,238 13,238 Width 4 23,763 23,763 23,763 23,763 23,763 23,763 23,763 23,763 23,763 23,763 Width 5
Width 6
Governmental $2,561,667 $2,572,476 $2,583,284 $2,594,093 $2,604,902 $2,615,710 $2,626,519 $2,637,328 $2,648,137 $2,658,945 Width 1 1,008,427 1,012,681 1,016,936 1,021,191 1,025,446 1,029,701 1,033,956 1,038,211 1,042,466 1,046,721 Width 2 68,925 69,216 69,507 69,797 70,088 70,379 70,670 70,961 71,252 71,542 Width 3 17,156 17,228 17,300 17,373 17,445 17,518 17,590 17,662 17,735 17,807 Width 4 17,025 17,097 17,169 17,241 17,312 17,384 17,456 17,528 17,600 17,672 Width 5
Width 6
Industrial $320 $320 $320 $320 $320 $320 $320 $320 $320 $320 Width 1 149 149 149 149 149 149 149 149 149 149
Width 2 - - - - - - - - - -
Width 3 - - - - - - - - - -
Width 4 - - - - - - - - - -
Width 5
Width 6
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Other Operating Revenue $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 $904,672 PENALTIES $19,300 $19,300 $19,300 $19,300 $19,300 $19,300 $19,300 $19,300 $19,300 $19,300 $19,300 DAMAGE RECOVERY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
WHOLESALE WATER SALES $883,872 $883,872 $883,872 $883,872 $883,872 $883,872 $883,872 $883,872 $883,872 $883,872 $883,872 PERMITS AND FEES $1,000 $1,000 $1,000 $1,000 $1,000 $1,000 $1,000 $1,000 $1,000 $1,000 $1,000 SERVICE INSTALLATION $500 $500 $500 $500 $500 $500 $500 $500 $500 $500 $500 METER FEES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
Non-Operating Revenue $31,016 $31,618 $32,233 $32,859 $33,499 $34,151 $34,816 $35,494 $36,186 $36,892 $37,612 INTEREST ON INVESTMENTS $30,118.00 $30,720 $31,335 $31,961 $32,601 $33,253 $33,918 $34,596 $35,288 $35,994 $36,714 GASB31 GAIN/LOSS ON INVESTMENT $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 GAIN OR LOSS INVESTMENT SALE $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 UTILITY LOCATING & MARKING $498.00 $498 $498 $498 $498 $498 $498 $498 $498 $498 $498 UTILITY BILLING SVCS REIMB $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SERVICES TO OTHER FUNDS $400.00 $400 $400 $400 $400 $400 $400 $400 $400 $400 $400 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Total Operating Expense $2,062,141 $2,148,286 $2,231,273 $2,309,565 $2,384,807 $2,460,063 $2,537,739 $2,617,917 $2,700,678 $2,786,106 $2,874,290 PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERMANENT EMPLOYEES $31,965 $34,522 $37,284 $40,267 $41,877 $43,552 $45,295 $47,106 $48,991 $50,950 $52,988 FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $271 $293 $316 $341 $355 $369 $384 $399 $415 $432 $449 DEFERRED COMPENSATION MATCH $114 $123 $133 $144 $149 $155 $162 $168 $175 $182 $189 TIERED EMP DEF COMPENSATION $36 $39 $42 $45 $47 $49 $51 $53 $55 $57 $60 TIERED RHS BENEFIT $36 $37 $38 $40 $41 $42 $43 $45 $46 $48 $49 LONGEVITY $96 $99 $102 $106 $109 $112 $116 $120 $124 $127 $132 ANNUAL LEAVE BUYBACK $574 $592 $611 $631 $651 $672 $693 $716 $738 $762 $787 PERS-NORMAL $3,889 $4,013 $4,142 $4,274 $4,411 $4,552 $4,698 $4,848 $5,004 $5,164 $5,329 MEDICARE $981 $1,012 $1,045 $1,078 $1,113 $1,148 $1,185 $1,223 $1,262 $1,303 $1,344 SHORT TERM DISABILITY $101 $104 $108 $111 $115 $118 $122 $126 $130 $134 $138 LONG TERM DISABILITY $218 $225 $232 $240 $247 $255 $263 $272 $280 $289 $299 WORKERS COMP $645 $666 $687 $709 $732 $755 $779 $804 $830 $856 $884 STATE UNEMPLOYMENT INSURANCE $29 $30 $31 $32 $33 $34 $35 $37 $38 $39 $41 HEALTH INSURANCE $8,131 $8,407 $8,693 $8,989 $9,295 $9,611 $9,937 $10,275 $10,624 $10,986 $11,359 OPT OUT HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LIFE INSURANCE $266 $275 $284 $294 $304 $314 $325 $336 $348 $359 $372 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$936 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
COMPUTER EQUIPMENT & SOFTWARE $1,254 $1,298 $1,343 $1,380 $1,418 $1,456 $1,497 $1,538 $1,580 $1,623 $1,668 SAFETY SHOES - MOU ITEM $99 $102 $106 $109 $112 $115 $118 $121 $125 $128 $132 OFFICE SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROGRAM EXPENDITURES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROF. & CONT. SVCS $792 $820 $848 $871 $895 $920 $945 $971 $998 $1,025 $1,053

132 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study PERMANENT EMPLOYEES $11,794 $12,738 $13,757 $14,857 $15,451 $16,069 $16,712 $17,381 $18,076 $18,799 $19,551 SP COMP-BILINGUAL $81 $87 $94 $102 $106 $110 $115 $119 $124 $129 $134 TEMPORARY EMPLOYEES $167 $180 $195 $210 $219 $228 $237 $246 $256 $266 $277 OVERTIME $160 $173 $187 $202 $210 $218 $227 $236 $245 $255 $265 AUTO ALLOWANCE $58 $60 $62 $64 $67 $69 $72 $74 $77 $80 $82 DEFERRED COMPENSATION MATCH $95 $103 $111 $120 $124 $129 $135 $140 $146 $151 $157 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $24 $26 $28 $30 $31 $33 $34 $35 $37 $38 $40 TIERED RHS BENEFIT $24 $25 $26 $26 $27 $28 $29 $30 $31 $32 $33 LONGEVITY $153 $158 $163 $168 $174 $179 $185 $191 $197 $203 $210 ANNUAL LEAVE BUYBACK $313 $323 $333 $344 $355 $366 $378 $390 $403 $416 $429 PERS-NORMAL $1,468 $1,515 $1,563 $1,613 $1,665 $1,718 $1,773 $1,830 $1,889 $1,949 $2,012 MEDICARE $371 $383 $395 $408 $421 $434 $448 $463 $477 $493 $508 SHORT TERM DISABILITY $38 $39 $40 $42 $43 $44 $46 $47 $49 $50 $52 LONG TERM DISABILITY $81 $84 $86 $89 $92 $95 $98 $101 $104 $108 $111 WORKERS COMP $243 $251 $259 $267 $276 $284 $294 $303 $313 $323 $333 STATE UNEMPLOYMENT INSURANCE $11 $11 $12 $12 $13 $13 $13 $14 $14 $15 $15 HEALTH INSURANCE $2,679 $2,770 $2,864 $2,962 $3,062 $3,166 $3,274 $3,385 $3,501 $3,620 $3,743 RETIREES HEALTH INSURANCE/OPEB $11,149 $11,528 $11,920 $12,325 $12,744 $13,178 $13,626 $14,089 $14,568 $15,063 $15,575 OPT OUT HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LIFE INSURANCE $99 $102 $106 $109 $113 $117 $121 $125 $129 $134 $138 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY MATERIALS/CONSTRUCTION $5 $5 $6 $6 $6 $7 $7 $7 $7 $8 $8 COMPUTER EQUIPMENT & SOFTWARE $29 $30 $31 $32 $33 $34 $35 $36 $37 $38 $39 SAFETY SHOES - MOU ITEM $3 $3 $3 $3 $3 $3 $4 $4 $4 $4 $4 ADVERTISING EXPENSE $14 $14 $15 $15 $16 $16 $17 $17 $18 $18 $19 POSTAGE & SHIPPING $250 $259 $268 $275 $283 $290 $298 $307 $315 $324 $333 OFFICE SUPPLIES $120 $124 $128 $132 $136 $139 $143 $147 $151 $155 $160 PROGRAM EXPENDITURES $207 $214 $222 $228 $234 $240 $247 $254 $261 $268 $275 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $12 $12 $13 $13 $14 $14 $14 $15 $15 $16 $16 RENTS & LEASES $17,679 $18,294 $18,929 $19,450 $19,984 $20,534 $21,098 $21,678 $22,274 $22,887 $23,516 MILEAGE/VEHICLE EXP REIMB $5 $5 $5 $6 $6 $6 $6 $6 $7 $7 $7 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $12,101 $12,522 $12,957 $13,313 $13,679 $14,055 $14,442 $14,839 $15,247 $15,666 $16,096 INSURANCE & SURETY BONDS $6,786 $7,022 $7,266 $7,466 $7,671 $7,882 $8,098 $8,321 $8,550 $8,785 $9,026 INSURANCE PREMIUMS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MEMBERSHIP & DUES $7,483 $7,743 $8,012 $8,233 $8,459 $8,691 $8,930 $9,176 $9,428 $9,687 $9,954 CONFERENCE, TRAINING & TRAVEL $240 $248 $257 $264 $271 $279 $286 $294 $302 $311 $319 BAD DEBTS EXPENSE $880 $911 $942 $968 $995 $1,022 $1,050 $1,079 $1,109 $1,139 $1,171 ADMINISTRATIVE SERVICES CHARGE $89,852 $92,975 $96,207 $98,852 $101,569 $104,361 $107,230 $110,178 $113,207 $116,319 $119,516 INTERNAL SVC CHRG-WAREHOUSE $1,849 $1,913 $1,980 $2,034 $2,090 $2,148 $2,207 $2,267 $2,330 $2,394 $2,459 INTERNAL SVC CHRG-INFO TECH $47,607 $49,262 $50,974 $52,375 $53,815 $55,295 $56,815 $58,377 $59,981 $61,630 $63,324 PERMANENT EMPLOYEES $2,422 $2,616 $2,825 $3,051 $3,173 $3,300 $3,432 $3,569 $3,712 $3,861 $4,015 OVERTIME $17 $18 $20 $21 $22 $23 $24 $25 $26 $27 $28
DEFERRED COMPENSATION MATCH $5 $5 $6 $6 $7 $7 $7 $7 $8 $8 $8 TIERED EMP DEF COMPENSATION $6 $6 $7 $8 $8 $8 $9 $9 $9 $10 $10 TIERED RHS BENEFIT $2 $2 $2 $2 $2 $2 $2 $2 $3 $3 $3
LONGEVITY $10 $10 $11 $11 $11 $12 $12 $12 $13 $13 $14
PERS-NORMAL $292 $301 $311 $321 $331 $342 $353 $364 $376 $388 $400 MEDICARE $73 $75 $78 $80 $83 $85 $88 $91 $94 $97 $100
SHORT TERM DISABILITY $8 $8 $9 $9 $9 $9 $10 $10 $10 $11 $11 LONG TERM DISABILITY $16 $17 $17 $18 $18 $19 $19 $20 $21 $21 $22 WORKERS COMP $49 $51 $52 $54 $56 $57 $59 $61 $63 $65 $67 STATE UNEMPLOYMENT INSURANCE $3 $3 $3 $3 $3 $4 $4 $4 $4 $4 $4 HEALTH INSURANCE $186 $192 $199 $206 $213 $220 $227 $235 $243 $251 $260 OPT OUT HEALTH INSURANCE $72 $74 $77 $80 $82 $85 $88 $91 $94 $97 $101 LIFE INSURANCE $20 $21 $21 $22 $23 $24 $24 $25 $26 $27 $28 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY SHOES - MOU ITEM $9 $9 $10 $10 $10 $10 $11 $11 $11 $12 $12 POSTAGE & SHIPPING $120 $124 $128 $132 $136 $139 $143 $147 $151 $155 $160 OFFICE SUPPLIES $75 $78 $80 $83 $85 $87 $90 $92 $94 $97 $100 RECYCLED CONTENT PRODUCTS $8 $8 $9 $9 $9 $9 $10 $10 $10 $10 $11 MOTOR POOL RENTAL - OPS & MTCE $465 $482 $499 $517 $535 $554 $574 $595 $616 $638 $661 PROF. & CONT. SVCS $391,221 $404,820 $418,891 $430,407 $442,239 $454,396 $466,887 $479,722 $492,909 $506,459 $520,382 REGULATORY PERMIT & USE FEES $55 $57 $59 $61 $62 $64 $66 $67 $69 $71 $73 PERMANENT EMPLOYEES $22,146 $23,918 $25,831 $27,898 $29,014 $30,174 $31,381 $32,637 $33,942 $35,300 $36,712 SHIFT DIFFERENTIAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $108 $117 $126 $136 $141 $147 $153 $159 $166 $172 $179 SP COMP-GRADE 4 CERT PAY $360 $389 $420 $453 $472 $491 $510 $531 $552 $574 $597 SP COMP-GRADE 5 CERT PAY $352 $380 $411 $443 $461 $480 $499 $519 $539 $561 $584 OVERTIME $2,717 $2,934 $3,169 $3,423 $3,560 $3,702 $3,850 $4,004 $4,164 $4,331 $4,504 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $136 $147 $159 $171 $178 $185 $193 $200 $208 $217 $225 DEFERRED COMPENSATION MATCH $96 $104 $112 $121 $126 $131 $136 $141 $147 $153 $159 TIERED EMP DEF COMPENSATION $48 $52 $56 $60 $63 $65 $68 $71 $74 $77 $80 TIERED RHS BENEFIT $32 $33 $34 $35 $36 $37 $39 $40 $41 $42 $44 LONGEVITY $95 $98 $101 $104 $108 $111 $115 $118 $122 $126 $130 ANNUAL LEAVE BUYBACK $240 $248 $256 $264 $272 $281 $290 $299 $309 $319 $329 PERS-NORMAL $2,696 $2,783 $2,872 $2,964 $3,059 $3,156 $3,257 $3,362 $3,469 $3,580 $3,695 MEDICARE $778 $802 $828 $855 $882 $910 $939 $969 $1,000 $1,032 $1,065 SHORT TERM DISABILITY $70 $73 $75 $77 $80 $82 $85 $88 $91 $93 $96 LONG TERM DISABILITY $152 $157 $162 $167 $172 $178 $183 $189 $195 $202 $208 WORKERS COMP $467 $482 $498 $514 $530 $547 $565 $583 $601 $621 $641 STATE UNEMPLOYMENT INSURANCE $25 $26 $27 $28 $29 $30 $31 $32 $33 $34 $35

133 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study HEALTH INSURANCE $4,374 $4,523 $4,676 $4,835 $5,000 $5,170 $5,346 $5,527 $5,715 $5,910 $6,111 OPT OUT HEALTH INSURANCE $216 $223 $231 $239 $247 $255 $264 $273 $282 $292 $302 LIFE INSURANCE $183 $189 $196 $202 $209 $216 $224 $231 $239 $247 $256 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 BUDGETARY/PAYROLL ADJUSTMENTS $1,180 $1,274 $1,376 $1,486 $1,546 $1,608 $1,672 $1,739 $1,808 $1,881 $1,956 COMPUTER EQUIPMENT & SOFTWARE $2,007 $2,077 $2,149 $2,208 $2,269 $2,331 $2,395 $2,461 $2,529 $2,598 $2,670 SAFETY SHOES - MOU ITEM $69 $71 $74 $76 $78 $80 $82 $85 $87 $89 $92 ADVERTISING EXPENSE $450 $466 $482 $495 $509 $523 $537 $552 $567 $583 $599 ELECTRIC UTILITY $712,551 $736,971 $762,228 $788,350 $815,367 $843,311 $872,212 $902,104 $933,020 $964,995 $998,066 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SCADA MAINTENANCE $104,777 $108,419 $112,188 $115,272 $118,441 $121,696 $125,042 $128,479 $132,011 $135,640 $139,369 MOWING/LANDSCAPE CONTRACTS $6,259 $6,477 $6,702 $6,886 $7,075 $7,270 $7,470 $7,675 $7,886 $8,103 $8,325 PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PREVENTION & MAINTENANCE MATLS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES $11,481 $12,399 $13,391 $14,463 $15,041 $15,643 $16,269 $16,919 $17,596 $18,300 $19,032 SPECIAL ASSIGNMENT PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $150 $162 $175 $189 $197 $204 $213 $221 $230 $239 $249 SP COMP-GRADE 4 CERT PAY $120 $130 $140 $151 $157 $164 $170 $177 $184 $191 $199 SP COMP-GRADE 5 CERT PAY $299 $323 $349 $377 $392 $407 $424 $441 $458 $477 $496 OVERTIME $2,823 $3,049 $3,293 $3,556 $3,698 $3,846 $4,000 $4,160 $4,327 $4,500 $4,680 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $136 $147 $159 $171 $178 $185 $193 $200 $208 $217 $225 DEFERRED COMPENSATION MATCH $64 $69 $75 $81 $84 $87 $91 $94 $98 $102 $106 TIERED EMP DEF COMPENSATION $60 $65 $70 $76 $79 $82 $85 $88 $92 $96 $99 TIERED RHS BENEFIT $24 $25 $26 $26 $27 $28 $29 $30 $31 $32 $33 LONGEVITY $73 $75 $78 $80 $83 $85 $88 $91 $94 $97 $100
ANNUAL LEAVE BUYBACK $186 $192 $198 $204 $211 $218 $225 $232 $239 $247 $255 PERS-NORMAL $1,462 $1,509 $1,557 $1,607 $1,658 $1,711 $1,766 $1,823 $1,881 $1,941 $2,003 MEDICARE $458 $473 $488 $503 $519 $536 $553 $571 $589 $608 $628 SHORT TERM DISABILITY $38 $39 $40 $42 $43 $44 $46 $47 $49 $50 $52 LONG TERM DISABILITY $79 $82 $84 $87 $90 $92 $95 $98 $102 $105 $108 WORKERS COMP $247 $255 $263 $271 $280 $289 $298 $308 $318 $328 $338 STATE UNEMPLOYMENT INSURANCE $13 $13 $14 $14 $15 $15 $16 $16 $17 $18 $18 HEALTH INSURANCE $3,138 $3,245 $3,355 $3,469 $3,587 $3,709 $3,835 $3,965 $4,100 $4,240 $4,384 OPT OUT HEALTH INSURANCE $288 $298 $308 $318 $329 $340 $352 $364 $376 $389 $402 LIFE INSURANCE $96 $99 $103 $106 $110 $113 $117 $121 $125 $130 $134 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 MINOR EQUIPMENT & FURNITURE $430 $445 $460 $473 $486 $499 $513 $527 $542 $557 $572 CONSTRUCTION MATERIALS $58,200 $61,605 $65,210 $69,025 $73,064 $75,962 $78,976 $82,109 $85,366 $88,752 $92,273 SAFETY SHOES - MOU ITEM $279 $289 $299 $307 $315 $324 $333 $342 $352 $361 $371 PROGRAM EXPENDITURES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MILEAGE/VEHICLE EXP REIMB $45 $47 $48 $50 $52 $54 $56 $58 $60 $62 $64 PROF. & CONT. SVCS $27,957 $28,929 $29,934 $30,757 $31,603 $32,472 $33,364 $34,281 $35,224 $36,192 $37,187 PREVENTION & MAINTENANCE MATLS $41,100 $42,529 $44,007 $45,217 $46,460 $47,737 $49,049 $50,398 $51,783 $53,206 $54,669 PERMANENT EMPLOYEES $15,847 $17,115 $18,484 $19,963 $20,761 $21,592 $22,455 $23,353 $24,288 $25,259 $26,269 SP COMP-BILINGUAL $46 $50 $54 $58 $60 $63 $65 $68 $71 $73 $76 SP COMP-GRADE 4 CERT PAY $120 $130 $140 $151 $157 $164 $170 $177 $184 $191 $199 SP COMP-GRADE 5 CERT PAY $369 $399 $430 $465 $483 $503 $523 $544 $566 $588 $612 TEMPORARY EMPLOYEES $264 $285 $308 $333 $346 $360 $374 $389 $405 $421 $438 OVERTIME $1,064 $1,149 $1,241 $1,340 $1,394 $1,450 $1,508 $1,568 $1,631 $1,696 $1,764 SPECIAL DUTY PAY $204 $220 $238 $257 $267 $278 $289 $301 $313 $325 $338 DEFERRED COMPENSATION MATCH $44 $48 $51 $55 $58 $60 $62 $65 $67 $70 $73 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $36 $39 $42 $45 $47 $49 $51 $53 $55 $57 $60 TIERED RHS BENEFIT $16 $17 $17 $18 $18 $19 $19 $20 $21 $21 $22 LONGEVITY $50 $52 $53 $55 $57 $59 $60 $62 $64 $66 $69
ANNUAL LEAVE BUYBACK $174 $180 $185 $191 $197 $204 $210 $217 $224 $231 $238 PERS-NORMAL $2,010 $2,074 $2,141 $2,209 $2,280 $2,353 $2,428 $2,506 $2,586 $2,669 $2,754 MEDICARE $540 $557 $575 $594 $613 $632 $652 $673 $695 $717 $740 SHORT TERM DISABILITY $50 $52 $53 $55 $57 $59 $60 $62 $64 $66 $69 LONG TERM DISABILITY $107 $110 $114 $118 $121 $125 $129 $133 $138 $142 $147 WORKERS COMP $341 $352 $363 $375 $387 $399 $412 $425 $439 $453 $467 STATE UNEMPLOYMENT INSURANCE $18 $19 $19 $20 $21 $21 $22 $23 $24 $24 $25 HEALTH INSURANCE $3,198 $3,307 $3,419 $3,535 $3,656 $3,780 $3,908 $4,041 $4,179 $4,321 $4,468 OPT OUT HEALTH INSURANCE $312 $323 $334 $345 $357 $369 $381 $394 $408 $422 $436 LIFE INSURANCE $130 $134 $139 $144 $149 $154 $159 $164 $170 $176 $182 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$928 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $926 $1,000 $1,080 $1,166 $1,213 $1,262 $1,312 $1,365 $1,419 $1,476 $1,535 MINOR EQUIPMENT & FURNITURE $3,200 $3,311 $3,426 $3,521 $3,617 $3,717 $3,819 $3,924 $4,032 $4,143 $4,256 CONSTRUCTION MATERIALS $50,000 $52,926 $56,022 $59,300 $62,770 $65,260 $67,849 $70,540 $73,338 $76,248 $79,273 SAFETY SHOES - MOU ITEM $51 $53 $55 $56 $58 $59 $61 $63 $64 $66 $68 WIRELESS COMMUNICATION $770 $797 $824 $847 $870 $894 $919 $944 $970 $997 $1,024 DIESEL FUEL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MOTOR POOL RENTAL - OPS & MTCE $7,501 $7,769 $8,047 $8,335 $8,633 $8,942 $9,262 $9,593 $9,936 $10,292 $10,660 RETAINED VEHICLE EXPENSE $356 $369 $382 $396 $410 $424 $440 $455 $472 $488 $506 OTHER EQUIPMENT RENTAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 MTCE & REPAIR - EQUIP & FAC $158,000 $163,492 $169,175 $173,826 $178,604 $183,514 $188,559 $193,742 $199,068 $204,541 $210,163 PROF. & CONT. SVCS $5,555 $5,748 $5,948 $6,111 $6,279 $6,452 $6,629 $6,812 $6,999 $7,191 $7,389 PREVENTION & MAINTENANCE MATLS $113,847 $117,804 $121,899 $125,250 $128,693 $132,231 $135,866 $139,601 $143,439 $147,382 $151,433

134 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Capital Expenses – Reclaimed Water
MACHINERY, EQUIPMENT, & FIXTUR $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES $3,259 $3,520 $3,801 $4,105 $4,270 $4,440 $4,618 $4,803 $4,995 $5,195 $5,402 SP COMP-BILINGUAL $46 $50 $54 $58 $60 $63 $65 $68 $71 $73 $76 OVERTIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DEFERRED COMPENSATION MATCH $5 $5 $6 $6 $7 $7 $7 $7 $8 $8 $8 TIERED EMP DEF COMPENSATION $6 $6 $7 $8 $8 $8 $9 $9 $9 $10 $10 TIERED RHS BENEFIT $2 $2 $2 $2 $2 $2 $2 $2 $3 $3 $3
LONGEVITY $7 $7 $7 $8 $8 $8 $8 $9 $9 $9 $10
PERS-NORMAL $323 $333 $344 $355 $366 $378 $390 $403 $416 $429 $443 MEDICARE $101 $104 $108 $111 $115 $118 $122 $126 $130 $134 $138 SHORT TERM DISABILITY $11 $11 $12 $12 $12 $13 $13 $14 $14 $15 $15 LONG TERM DISABILITY $22 $23 $23 $24 $25 $26 $27 $27 $28 $29 $30 WORKERS COMP $67 $69 $71 $74 $76 $78 $81 $84 $86 $89 $92 STATE UNEMPLOYMENT INSURANCE $5 $5 $5 $6 $6 $6 $6 $6 $7 $7 $7 HEALTH INSURANCE $585 $605 $625 $647 $669 $691 $715 $739 $764 $790 $817 OPT OUT HEALTH INSURANCE $144 $149 $154 $159 $165 $170 $176 $182 $188 $195 $201 LIFE INSURANCE $27 $28 $29 $30 $31 $32 $33 $34 $35 $36 $38 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 BUDGETARY/PAYROLL ADJUSTMENTS $132 $143 $154 $166 $173 $180 $187 $195 $202 $210 $219 SAFETY SHOES - MOU ITEM $15 $16 $16 $17 $17 $17 $18 $18 $19 $19 $20 PERMANENT EMPLOYEES $9,883 $10,674 $11,528 $12,450 $12,948 $13,466 $14,004 $14,564 $15,147 $15,753 $16,383 SP COMP-BILINGUAL $69 $75 $80 $87 $90 $94 $98 $102 $106 $110 $114 TEMPORARY EMPLOYEES $826 $892 $963 $1,041 $1,082 $1,125 $1,170 $1,217 $1,266 $1,317 $1,369 OVERTIME $435 $470 $507 $548 $570 $593 $616 $641 $667 $693 $721 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DEFERRED COMPENSATION MATCH $34 $37 $40 $43 $45 $46 $48 $50 $52 $54 $56 PST DEFERRED COMPENSATION $6 $7 $7 $8 $8 $9 $9 $9 $10 $10 $11 TIERED EMP DEF COMPENSATION $24 $26 $28 $30 $31 $33 $34 $35 $37 $38 $40 TIERED RHS BENEFIT $12 $12 $13 $13 $14 $14 $14 $15 $15 $16 $16 LONGEVITY $35 $36 $37 $38 $40 $41 $42 $44 $45 $46 $48
ANNUAL LEAVE BUYBACK $89 $92 $95 $98 $101 $104 $108 $111 $115 $118 $122 PERS-NORMAL $1,243 $1,282 $1,323 $1,366 $1,409 $1,454 $1,501 $1,549 $1,599 $1,650 $1,703 MEDICARE $326 $337 $348 $359 $370 $382 $394 $407 $420 $433 $447 SHORT TERM DISABILITY $34 $35 $36 $37 $39 $40 $41 $42 $44 $45 $47 LONG TERM DISABILITY $69 $71 $73 $76 $78 $81 $83 $86 $89 $92 $95 WORKERS COMP $220 $227 $235 $242 $250 $258 $266 $275 $284 $293 $302 STATE UNEMPLOYMENT INSURANCE $10 $10 $11 $11 $12 $12 $12 $13 $13 $14 $14 HEALTH INSURANCE $2,865 $2,962 $3,063 $3,167 $3,275 $3,386 $3,501 $3,620 $3,744 $3,871 $4,002 OPT OUT HEALTH INSURANCE $216 $223 $231 $239 $247 $255 $264 $273 $282 $292 $302 LIFE INSURANCE $80 $83 $86 $88 $91 $95 $98 $101 $105 $108 $112 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$4,644 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $383 $414 $447 $483 $502 $522 $543 $565 $587 $611 $635 MINOR EQUIPMENT & FURNITURE $15 $16 $16 $17 $17 $17 $18 $18 $19 $19 $20 CONSTRUCTION MATERIALS $247 $261 $277 $293 $310 $322 $335 $348 $362 $377 $392 SAFETY MATERIALS/CONSTRUCTION $10 $11 $11 $12 $13 $13 $14 $14 $15 $15 $16 COMPUTER EQUIPMENT & SOFTWARE $37 $38 $40 $41 $42 $43 $44 $45 $47 $48 $49 UNIFORM EXPENSE $6 $6 $6 $7 $7 $7 $7 $7 $8 $8 $8
SAFETY SHOES - MOU ITEM $16 $17 $17 $18 $18 $19 $19 $20 $20 $21 $21 ADVERTISING EXPENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WIRELESS COMMUNICATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 POSTAGE & SHIPPING $394 $408 $422 $433 $445 $458 $470 $483 $496 $510 $524 OFFICE SUPPLIES $60 $62 $64 $66 $68 $70 $72 $74 $76 $78 $80 PROGRAM EXPENDITURES $94 $97 $101 $103 $106 $109 $112 $115 $118 $122 $125 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $6 $6 $6 $7 $7 $7 $7 $7 $8 $8 $8 MOTOR POOL RENTAL - OPS & MTCE $312 $323 $335 $347 $359 $372 $385 $399 $413 $428 $443 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $10,000 $10,348 $10,707 $11,002 $11,304 $11,615 $11,934 $12,262 $12,599 $12,946 $13,301 CONFERENCE, TRAINING & TRAVEL $92 $95 $99 $101 $104 $107 $110 $113 $116 $119 $122 JOB REQ CERTIFICATES & LICENSE $5 $5 $5 $6 $6 $6 $6 $6 $6 $6 $7 Project Type Funding Source FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 WATER RECLAMATION FACILITY 1 RECLAIMED HYDRO TANK COMPRESSORS Plant PAYGO $0 $100,000 $0 $0 $0 $0 $0 $0 $0 $0 $0 LINCOLN FOOTHILL RECLAIMED PIPELINE Distribution PAYGO $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WRCRWA NORTH PIPELINE CAPACITY PURCHASE Distribution PAYGO $0 $200,000 $2,200,000 $0 $0 $0 $0 $0 $0 $0 $0 RECLAIMED WATER MASTER PLAN General PAYGO $0 $0 $0 $150,000 $0 $0 $0 $0 $0 $0 $0 INJECTION WELL STUDY General PAYGO $0 $0 $60,000 $0 $0 $0 $0 $0 $0 $0 $0 AVENIDA DEL VISTA RECLAIMED PIPELINE Distribution PAYGO $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 ONTARIO AVENUE WIDENING AT LINCOLN AVENUE General PAYGO $900,000 $974,600 $0 $0 $0 $0 $0 $0 $0 $0 $0 WATER RECLAMATION FACILITY 1 RECLAIMED HYDRO TANK AIRLINE REPLACEMENT Distribution PAYGO $50,000 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 UTILITIES DEPARTMENT CONFERENCE ROOM UPGRADES General PAYGO $767 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WATER RECLAMATION FACILITY #3 COMMUNICATIONS TOWER General PAYGO $19,488 $4,645 $0 $0 $0 $0 $0 $0 $0 $0 $0 ARC FLASH STUDY General PAYGO $9,047 $0 $0 $0 $25,000 $0 $0 $0 $0 $25,000 $0 WRCRWA BOOSTER PUMP STATION Distribution PAYGO $225,000 $2,500,000 $2,500,000 $0 $0 $0 $0 $0 $0 $0 $0 FLOW METER UPGRADE AT VARIOUS LOCATIONS Meters PAYGO $50,000 $0 $50,000 $0 $50,000 $0 $0 $0 $0 $0 $0 RECLAIMED WATERLINE INFRASTRUCTURE Distribution PAYGO $30,000 $60,118 $61,320 $62,547 $63,798 $65,074 $66,375 $67,702 $69,057 $72,510 $76,136 ADJACENT IRRIGATION CONVERSION Distribution PAYGO $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 BOOSTER STATION REHABILITATION AT VARIOUS LOCATIONS Distribution PAYGO $50,000 $61,146 $61,146 $61,146 $0 $0 $0 $0 $0 $0 $0 WRCRWA FLOW CONTROL IMPROVEMENTS (XVI) Distribution PAYGO $819,650 $2,675,937 $0 $0 $0 $0 $0 $0 $0 $0 $0 BORDER RECLAIMED BOOSTER STATION PUMP REPLACEMENT Distribution PAYGO $106,164 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 DEVELOPMENT METERS Meters PAYGO $31,185 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RIVER RD RWL-CORYDON-LINCOLN Distribution PAYGO $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 CALIFORNIA INDUSTRIAL COMPLEX RECLAIMED WATERLINE Distribution PAYGO $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 OLD TEMESCAL ROAD RECLAIMED WATERLINE Distribution PAYGO $4,121 $0 $3,611,453 $0 $0 $0 $0 $0 $0 $0 $0 SCADA PANEL REPLACEMENT General PAYGO $0 $0 $0 $0 $125,781 $125,781 $125,781 $125,781 $125,781 $125,781 $125,781 WRCRWA RECLAIMED WATERLINE Mains PAYGO $390,130 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VEHICLE PROCUREMENT General PAYGO $53,120 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 BUSINESS PROCESS MAPPING General PAYGO $7,093 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WATER RECLAMATION FACILITY #3 COMMUNICATIONS TOWER General PAYGO $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 CITYWIDE METER REPLACEMENT Meters PAYGO $288,696 $0 $0 $30,232 $103,693 $34,212 $10,978 $28,655 $39,709 $18,895 $22,321

135 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Debt Service – Reclaimed Water
Fixed Revenue/Growth Projections – Sewer
Other Revenues – Sewer
Operating Expenses – Sewer
Description Category Utility Funding Source FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Reclaimed Water Debt Service Principal Water Rates $2,125,225 $2,187,532 $2,250,562 $367,325 $386,187 $400,054 $417,257 $436,902 $458,942 $481,975 $118,299 Reclaimed Water Debt Service Interest Water Rates $297,836 $239,652 $180,697 $119,776 $103,985 $88,762 $73,407 $55,543 $35,978 $15,327 $3,196 $8,000,000 FY 2025 $8,080,000
Interest Rate 5.0%
Bond Term 10 $8,080,000 $7,443,963 $6,780,125 $6,083,095 $5,351,213 $4,582,737 $3,775,837 $2,928,592 $2,038,985 $1,104,898 Issuance Expense $80,000
Principal $636,037 $663,838 $697,030 $731,882 $768,476 $806,900 $847,245 $889,607 $934,087 $980,792 Interest $400,000 $372,198 $339,006 $304,155 $267,561 $229,137 $188,792 $146,430 $101,949 $55,245 $6,000,000 FY 2026 $6,060,000
Interest Rate 5.0%
Bond Term 8 $6,060,000 $5,431,669 $4,774,922 $4,085,337 $3,361,273 $2,601,006 $1,802,725 $964,530 $84,426 Issuance Expense $60,000
Principal $628,331 $656,747 $689,585 $724,064 $760,267 $798,281 $838,195 $880,104 Interest $300,000 $271,583 $238,746 $204,267 $168,064 $130,050 $90,136 $48,227 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Inside Standard Sewer $27,126,893 $27,262,598 $27,398,851 $27,535,651 $27,673,546 $27,811,987 $27,950,976 $28,090,512 $28,231,142 $28,372,320 Inside Standard Sewer Billed Units 49,574 49,822 50,071 50,321 50,573 50,826 51,080 51,335 51,592 51,850 Inside Commercial $4,301,493 $4,323,824 $4,346,154 $4,368,485 $4,390,816 $4,413,147 $4,435,477 $4,457,808 $4,480,139 $4,502,469 5/8" 143 144 145 146 147 148 149 150 151 152
3/4" 177 178 179 180 181 182 183 184 185 186
1" 569 572 575 578 581 584 587 590 593 596
1 1/2" 505 508 511 514 517 520 523 526 529 532
2" 539 542 545 548 551 554 557 560 563 566
3" 25 25 25 25 25 25 25 25 25 25
4" 10 10 10 10 10 10 10 10 10 10
6" 4 4 4 4 4 4 4 4 4 4
8"
Special $398,400 $398,400 $398,400 $398,400 $398,400 $398,400 $398,400 $398,400 $398,400 $398,400 Less than or equal to 1" 50 50 50 50 50 50 50 50 50 50
Larger than 1" 94 94 94 94 94 94 94 94 94 94
Motels and Hotels $300,308 $301,765 $303,223 $304,680 $306,137 $307,594 $309,052 $310,509 $311,966 $313,424 Accounts 24 24 24 24 24 24 24 24 24 24
Units 3,153 3,169 3,185 3,201 3,217 3,233 3,249 3,265 3,281 3,297 Laundries $1,742 $1,742 $1,742 $1,742 $1,742 $1,742 $1,742 $1,742 $1,742 $1,742 Accounts 6 6 6 6 6 6 6 6 6 6
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Other Operating Revenue $618,967 $618,967 $584,967 $584,967 $584,967 $584,967 $584,967 $584,967 $584,967 $584,967 $584,967 INDUSTRIAL DISCHARGE PERMITS $52,671.00 $52,671 $52,671 $52,671 $52,671 $52,671 $52,671 $52,671 $52,671 $52,671 $52,671 PENALTIES $308,000.00 $308,000 $308,000 $308,000 $308,000 $308,000 $308,000 $308,000 $308,000 $308,000 $308,000 PRETREATMENT PROG SURCHARGE $62,000.00 $62,000 $62,000 $62,000 $62,000 $62,000 $62,000 $62,000 $62,000 $62,000 $62,000 UTILITY LOCATING & MARKING $4,296.00 $4,296 $4,296 $4,296 $4,296 $4,296 $4,296 $4,296 $4,296 $4,296 $4,296 PRETREATMENT GREASE INTERCEPT $137,000.00 $137,000 $137,000 $137,000 $137,000 $137,000 $137,000 $137,000 $137,000 $137,000 $137,000 UTILITY BILLING SVCS REIMB $34,000.00 $34,000 $0 $0 $0 $0 $0 $0 $0 $0 $0 SERVICES TO OTHER FUNDS $21,000.00 $21,000 $21,000 $21,000 $21,000 $21,000 $21,000 $21,000 $21,000 $21,000 $21,000 DAMAGE RECOVERY $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
Non-Operating Revenue $1,186,042 $1,190,441 $1,214,238 $1,238,511 $1,263,269 $1,288,522 $1,314,281 $1,340,554 $1,367,354 $1,394,689 $1,422,570 INTEREST ON INVESTMENTS $1,166,511.00 $1,189,841 $1,213,638 $1,237,911 $1,262,669 $1,287,922 $1,313,681 $1,339,954 $1,366,754 $1,394,089 $1,421,970 OTHER INTEREST INCOME $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 GASB31 GAIN/LOSS ON INVESTMENT $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 GAIN OR LOSS INVESTMENT SALE $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 GIS MAP FEES $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MISCELLANEOUS INCOME/REFUNDS $600.00 $600 $600 $600 $600 $600 $600 $600 $600 $600 $600 MISCELLANEOUS INCOME/REFUNDS $0.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PREMIUM ON SALE OF BOND $18,931.00 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Total $30,229,063 $31,916,269 $33,383,179 $34,810,635 $36,046,819 $37,306,961 $38,613,980 $39,969,737 $41,376,171 $42,835,302 $44,349,236 TEMPORARY EMPLOYEES $3,407 $3,680 $3,974 $4,292 $4,464 $4,642 $4,828 $5,021 $5,222 $5,431 $5,648 PST DEFERRED COMPENSATION $45 $49 $52 $57 $59 $61 $64 $66 $69 $72 $75 MEDICARE $49 $51 $52 $54 $56 $57 $59 $61 $63 $65 $67
WORKERS COMP $68 $70 $72 $75 $77 $80 $82 $85 $87 $90 $93 STATE UNEMPLOYMENT INSURANCE $3 $3 $3 $3 $3 $4 $4 $4 $4 $4 $4 PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERMANENT EMPLOYEES $35,076 $37,882 $40,913 $44,186 $45,953 $47,791 $49,703 $51,691 $53,759 $55,909 $58,145 SP COMP-BILINGUAL $403 $435 $470 $508 $528 $549 $571 $594 $618 $642 $668 SPECIAL DUTY PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

136 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study DEFERRED COMPENSATION MATCH $75 $81 $87 $94 $98 $102 $106 $111 $115 $120 $124 TIERED EMP DEF COMPENSATION $90 $97 $105 $113 $118 $123 $128 $133 $138 $143 $149 TIERED RHS BENEFIT $30 $31 $32 $33 $34 $35 $36 $37 $39 $40 $41 LONGEVITY $175 $181 $186 $192 $198 $205 $211 $218 $225 $232 $240 PERS-NORMAL $3,524 $3,637 $3,753 $3,873 $3,997 $4,125 $4,257 $4,393 $4,534 $4,679 $4,829 MEDICARE $1,060 $1,094 $1,129 $1,165 $1,202 $1,241 $1,281 $1,321 $1,364 $1,407 $1,452 SHORT TERM DISABILITY $111 $115 $118 $122 $126 $130 $134 $138 $143 $147 $152 LONG TERM DISABILITY $239 $247 $255 $263 $271 $280 $289 $298 $307 $317 $327 WORKERS COMP $710 $733 $756 $780 $805 $831 $858 $885 $913 $943 $973 STATE UNEMPLOYMENT INSURANCE $33 $34 $35 $36 $38 $39 $40 $42 $43 $45 $46 HEALTH INSURANCE $8,020 $8,293 $8,575 $8,866 $9,168 $9,479 $9,802 $10,135 $10,479 $10,836 $11,204 LIFE INSURANCE $290 $300 $310 $321 $331 $343 $354 $366 $379 $392 $405 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$14,452 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SAFETY SHOES - MOU ITEM $60 $62 $64 $66 $68 $70 $72 $74 $76 $78 $80 PERMANENT EMPLOYEES (Capital) $508,257 $548,918 $592,831 $640,257 $665,868 $692,502 $720,203 $749,011 $778,971 $810,130 $842,535 SPECIAL ASSIGNMENT PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $3,218 $3,475 $3,753 $4,054 $4,216 $4,385 $4,560 $4,742 $4,932 $5,129 $5,334 TEMPORARY EMPLOYEES $17,394 $18,786 $20,288 $21,911 $22,788 $23,699 $24,647 $25,633 $26,659 $27,725 $28,834 OVERTIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
AUTO ALLOWANCE $576 $622 $672 $726 $755 $785 $816 $849 $883 $918 $955 DEFERRED COMPENSATION MATCH $3,058 $3,303 $3,567 $3,852 $4,006 $4,167 $4,333 $4,507 $4,687 $4,874 $5,069 PST DEFERRED COMPENSATION $225 $243 $262 $283 $295 $307 $319 $332 $345 $359 $373 TIERED EMP DEF COMPENSATION $972 $1,050 $1,134 $1,224 $1,273 $1,324 $1,377 $1,432 $1,490 $1,549 $1,611 TIERED RHS BENEFIT $912 $941 $971 $1,002 $1,034 $1,068 $1,102 $1,137 $1,173 $1,211 $1,250 LONGEVITY $3,199 $3,301 $3,407 $3,516 $3,629 $3,745 $3,864 $3,988 $4,116 $4,247 $4,383 ANNUAL LEAVE BUYBACK $16,740 $17,276 $17,829 $18,399 $18,988 $19,595 $20,222 $20,870 $21,537 $22,227 $22,938 ANNUAL LEAVE OVER MAX $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERS-NORMAL $61,926 $63,908 $65,953 $68,063 $70,241 $72,489 $74,809 $77,202 $79,673 $82,222 $84,854 MEDICARE $16,187 $16,705 $17,240 $17,791 $18,361 $18,948 $19,554 $20,180 $20,826 $21,492 $22,180 SHORT TERM DISABILITY $1,627 $1,679 $1,733 $1,788 $1,845 $1,905 $1,965 $2,028 $2,093 $2,160 $2,229 LONG TERM DISABILITY $3,456 $3,567 $3,681 $3,799 $3,920 $4,046 $4,175 $4,309 $4,446 $4,589 $4,736 WORKERS COMP $10,613 $10,953 $11,303 $11,665 $12,038 $12,423 $12,821 $13,231 $13,654 $14,091 $14,542 STATE UNEMPLOYMENT INSURANCE $496 $513 $530 $548 $567 $586 $606 $627 $648 $670 $693 HEALTH INSURANCE $89,656 $92,704 $95,856 $99,115 $102,485 $105,970 $109,573 $113,298 $117,150 $121,133 $125,252 OPT OUT HEALTH INSURANCE $1,848 $1,911 $1,976 $2,043 $2,112 $2,184 $2,259 $2,335 $2,415 $2,497 $2,582 LIFE INSURANCE $4,216 $4,359 $4,508 $4,661 $4,819 $4,983 $5,153 $5,328 $5,509 $5,696 $5,890 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$151,573 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
COMPUTER EQUIPMENT & SOFTWARE $3,000 $3,104 $3,212 $3,300 $3,391 $3,484 $3,580 $3,679 $3,780 $3,884 $3,990 SAFETY SHOES - MOU ITEM $1,233 $1,276 $1,320 $1,357 $1,394 $1,432 $1,471 $1,512 $1,553 $1,596 $1,640 OFFICE SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROGRAM EXPENDITURES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CONFERENCE, TRAINING & TRAVEL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES (General) $509,111 $549,840 $593,827 $641,333 $666,987 $693,666 $721,413 $750,269 $780,280 $811,491 $843,951 SP COMP-BILINGUAL $3,104 $3,352 $3,621 $3,910 $4,067 $4,229 $4,398 $4,574 $4,757 $4,948 $5,145 TEMPORARY EMPLOYEES $7,535 $8,138 $8,789 $9,492 $9,872 $10,266 $10,677 $11,104 $11,548 $12,010 $12,491 OVERTIME $6,720 $7,258 $7,838 $8,465 $8,804 $9,156 $9,522 $9,903 $10,299 $10,711 $11,140 AUTO ALLOWANCE $2,592 $2,685 $2,781 $2,880 $2,983 $3,090 $3,200 $3,315 $3,433 $3,556 $3,683 DEFERRED COMPENSATION MATCH $3,990 $4,309 $4,654 $5,026 $5,227 $5,436 $5,654 $5,880 $6,115 $6,360 $6,614 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $990 $1,069 $1,155 $1,247 $1,297 $1,349 $1,403 $1,459 $1,517 $1,578 $1,641 TIERED RHS BENEFIT $990 $1,022 $1,054 $1,088 $1,123 $1,159 $1,196 $1,234 $1,274 $1,314 $1,357 LONGEVITY $6,640 $6,852 $7,072 $7,298 $7,532 $7,773 $8,021 $8,278 $8,543 $8,816 $9,098 ANNUAL LEAVE BUYBACK $12,423 $12,821 $13,231 $13,654 $14,091 $14,542 $15,007 $15,488 $15,983 $16,495 $17,023 ANNUAL LEAVE OVER MAX $816 $842 $869 $897 $926 $955 $986 $1,017 $1,050 $1,083 $1,118 PERS-NORMAL $63,326 $65,352 $67,444 $69,602 $71,829 $74,128 $76,500 $78,948 $81,474 $84,081 $86,772 MEDICARE $16,294 $16,815 $17,354 $17,909 $18,482 $19,073 $19,684 $20,314 $20,964 $21,634 $22,327 SHORT TERM DISABILITY $1,627 $1,679 $1,733 $1,788 $1,845 $1,905 $1,965 $2,028 $2,093 $2,160 $2,229 LONG TERM DISABILITY $3,462 $3,573 $3,687 $3,805 $3,927 $4,053 $4,182 $4,316 $4,454 $4,597 $4,744 WORKERS COMP $10,549 $10,887 $11,235 $11,594 $11,965 $12,348 $12,744 $13,151 $13,572 $14,006 $14,455 STATE UNEMPLOYMENT INSURANCE $499 $516 $534 $552 $570 $590 $610 $631 $652 $674 $697 HEALTH INSURANCE $117,020 $120,999 $125,113 $129,366 $133,765 $138,313 $143,016 $147,878 $152,906 $158,105 $163,480 RETIREES HEALTH INSURANCE/OPEB $390,986 $404,280 $418,025 $432,238 $446,934 $462,130 $477,842 $494,089 $510,888 $528,258 $546,219 OPT OUT HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LIFE INSURANCE $4,224 $4,368 $4,516 $4,670 $4,828 $4,993 $5,162 $5,338 $5,519 $5,707 $5,901 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$14,526 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CONSTRUCTION MATERIALS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

137 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study SAFETY MATERIALS/CONSTRUCTION $225 $238 $252 $267 $282 $294 $305 $317 $330 $343 $357 COMPUTER EQUIPMENT & SOFTWARE $1,305 $1,350 $1,397 $1,436 $1,475 $1,516 $1,557 $1,600 $1,644 $1,689 $1,736 SAFETY SHOES - MOU ITEM $135 $140 $145 $149 $153 $157 $161 $166 $170 $175 $180 ADVERTISING EXPENSE $608 $629 $651 $669 $687 $706 $726 $746 $766 $787 $809 WIRELESS COMMUNICATION $2,648 $2,740 $2,835 $2,913 $2,993 $3,076 $3,160 $3,247 $3,336 $3,428 $3,522 PHONES, FAX, ISDN LINES $10,801 $11,176 $11,565 $11,883 $12,210 $12,545 $12,890 $13,244 $13,608 $13,983 $14,367 POSTAGE & SHIPPING $250 $259 $268 $275 $283 $290 $298 $307 $315 $324 $333 OFFICE SUPPLIES $5,400 $5,588 $5,782 $5,941 $6,104 $6,272 $6,444 $6,622 $6,804 $6,991 $7,183 PROGRAM EXPENDITURES $9,335 $9,659 $9,995 $10,270 $10,552 $10,842 $11,140 $11,447 $11,761 $12,085 $12,417 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $540 $559 $578 $594 $610 $627 $644 $662 $680 $699 $718 RENTS & LEASES $795,563 $823,217 $851,832 $875,249 $899,309 $924,031 $949,433 $975,533 $1,002,350 $1,029,905 $1,058,217 MILEAGE/VEHICLE EXP REIMB $225 $233 $241 $250 $259 $268 $278 $288 $298 $309 $320 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $66,865 $69,189 $71,594 $73,563 $75,585 $77,663 $79,798 $81,991 $84,245 $86,561 $88,941 INSURANCE & SURETY BONDS $54,282 $56,169 $58,121 $59,719 $61,361 $63,048 $64,781 $66,562 $68,391 $70,271 $72,203 INSURANCE PREMIUMS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MEMBERSHIP & DUES $36,652 $37,926 $39,244 $40,323 $41,432 $42,571 $43,741 $44,943 $46,179 $47,448 $48,753 CONFERENCE, TRAINING & TRAVEL $10,800 $11,175 $11,564 $11,882 $12,208 $12,544 $12,889 $13,243 $13,607 $13,981 $14,366 LEGAL SERVICES-SPECIAL COUNSEL $22,500 $23,282 $24,091 $24,754 $25,434 $26,133 $26,852 $27,590 $28,348 $29,128 $29,928 BOOKS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
JOB REQ CERTIFICATES & LICENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 BAD DEBTS EXPENSE $60,462 $62,564 $64,738 $66,518 $68,347 $70,225 $72,156 $74,140 $76,178 $78,272 $80,423 ADMINISTRATIVE SERVICES CHARGE $1,661,969 $1,719,739 $1,779,517 $1,828,436 $1,878,700 $1,930,345 $1,983,410 $2,037,934 $2,093,957 $2,151,520 $2,210,665 INTERNAL SVC CHRG-WAREHOUSE $56,936 $58,915 $60,963 $62,639 $64,361 $66,130 $67,948 $69,816 $71,735 $73,707 $75,733 INTERNAL SVC CHRG-INFO TECH $1,590,944 $1,646,245 $1,703,469 $1,750,297 $1,798,413 $1,847,851 $1,898,649 $1,950,842 $2,004,471 $2,059,574 $2,116,192 INTERNAL SVC CHRG-NPDES $156,082 $161,507 $167,121 $171,716 $176,436 $181,286 $186,270 $191,390 $196,652 $202,058 $207,612 LOSS ON FIXED ASSET DISPOSAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PERMANENT EMPLOYEES (Regulatory) $108,994 $117,714 $127,131 $137,301 $142,793 $148,505 $154,445 $160,623 $167,048 $173,730 $180,679 OVERTIME $786 $849 $917 $990 $1,030 $1,071 $1,114 $1,158 $1,205 $1,253 $1,303 DEFERRED COMPENSATION MATCH $225 $243 $262 $283 $295 $307 $319 $332 $345 $359 $373 TIERED EMP DEF COMPENSATION $270 $292 $315 $340 $354 $368 $383 $398 $414 $430 $448 TIERED RHS BENEFIT $90 $93 $96 $99 $102 $105 $109 $112 $116 $119 $123 LONGEVITY $450 $464 $479 $495 $510 $527 $544 $561 $579 $597 $617 PERS-NORMAL $13,165 $13,586 $14,021 $14,470 $14,933 $15,411 $15,904 $16,413 $16,938 $17,480 $18,039 MEDICARE $3,369 $3,477 $3,588 $3,703 $3,821 $3,944 $4,070 $4,200 $4,334 $4,473 $4,616 SHORT TERM DISABILITY $349 $360 $372 $384 $396 $409 $422 $435 $449 $463 $478 LONG TERM DISABILITY $741 $765 $789 $814 $840 $867 $895 $924 $953 $984 $1,015 WORKERS COMP $2,220 $2,291 $2,364 $2,440 $2,518 $2,599 $2,682 $2,768 $2,856 $2,948 $3,042 STATE UNEMPLOYMENT INSURANCE $101 $104 $108 $112 $115 $119 $123 $128 $132 $136 $141 HEALTH INSURANCE $8,370 $8,655 $8,949 $9,253 $9,568 $9,893 $10,229 $10,577 $10,937 $11,309 $11,693 OPT OUT HEALTH INSURANCE $3,240 $3,350 $3,464 $3,582 $3,704 $3,830 $3,960 $4,094 $4,234 $4,378 $4,526 LIFE INSURANCE $905 $936 $968 $1,000 $1,035 $1,070 $1,106 $1,144 $1,183 $1,223 $1,264 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$1,791 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CONSTRUCTION MATERIALS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SAFETY MATERIALS/CONSTRUCTION $100 $106 $112 $119 $126 $131 $136 $141 $147 $152 $159 COMPUTER EQUIPMENT & SOFTWARE $17,177 $17,774 $18,392 $18,897 $19,417 $19,951 $20,499 $21,063 $21,642 $22,237 $22,848 SAFETY SHOES - MOU ITEM $405 $419 $434 $446 $458 $470 $483 $497 $510 $524 $539 ADVERTISING EXPENSE $300 $310 $321 $330 $339 $348 $358 $368 $378 $388 $399 POSTAGE & SHIPPING $3,346 $3,462 $3,583 $3,681 $3,782 $3,886 $3,993 $4,103 $4,216 $4,332 $4,451 OFFICE SUPPLIES $300 $310 $321 $330 $339 $348 $358 $368 $378 $388 $399 PROGRAM EXPENDITURES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
RECYCLED CONTENT PRODUCTS $30 $31 $32 $33 $34 $35 $36 $37 $38 $39 $40 OTHER FUELS $60 $62 $64 $67 $69 $72 $74 $77 $79 $82 $85 MOTOR POOL RENTAL - OPS & MTCE $2,090 $2,165 $2,242 $2,322 $2,405 $2,491 $2,581 $2,673 $2,769 $2,868 $2,970 MILEAGE/VEHICLE EXP REIMB $150 $155 $161 $167 $173 $179 $185 $192 $199 $206 $213 PROF. & CONT. SVCS $361,881 $374,460 $387,476 $398,128 $409,072 $420,318 $431,872 $443,745 $455,943 $468,477 $481,355 CONFERENCE, TRAINING & TRAVEL $8,500 $8,795 $9,101 $9,351 $9,608 $9,873 $10,144 $10,423 $10,709 $11,004 $11,306 OUTSIDE LAB ANALYSIS $46,265 $47,873 $49,537 $50,899 $52,298 $53,736 $55,213 $56,731 $58,290 $59,893 $61,539 REGULATORY PERMIT & USE FEES $225,736 $233,583 $241,702 $248,346 $255,173 $262,188 $269,396 $276,801 $284,411 $292,229 $300,262 JOB REQ CERTIFICATES & LICENSE $405 $419 $434 $446 $458 $470 $483 $497 $510 $524 $539 PERMANENT EMPLOYEES (Operations) $1,589,557 $1,716,722 $1,854,059 $2,002,384 $2,082,479 $2,165,779 $2,252,410 $2,342,506 $2,436,206 $2,533,655 $2,635,001 SHIFT DIFFERENTIAL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OUT OF CLASS PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $12,087 $13,054 $14,098 $15,226 $15,835 $16,469 $17,127 $17,812 $18,525 $19,266 $20,037 SP COMP-GRADE 5 CERT PAY $59,810 $64,595 $69,762 $75,343 $78,357 $81,491 $84,751 $88,141 $91,667 $95,333 $99,147 OVERTIME $374,203 $404,139 $436,470 $471,388 $490,244 $509,853 $530,247 $551,457 $573,516 $596,456 $620,314 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

138 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study SPECIAL DUTY PAY $13,610 $14,699 $15,875 $17,145 $17,830 $18,544 $19,285 $20,057 $20,859 $21,693 $22,561 DEFERRED COMPENSATION MATCH $8,735 $9,434 $10,189 $11,004 $11,444 $11,901 $12,378 $12,873 $13,388 $13,923 $14,480 TIERED EMP DEF COMPENSATION $5,010 $5,411 $5,844 $6,311 $6,564 $6,826 $7,099 $7,383 $7,678 $7,986 $8,305 TIERED RHS BENEFIT $2,430 $2,508 $2,588 $2,671 $2,756 $2,844 $2,936 $3,029 $3,126 $3,226 $3,330 LONGEVITY $13,419 $13,848 $14,292 $14,749 $15,221 $15,708 $16,211 $16,729 $17,265 $17,817 $18,387 ANNUAL LEAVE BUYBACK $51,366 $53,010 $54,706 $56,457 $58,263 $60,128 $62,052 $64,037 $66,087 $68,201 $70,384 ANNUAL LEAVE OVER MAX $1,208 $1,247 $1,287 $1,328 $1,370 $1,414 $1,459 $1,506 $1,554 $1,604 $1,655 PERS-NORMAL $201,869 $208,329 $214,995 $221,875 $228,975 $236,302 $243,864 $251,668 $259,721 $268,032 $276,609 MEDICARE $62,883 $64,895 $66,972 $69,115 $71,327 $73,609 $75,965 $78,396 $80,904 $83,493 $86,165 SHORT TERM DISABILITY $5,084 $5,246 $5,414 $5,588 $5,766 $5,951 $6,141 $6,338 $6,541 $6,750 $6,966 LONG TERM DISABILITY $10,804 $11,149 $11,506 $11,874 $12,254 $12,647 $13,051 $13,469 $13,900 $14,345 $14,804 WORKERS COMP $34,142 $35,235 $36,362 $37,526 $38,727 $39,966 $41,245 $42,565 $43,927 $45,333 $46,783 STATE UNEMPLOYMENT INSURANCE $1,902 $1,966 $2,033 $2,102 $2,174 $2,248 $2,324 $2,403 $2,485 $2,569 $2,657 HEALTH INSURANCE $293,625 $303,608 $313,931 $324,605 $335,641 $347,053 $358,853 $371,054 $383,670 $396,714 $410,203 OPT OUT HEALTH INSURANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LIFE INSURANCE $13,197 $13,646 $14,110 $14,589 $15,085 $15,598 $16,129 $16,677 $17,244 $17,830 $18,437 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$34,717 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $13,555 $14,640 $15,811 $17,076 $17,759 $18,469 $19,208 $19,976 $20,775 $21,606 $22,470 MINOR EQUIPMENT & FURNITURE $13,000 $13,452 $13,919 $14,302 $14,695 $15,099 $15,514 $15,941 $16,379 $16,829 $17,292 CONSTRUCTION MATERIALS $15,500 $16,407 $17,367 $18,383 $19,459 $20,231 $21,033 $21,867 $22,735 $23,637 $24,574 SAFETY MATERIALS/CONSTRUCTION $10,000 $10,585 $11,204 $11,860 $12,554 $13,052 $13,570 $14,108 $14,668 $15,250 $15,855 COMPUTER EQUIPMENT & SOFTWARE $12,141 $12,563 $13,000 $13,357 $13,724 $14,102 $14,489 $14,887 $15,297 $15,717 $16,149 UNIFORM EXPENSE $8,746 $9,050 $9,365 $9,622 $9,887 $10,158 $10,438 $10,724 $11,019 $11,322 $11,633 SAFETY SHOES - MOU ITEM $4,470 $4,625 $4,786 $4,918 $5,053 $5,192 $5,335 $5,481 $5,632 $5,787 $5,946 ADVERTISING EXPENSE $1,800 $1,863 $1,927 $1,980 $2,035 $2,091 $2,148 $2,207 $2,268 $2,330 $2,394 PROMOTIONAL/PUBLIC OUTREACH $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 WIRELESS COMMUNICATION $9,250 $9,572 $9,904 $10,177 $10,456 $10,744 $11,039 $11,343 $11,654 $11,975 $12,304 PHONES, FAX, ISDN LINES $1,080 $1,118 $1,156 $1,188 $1,221 $1,254 $1,289 $1,324 $1,361 $1,398 $1,437 POSTAGE & SHIPPING $408 $422 $437 $449 $461 $474 $487 $500 $514 $528 $543 OFFICE SUPPLIES $504 $522 $540 $554 $570 $585 $601 $618 $635 $652 $670 FIRST AID KIT SUPPLIES $240 $248 $257 $264 $271 $279 $286 $294 $302 $311 $319 PROGRAM EXPENDITURES $1,700 $1,759 $1,820 $1,870 $1,922 $1,975 $2,029 $2,085 $2,142 $2,201 $2,261 RECYCLED CONTENT PRODUCTS $50 $52 $54 $55 $57 $58 $60 $61 $63 $65 $67 ELECTRIC UTILITY $1,734,412 $1,793,852 $1,855,329 $1,918,913 $1,984,676 $2,052,693 $2,123,041 $2,195,800 $2,271,052 $2,348,883 $2,429,382 NATURAL GAS UTILITY $57,600 $59,574 $61,616 $63,727 $65,911 $68,170 $70,506 $72,923 $75,422 $78,007 $80,680 WATER UTILITY $64,575 $66,788 $69,077 $71,444 $73,893 $76,425 $79,044 $81,753 $84,555 $87,453 $90,450 RECYCLED WATER UTILITY $645,750 $667,880 $690,769 $714,443 $738,927 $764,251 $790,443 $817,532 $845,550 $874,528 $904,499 UNLEADED FUEL $600 $621 $642 $664 $687 $710 $734 $760 $786 $813 $840 RENTS & LEASES $21,864 $22,624 $23,410 $24,054 $24,715 $25,395 $26,093 $26,810 $27,547 $28,304 $29,082 MOTOR POOL RENTAL - OPS & MTCE $35,457 $36,725 $38,039 $39,399 $40,809 $42,268 $43,780 $45,346 $46,968 $48,648 $50,388 DIRECT VEHICLE EXPENSE $8,772 $9,086 $9,411 $9,747 $10,096 $10,457 $10,831 $11,219 $11,620 $12,035 $12,466 OTHER EQUIPMENT RENTAL $31,819 $32,925 $34,070 $35,006 $35,968 $36,957 $37,973 $39,017 $40,090 $41,192 $42,324 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 SCADA MAINTENANCE $310,026 $320,803 $331,954 $341,079 $350,455 $360,089 $369,988 $380,159 $390,610 $401,348 $412,381 MOWING/LANDSCAPE CONTRACTS $111,991 $115,884 $119,912 $123,208 $126,595 $130,075 $133,651 $137,325 $141,100 $144,979 $148,965 PROF. & CONT. SVCS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
REFUSE DISPOSAL $90,588 $93,737 $96,995 $99,662 $102,401 $105,216 $108,109 $111,081 $114,134 $117,272 $120,495 CONFERENCE, TRAINING & TRAVEL $15,000 $15,521 $16,061 $16,502 $16,956 $17,422 $17,901 $18,393 $18,899 $19,418 $19,952 CHEMICALS-NITROGEN $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CHEMICALS-SODIUM BISOLFITE $120,560 $126,950 $133,678 $140,763 $148,223 $156,079 $164,351 $173,062 $182,234 $191,893 $202,063 CHEMICALS-MINERAL OIL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CHEMICALS-POLYMER $1,643,968 $1,731,098 $1,822,847 $1,919,457 $2,021,189 $2,128,312 $2,241,112 $2,359,891 $2,484,965 $2,616,668 $2,755,352 CHEMICALS-ALUM $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
CHEMICALS-SODIUM HYPOCHLORITE $2,238,500 $2,357,141 $2,482,069 $2,613,619 $2,752,140 $2,898,004 $3,051,598 $3,213,333 $3,383,639 $3,562,972 $3,751,810 CHEMICALS-FERRIC CHLORIDE $135,520 $142,703 $150,266 $158,230 $166,616 $175,447 $184,745 $194,537 $204,847 $215,704 $227,137 CHEMICALS-MISC $25,000 $26,325 $27,720 $29,189 $30,736 $32,365 $34,081 $35,887 $37,789 $39,792 $41,901 BIOSOLIDS DISPOSAL/RECYCLE $1,800,000 $1,862,568 $1,927,311 $1,980,293 $2,034,731 $2,090,666 $2,148,138 $2,207,190 $2,267,866 $2,330,210 $2,394,267 OUTSIDE LAB ANALYSIS $515,935 $533,869 $552,426 $567,612 $583,216 $599,249 $615,722 $632,648 $650,040 $667,909 $686,270 JOB REQ CERTIFICATES & LICENSE $720 $745 $771 $792 $814 $836 $859 $883 $907 $932 $958 LAB CHEMICALS AND SUPPLIES $37,632 $38,940 $40,294 $41,401 $42,539 $43,709 $44,910 $46,145 $47,414 $48,717 $50,056 PREVENTION & MAINTENANCE MATLS $3,177 $3,287 $3,402 $3,495 $3,591 $3,690 $3,791 $3,896 $4,003 $4,113 $4,226 INLAND EMPIRE BRINE LINE-SARI $7,755 $8,025 $8,303 $8,532 $8,766 $9,007 $9,255 $9,509 $9,771 $10,039 $10,315 FINES AND PENALTIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
WRCRWA CAP ASSET CONTRIBUTION $1,092,443 $1,130,416 $1,169,710 $1,201,865 $1,234,904 $1,268,852 $1,303,732 $1,339,572 $1,376,397 $1,414,234 $1,453,111 WRCRWA TRTMNT/CONVEYANCE $1,839,905 $1,903,860 $1,970,038 $2,024,195 $2,079,840 $2,137,015 $2,195,761 $2,256,123 $2,318,143 $2,381,869 $2,447,347 LICENSED VEHICLES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MACHINERY, EQUIPMENT, & FIXTUR $664,818 $687,927 $711,839 $731,408 $751,514 $772,173 $793,400 $815,211 $837,621 $860,647 $884,307 PERMANENT EMPLOYEES (INFRA) $540,896 $584,168 $630,901 $681,373 $708,628 $736,973 $766,452 $797,110 $828,995 $862,155 $896,641 SPECIAL ASSIGNMENT PAY $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0

139 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study FINAL LEAVE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SP COMP-BILINGUAL $6,999 $7,559 $8,164 $8,817 $9,169 $9,536 $9,918 $10,314 $10,727 $11,156 $11,602 SP COMP-GRADE 4 CERT PAY $5,640 $6,091 $6,578 $7,105 $7,389 $7,685 $7,992 $8,312 $8,644 $8,990 $9,349 SP COMP-GRADE 5 CERT PAY $14,055 $15,179 $16,394 $17,705 $18,413 $19,150 $19,916 $20,713 $21,541 $22,403 $23,299 OVERTIME $132,644 $143,256 $154,716 $167,093 $173,777 $180,728 $187,957 $195,475 $203,294 $211,426 $219,883 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
SPECIAL DUTY PAY $6,397 $6,909 $7,461 $8,058 $8,381 $8,716 $9,065 $9,427 $9,804 $10,196 $10,604 DEFERRED COMPENSATION MATCH $3,008 $3,249 $3,509 $3,789 $3,941 $4,098 $4,262 $4,433 $4,610 $4,795 $4,986 TIERED EMP DEF COMPENSATION $2,820 $3,046 $3,289 $3,552 $3,694 $3,842 $3,996 $4,156 $4,322 $4,495 $4,675 TIERED RHS BENEFIT $1,128 $1,164 $1,201 $1,240 $1,279 $1,320 $1,363 $1,406 $1,451 $1,498 $1,546 LONGEVITY $3,431 $3,541 $3,654 $3,771 $3,892 $4,016 $4,145 $4,277 $4,414 $4,556 $4,701 ANNUAL LEAVE BUYBACK $8,709 $8,988 $9,275 $9,572 $9,878 $10,195 $10,521 $10,857 $11,205 $11,563 $11,933 ANNUAL LEAVE OVER MAX $1,625 $1,677 $1,731 $1,786 $1,843 $1,902 $1,963 $2,026 $2,091 $2,158 $2,227 PERS-NORMAL $68,900 $71,105 $73,380 $75,728 $78,152 $80,652 $83,233 $85,897 $88,645 $91,482 $94,409 MEDICARE $21,876 $22,576 $23,299 $24,044 $24,814 $25,608 $26,427 $27,273 $28,146 $29,046 $29,976 SHORT TERM DISABILITY $1,735 $1,790 $1,848 $1,907 $1,968 $2,031 $2,096 $2,163 $2,232 $2,303 $2,377 LONG TERM DISABILITY $3,678 $3,796 $3,917 $4,042 $4,172 $4,305 $4,443 $4,585 $4,732 $4,883 $5,040 WORKERS COMP $11,635 $12,007 $12,391 $12,788 $13,197 $13,619 $14,055 $14,505 $14,969 $15,448 $15,943 STATE UNEMPLOYMENT INSURANCE $654 $676 $699 $723 $748 $773 $799 $827 $855 $884 $914 HEALTH INSURANCE $147,713 $152,735 $157,928 $163,298 $168,850 $174,591 $180,527 $186,665 $193,011 $199,574 $206,359 OPT OUT HEALTH INSURANCE $13,536 $13,996 $14,472 $14,964 $15,473 $15,999 $16,543 $17,105 $17,687 $18,288 $18,910 LIFE INSURANCE $4,492 $4,644 $4,802 $4,966 $5,134 $5,309 $5,489 $5,676 $5,869 $6,069 $6,275 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$12,256 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 -$1,383 MINOR EQUIPMENT & FURNITURE $6,450 $6,674 $6,906 $7,096 $7,291 $7,492 $7,697 $7,909 $8,127 $8,350 $8,579 CONSTRUCTION MATERIALS $46,990 $49,739 $52,650 $55,730 $58,991 $61,331 $63,764 $66,294 $68,924 $71,658 $74,500 SAFETY MATERIALS/CONSTRUCTION $5,700 $5,898 $6,103 $6,271 $6,443 $6,620 $6,802 $6,989 $7,182 $7,379 $7,582 COMPUTER EQUIPMENT & SOFTWARE $700 $724 $750 $770 $791 $813 $835 $858 $882 $906 $931 UNIFORM EXPENSE $1,425 $1,475 $1,526 $1,568 $1,611 $1,655 $1,701 $1,747 $1,795 $1,845 $1,895 SAFETY SHOES - MOU ITEM $2,397 $2,480 $2,567 $2,637 $2,710 $2,784 $2,861 $2,939 $3,020 $3,103 $3,188 ADVERTISING EXPENSE $450 $466 $482 $495 $509 $523 $537 $552 $567 $583 $599 WIRELESS COMMUNICATION $1,541 $1,595 $1,650 $1,695 $1,742 $1,790 $1,839 $1,890 $1,942 $1,995 $2,050 PHONES, FAX, ISDN LINES $48 $50 $51 $53 $54 $56 $57 $59 $60 $62 $64 POSTAGE & SHIPPING $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
OFFICE SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROGRAM EXPENDITURES $1,460 $1,511 $1,563 $1,606 $1,650 $1,696 $1,742 $1,790 $1,839 $1,890 $1,942 RECYCLED CONTENT PRODUCTS $9 $9 $10 $10 $10 $10 $11 $11 $11 $12 $12 RECYCLED WATER UTILITY $841 $870 $900 $930 $962 $995 $1,029 $1,065 $1,101 $1,139 $1,178 UNLEADED FUEL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DIESEL FUEL $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
RENTS & LEASES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MOTOR POOL RENTAL - OPS & MTCE $80,882 $83,775 $86,771 $89,875 $93,090 $96,419 $99,868 $103,440 $107,140 $110,972 $114,941 DIRECT VEHICLE EXPENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 OTHER EQUIPMENT RENTAL $18,267 $18,920 $19,597 $20,298 $21,024 $21,776 $22,555 $23,362 $24,197 $25,063 $25,959 MILEAGE/VEHICLE EXP REIMB $45 $47 $48 $50 $52 $54 $56 $58 $60 $62 $64 MTCE & REPAIR - EQUIP & FAC $6,500 $6,726 $6,960 $7,151 $7,348 $7,550 $7,757 $7,970 $8,190 $8,415 $8,646 PROF. & CONT. SVCS $449,846 $465,483 $481,663 $494,904 $508,509 $522,488 $536,851 $551,609 $566,772 $582,353 $598,362 CONFERENCE, TRAINING & TRAVEL $900 $931 $964 $990 $1,017 $1,045 $1,074 $1,104 $1,134 $1,165 $1,197 JOB REQ CERTIFICATES & LICENSE $825 $854 $883 $908 $933 $958 $985 $1,012 $1,039 $1,068 $1,097 PREVENTION & MAINTENANCE MATLS $770,170 $796,942 $824,643 $847,313 $870,605 $894,538 $919,129 $944,396 $970,357 $997,032 $1,024,441 LICENSED VEHICLES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PERMANENT EMPLOYEES (FAC) $715,911 $773,184 $835,039 $901,842 $937,915 $975,432 $1,014,449 $1,055,027 $1,097,228 $1,141,117 $1,186,762 SP COMP-BILINGUAL $2,138 $2,309 $2,494 $2,693 $2,801 $2,913 $3,030 $3,151 $3,277 $3,408 $3,544 SP COMP-GRADE 4 CERT PAY $5,640 $6,091 $6,578 $7,105 $7,389 $7,685 $7,992 $8,312 $8,644 $8,990 $9,349 SP COMP-GRADE 5 CERT PAY $17,343 $18,730 $20,229 $21,847 $22,721 $23,630 $24,575 $25,558 $26,580 $27,644 $28,749 TEMPORARY EMPLOYEES $11,871 $12,821 $13,846 $14,954 $15,552 $16,174 $16,821 $17,494 $18,194 $18,922 $19,678 OVERTIME $49,933 $53,928 $58,242 $62,901 $65,417 $68,034 $70,755 $73,586 $76,529 $79,590 $82,774 SPECIAL DUTY PAY $8,370 $9,040 $9,763 $10,544 $10,966 $11,404 $11,860 $12,335 $12,828 $13,341 $13,875 DEFERRED COMPENSATION MATCH $2,030 $2,192 $2,368 $2,557 $2,660 $2,766 $2,877 $2,992 $3,111 $3,236 $3,365 PST DEFERRED COMPENSATION $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 TIERED EMP DEF COMPENSATION $1,680 $1,814 $1,960 $2,116 $2,201 $2,289 $2,381 $2,476 $2,575 $2,678 $2,785 TIERED RHS BENEFIT $740 $764 $788 $813 $839 $866 $894 $923 $952 $983 $1,014 LONGEVITY $2,314 $2,388 $2,464 $2,543 $2,625 $2,709 $2,795 $2,885 $2,977 $3,072 $3,171 ANNUAL LEAVE BUYBACK $7,469 $7,708 $7,955 $8,209 $8,472 $8,743 $9,023 $9,312 $9,609 $9,917 $10,234 ANNUAL LEAVE OVER MAX $1,113 $1,149 $1,185 $1,223 $1,262 $1,303 $1,345 $1,388 $1,432 $1,478 $1,525 PERS-NORMAL $91,048 $93,962 $96,968 $100,071 $103,274 $106,578 $109,989 $113,508 $117,141 $120,889 $124,758 MEDICARE $24,633 $25,421 $26,235 $27,074 $27,941 $28,835 $29,757 $30,710 $31,692 $32,707 $33,753 SHORT TERM DISABILITY $2,288 $2,361 $2,437 $2,515 $2,595 $2,678 $2,764 $2,852 $2,944 $3,038 $3,135 LONG TERM DISABILITY $4,866 $5,022 $5,182 $5,348 $5,519 $5,696 $5,878 $6,066 $6,261 $6,461 $6,668

140 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study WORKERS COMP $15,433 $15,927 $16,437 $16,962 $17,505 $18,065 $18,644 $19,240 $19,856 $20,491 $21,147 STATE UNEMPLOYMENT INSURANCE $763 $789 $816 $844 $872 $902 $932 $964 $997 $1,031 $1,066 HEALTH INSURANCE $145,131 $150,065 $155,168 $160,443 $165,898 $171,539 $177,371 $183,402 $189,638 $196,085 $202,752 OPT OUT HEALTH INSURANCE $14,664 $15,163 $15,678 $16,211 $16,762 $17,332 $17,922 $18,531 $19,161 $19,812 $20,486 LIFE INSURANCE $5,942 $6,144 $6,353 $6,569 $6,792 $7,023 $7,262 $7,509 $7,764 $8,028 $8,301 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$55,321 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $43,523 $45,036 $46,601 $47,882 $49,199 $50,551 $51,941 $53,369 $54,836 $56,343 $57,892 MINOR EQUIPMENT & FURNITURE $44,100 $45,633 $47,219 $48,517 $49,851 $51,221 $52,629 $54,076 $55,563 $57,090 $58,660 CONSTRUCTION MATERIALS $904,140 $957,041 $1,013,038 $1,072,311 $1,135,051 $1,180,079 $1,226,893 $1,275,564 $1,326,165 $1,378,774 $1,433,470 SAFETY MATERIALS/CONSTRUCTION $6,000 $6,351 $6,723 $7,116 $7,532 $7,831 $8,142 $8,465 $8,801 $9,150 $9,513 COMPUTER EQUIPMENT & SOFTWARE $2,650 $2,742 $2,837 $2,915 $2,996 $3,078 $3,163 $3,249 $3,339 $3,431 $3,525 UNIFORM EXPENSE $4,243 $4,390 $4,543 $4,668 $4,796 $4,928 $5,064 $5,203 $5,346 $5,493 $5,644 SAFETY SHOES - MOU ITEM $2,337 $2,418 $2,502 $2,571 $2,642 $2,714 $2,789 $2,866 $2,944 $3,025 $3,109 ADVERTISING EXPENSE $2,025 $2,095 $2,168 $2,228 $2,289 $2,352 $2,417 $2,483 $2,551 $2,621 $2,694 WIRELESS COMMUNICATION $9,360 $9,685 $10,022 $10,298 $10,581 $10,871 $11,170 $11,477 $11,793 $12,117 $12,450 PHONES, FAX, ISDN LINES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 POSTAGE & SHIPPING $200 $207 $214 $220 $226 $232 $239 $245 $252 $259 $266 PHONES,FAX-INDIRECT DEPT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 OFFICE SUPPLIES $1,000 $1,035 $1,071 $1,100 $1,130 $1,161 $1,193 $1,226 $1,260 $1,295 $1,330 FIRST AID KIT SUPPLIES $100 $103 $107 $110 $113 $116 $119 $123 $126 $129 $133 PROGRAM EXPENDITURES $3,600 $3,725 $3,855 $3,961 $4,069 $4,181 $4,296 $4,414 $4,536 $4,660 $4,789 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $100 $103 $107 $110 $113 $116 $119 $123 $126 $129 $133 DIESEL FUEL $15,000 $15,537 $16,092 $16,668 $17,264 $17,881 $18,521 $19,184 $19,870 $20,580 $21,317 MOTOR POOL RENTAL - OPS & MTCE $67,753 $70,176 $72,686 $75,286 $77,979 $80,768 $83,657 $86,649 $89,749 $92,959 $96,284 RETAINED VEHICLE EXPENSE $2,431 $2,518 $2,608 $2,701 $2,798 $2,898 $3,002 $3,109 $3,220 $3,335 $3,455 DIRECT VEHICLE EXPENSE $750 $777 $805 $833 $863 $894 $926 $959 $993 $1,029 $1,066 OTHER EQUIPMENT RENTAL $20,428 $21,138 $21,872 $22,474 $23,092 $23,726 $24,379 $25,049 $25,737 $26,445 $27,172 MILEAGE/VEHICLE EXP REIMB $150 $155 $161 $167 $173 $179 $185 $192 $199 $206 $213 MTCE & REPAIR - EQUIP & FAC $620,649 $642,223 $664,546 $682,815 $701,585 $720,872 $740,689 $761,050 $781,972 $803,468 $825,555 SCADA MAINTENANCE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
MOWING/LANDSCAPE CONTRACTS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $145,846 $150,915 $156,161 $160,454 $164,865 $169,397 $174,054 $178,839 $183,755 $188,806 $193,997 CONFERENCE, TRAINING & TRAVEL $7,500 $7,761 $8,030 $8,251 $8,478 $8,711 $8,951 $9,197 $9,449 $9,709 $9,976 CONSTRUCTION CONTRACTS $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 JOB REQ CERTIFICATES & LICENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 LAB CHEMICALS AND SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PREVENTION & MAINTENANCE MATLS $400,000 $413,904 $428,291 $440,065 $452,162 $464,592 $477,364 $490,487 $503,970 $517,824 $532,059 MACHINERY, EQUIPMENT, & FIXTUR $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROMOTIONAL/PUBLIC OUTREACH $11,564 $11,966 $12,382 $12,722 $13,072 $13,431 $13,801 $14,180 $14,570 $14,970 $15,382 POSTAGE & SHIPPING $1,800 $1,863 $1,927 $1,980 $2,035 $2,091 $2,148 $2,207 $2,268 $2,330 $2,394 PERMANENT EMPLOYEES $393,396 $424,868 $458,857 $495,566 $515,388 $536,004 $557,444 $579,742 $602,931 $627,049 $652,131 SP COMP-BILINGUAL $3,072 $3,318 $3,583 $3,870 $4,025 $4,186 $4,353 $4,527 $4,708 $4,897 $5,092 TEMPORARY EMPLOYEES $37,155 $40,127 $43,338 $46,805 $48,677 $50,624 $52,649 $54,755 $56,945 $59,223 $61,592 OVERTIME $19,586 $21,153 $22,845 $24,673 $25,660 $26,686 $27,753 $28,864 $30,018 $31,219 $32,468 COMP TIME $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
DEFERRED COMPENSATION MATCH $1,530 $1,652 $1,785 $1,927 $2,004 $2,085 $2,168 $2,255 $2,345 $2,439 $2,536 PST DEFERRED COMPENSATION $272 $294 $318 $343 $357 $371 $386 $401 $417 $434 $451 TIERED EMP DEF COMPENSATION $1,080 $1,166 $1,260 $1,360 $1,415 $1,472 $1,530 $1,592 $1,655 $1,721 $1,790

141 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study Debt Service – Sewer
TIERED RHS BENEFIT $540 $557 $575 $594 $613 $632 $652 $673 $695 $717 $740 LONGEVITY $1,575 $1,625 $1,677 $1,731 $1,786 $1,844 $1,903 $1,964 $2,026 $2,091 $2,158 ANNUAL LEAVE BUYBACK $3,979 $4,106 $4,238 $4,373 $4,513 $4,658 $4,807 $4,961 $5,119 $5,283 $5,452 PERS-NORMAL $49,753 $51,345 $52,988 $54,684 $56,433 $58,239 $60,103 $62,026 $64,011 $66,059 $68,173 MEDICARE $13,334 $13,761 $14,201 $14,656 $15,125 $15,609 $16,108 $16,624 $17,156 $17,705 $18,271 SHORT TERM DISABILITY $1,258 $1,298 $1,340 $1,383 $1,427 $1,473 $1,520 $1,568 $1,619 $1,670 $1,724 LONG TERM DISABILITY $2,674 $2,760 $2,848 $2,939 $3,033 $3,130 $3,230 $3,334 $3,440 $3,550 $3,664 WORKERS COMP $8,782 $9,063 $9,353 $9,652 $9,961 $10,280 $10,609 $10,948 $11,298 $11,660 $12,033 STATE UNEMPLOYMENT INSURANCE $423 $438 $452 $468 $484 $500 $517 $535 $553 $572 $591 HEALTH INSURANCE $106,909 $110,544 $114,302 $118,189 $122,207 $126,362 $130,658 $135,101 $139,694 $144,444 $149,355 OPT OUT HEALTH INSURANCE $9,720 $10,050 $10,392 $10,746 $11,111 $11,489 $11,879 $12,283 $12,701 $13,133 $13,579 LIFE INSURANCE $3,262 $3,373 $3,488 $3,606 $3,729 $3,856 $3,987 $4,122 $4,262 $4,407 $4,557 HEALTH ALLOWANCE CREDIT $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 VACANCY FACTOR -$8,444 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
BUDGETARY/PAYROLL ADJUSTMENTS $17,243 $17,842 $18,462 $18,970 $19,491 $20,027 $20,577 $21,143 $21,724 $22,322 $22,935 SAFETY MATERIALS/CONSTRUCTION $450 $476 $504 $534 $565 $587 $611 $635 $660 $686 $713 COMPUTER EQUIPMENT & SOFTWARE $1,717 $1,777 $1,838 $1,889 $1,941 $1,994 $2,049 $2,105 $2,163 $2,223 $2,284 ADVERTISING EXPENSE $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
PROMOTIONAL/PUBLIC OUTREACH $3,188 $3,299 $3,413 $3,507 $3,604 $3,703 $3,805 $3,909 $4,017 $4,127 $4,241 POSTAGE & SHIPPING $114,733 $118,721 $122,848 $126,225 $129,695 $133,260 $136,924 $140,688 $144,555 $148,529 $152,612 OFFICE SUPPLIES $4,108 $4,251 $4,399 $4,519 $4,644 $4,771 $4,903 $5,037 $5,176 $5,318 $5,464 PROGRAM EXPENDITURES $3,287 $3,401 $3,519 $3,616 $3,716 $3,818 $3,923 $4,031 $4,141 $4,255 $4,372 CLEANING/JANITORIAL SUPPLIES $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 RECYCLED CONTENT PRODUCTS $270 $279 $289 $297 $305 $314 $322 $331 $340 $350 $359 MTCE & REPAIR - EQUIP & FAC $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 PROF. & CONT. SVCS $96,942 $100,312 $103,799 $106,652 $109,584 $112,596 $115,692 $118,872 $122,140 $125,497 $128,947 CUST CREDIT CRD PROCESSING FEE $352,078 $364,316 $376,980 $387,343 $397,991 $408,932 $420,173 $431,724 $443,592 $455,786 $468,316 CONFERENCE, TRAINING & TRAVEL $4,131 $4,275 $4,423 $4,545 $4,670 $4,798 $4,930 $5,066 $5,205 $5,348 $5,495 Category Utility FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 Principal Sewer $0 $0 $0 $0 $0 $0 $0 $0 $0 $0 $0
Interest Sewer $1,548,785 $1,464,595 $1,384,616 $1,308,635 $1,236,453 $1,167,880 $1,102,736 $1,040,850 $982,057 $926,204 $873,144 Principal Sewer $1,513,603 $1,588,628 $1,666,810 $1,737,657 $1,812,172 $1,832,372 $1,914,811 $1,991,627 $2,077,818 $1,528,588 $1,597,347 Interest Sewer $615,851 $581,909 $542,947 $500,112 $455,026 $406,192 $354,684 $301,851 $245,812 $199,034 $161,479 Year Issued Utility FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 FY 2030 FY 2031 FY 2032 FY 2033 FY 2034 FY 2035 FY 2026 $45,450,000

5.0%
30 $45,450,000 $44,772,685 $44,084,005 $43,360,891 $42,601,621 $41,804,387 $40,967,292 $40,088,342 $39,165,445 $450,000
Principal $677,315 $688,680 $723,114 $759,270 $797,234 $837,095 $878,950 $922,897 $969,042 Interest $2,250,000 $2,238,634 $2,204,200 $2,168,045 $2,130,081 $2,090,219 $2,048,365 $2,004,417 $1,958,272

142 City of Corona – 2024 Water, Reclaimed Water, and Sewer Rate Study

CITY OF CORONA
2024 Electric Greenfield Utility
Rate Study
Final Report September 23, 2024

CITY OF CORONA
2024 ELECTRIC GREENFIELD UTILITY RATE STUDY

FINAL REPORT
Prepared for:

City of Corona
400 South Vicentia Avenue
Corona, CA 92882
Prepared by:

EES Consulting, a GDS Associates Company
16701 NE 80th St. Suite 102
Redmond, WA 98052
(425) 889-2700

September 23, 2024
Mr. Tom Moody
Director of Utilities
City of Corona
400 South Vicentia Avenue
Corona, CA 92882
Subject: 2024 Electric Greenfield Utility Rate Study
Dear Mr. Moody:

EES Consulting (EES), a GDS Associates Company,. is pleased to provide this 2024 Electric Greenfield Utility Rate Study to the City of Corona (City). This rate study includes a financial plan to determine the revenue requirements for the next five years and a comprehensive review of the City’s current rates based on the cost of service principles. This report outlines the approach, methodology, findings, and recommendations of the study. Each of the components of this study has enhanced the equitability of the rates we propose.

The proposed rates were developed utilizing the City’s customer usage data, billing records, accounting, operating and management records, capital plans, and reserve policies. Based on the City-provided data, key assumptions were made for the study using appropriate resources and our econometric and financial expertise.

It has been an absolute pleasure and honor to work with your City. We thank you, Ms. Hockett, Ms.

Kunkle, Ms. Betancourt, and Mr. Ma and all staff who helped complete this report.

Respectfully submitted,
Amber Gschwend
Managing Director EES Consulting
16701 NE 80th Street, Suite 102, Redmond, WA 98052
425.655.1042
[email protected]

City of Corona – 2024 Electric Greenfield Utility Rate Study i 1 CONTENTS
LIST OF TABLES................................................................................................................................. iii LIST OF FIGURES............................................................................................................................... iv 1 EXECUTIVE SUMMARY................................................................................................................ 1

1.1 Background ............................................................................................................................. 1

1.2 Purpose of Study ..................................................................................................................... 2

1.3 Rate Recommendations and Proposed Rates ......................................................................... 2

1.4 Current and Proposed Electric Rates....................................................................................... 2 2 METHODOLOGY ........................................................................................................................... 8

2.1 General Methodology .............................................................................................................. 8

2.2 Legal Considerations............................................................................................................... 8

2.3 Key Assumptions..................................................................................................................... 9 Escalation Factors .......................................................................................................................... 9 Customer and Sales Growth......................................................................................................... 10 Debt Service Coverage Ratios...................................................................................................... 11 3 FINANCIAL PLAN........................................................................................................................ 12

3.1 Revenues .............................................................................................................................. 12

3.2 Operating and Maintenance (O&M) Expense......................................................................... 13

3.3 Other Obligations................................................................................................................... 13 Capital Improvement Projects....................................................................................................... 13 Reserves ...................................................................................................................................... 14 Debt Service and Coverage Ratios............................................................................................... 15

3.4 Financial Plan Summary........................................................................................................ 16

3.5 Revenue Requirements ......................................................................................................... 18 4 COST OF SERVICE ANALYSIS .................................................................................................. 20

4.1 COSA Definition and General Principles................................................................................ 20

4.2 General Ratemaking Principles.............................................................................................. 21

4.3 Functionalization of Costs...................................................................................................... 22 Standard Functionalization ........................................................................................................... 22

4.4 Classification of Costs ........................................................................................................... 23 Standard Classification ................................................................................................................. 24 City of Corona Classification Method ............................................................................................ 25

4.5 Allocation of Costs................................................................................................................. 27 City of Corona Allocation Methodology ......................................................................................... 28 5 ELECTRIC RATE DESIGN .......................................................................................................... 32

5.1 Recommended Residential Rates.......................................................................................... 33

City of Corona – 2024 Electric Greenfield Utility Rate Study ii

5.2 Recommended Small Commercial (GS-1) Rates................................................................... 34

5.3 Recommended Medium Commercial (GS-2) Rates ............................................................... 35

5.4 Recommended Large Commercial (TOU-GS-3) Rates .......................................................... 36

5.5 Recommended Industrial (TOU-8) Rates............................................................................... 37

5.6 Recommended Pumping and Agriculture (TOU-PA-2) Rates................................................. 38

5.7 Recommended Lighting Rates............................................................................................... 40

5.8 Recommended Commercial Electric Vehicle Charging Rates................................................ 40 APPENDIX .......................................................................................................................................... 42

City of Corona – 2024 Electric Greenfield Utility Rate Study iii

LIST OF TABLES
Table 1. Rate Class Definitions ...............................................................................................................................3 Table 2. Proposed Revenue Adjustments FY 2024-25 to FY 2028-29 .................................................................3 Table 3. Current and Proposed Residential Rates (D)..........................................................................................4 Table 4. Current and Proposed Small General Service Rates (GS-1) .................................................................4 Table 5. Current and Proposed Medium General Service Rates (GS-2) .............................................................4 Table 6. Current and Proposed Large General Service Rates (TOU-GS-3) ........................................................5 Table 7. Current and Proposed Industrial Rates (TOU-8).....................................................................................5 Table 8. Current and Proposed Pumping and Agriculture Service Rates (TOU-PA).........................................6 Table 9. Current and Proposed Lighting Rates .....................................................................................................6 Table 10. Proposed Commercial Electric Vehicle Charging Rates .....................................................................7 Table 11. Expense Escalation Factors ................................................................................................................ 10 Table 12. Annual Meter Count FY 2023-24 to FY 2028-29.................................................................................. 11 Table 13. Annual Miscellaneous Revenue by Source, FY 2024 to FY 2029..................................................... 12 Table 14. Electric Utility Greenfield Operating Forecast, FY 2024 to FY 2029 ................................................ 13 Table 15. Operating Expenses by Expense Category, FY 2024 to FY 2029..................................................... 13 Table 16. Rate Study CIP Expenses and CIP Reserve, FY 2024 to FY 2029 .................................................... 14 Table 17. Electric Greenfield Reserve Target, FY 2024 to FY 2029 .................................................................. 14 Table 18. Electric Greenfield Utility Debt Service Coverage Ratio Calculation, FY 2024 to FY 2029 ........... 16 Table 19. Status Quo Financial Pro Forma for City of Corona Electric Greenfield, FY 2024 to FY 2029...... 17 Table 20. Proposed Financial Pro Forma for City of Corona Electric Greenfield System, FY 2024 to FY 2029................................................................................................................................................................. 18 Table 21. Revenue Requirements for City of Corona Electric Greenfield Utility, FY 2025............................. 19 Table 22. Functionalized Revenue Requirement FY 2025 ................................................................................. 23 Table 23. Functionalized Rate Base FY 2023...................................................................................................... 23 Table 24. Functionalized and Classified Revenue Requirement FY 2025........................................................ 27 Table 25. Functionalized and Classified Rate Base FY 2023 ............................................................................ 27

City of Corona – 2024 Electric Greenfield Utility Rate Study iv Table 26. Functionalized, Classified, and Allocated Rate Base FY 2023......................................................... 30 Table 27. Summary of FY 2025 Load Data .......................................................................................................... 30 Table 28. Allocated Revenue Requirement FY 2025 .......................................................................................... 31 Table 29. Total of Operating Functional Categories Allocated to Cost Components .................................... 31 Table 30. Recommended Rebalancing Proposal ............................................................................................... 32 Table 31. Residential: COSA Unit Costs, Current Rates, and Recommended FY 2025 Rates ...................... 34 Table 32. GS-1: COSA Unit Costs, Current Rates, and Recommended FY 2025 Rates ................................. 34 Table 33. GS-1: Bill Impact Example.................................................................................................................... 35 Table 34. GS-2: COSA Unit Costs, Current Rates, and Recommended FY 2025 Rates ................................. 35 Table 35. GS-2: Bill Impact Example.................................................................................................................... 36 Table 36. TOU-GS-3: COSA Unit Costs, Current Rates, and Recommended FY 2025 Rates ........................ 37 Table 37. TOU-GS-3: Bill Impact Example........................................................................................................... 37 Table 38. TOU-8: COSA Unit Costs, Current Rates, and Recommended FY 2025 Rates............................... 38 Table 39. TOU-8: Bill Impact Example ................................................................................................................. 38 Table 40. TOU-PA-2: COSA Unit Costs, Current Rates, and Recommended FY 2025 Rates......................... 39 Table 41. Lighting: Current Rates and Recommended FY 2025 Rates............................................................ 40 Table 42. EV Charging: Recommended FY 2025 Rates..................................................................................... 41

LIST OF FIGURES
Figure 1. City of Corona Electric Service Greenfield............................................................................................1 Figure 2. Electric Utility Greenfield Rate Study Process......................................................................................8 Figure 3. Electric Retail Sales (kWh) Forecast FY 2023-24 to FY 2033-34....................................................... 11 Figure 4. Electric Greenfield Cash Balances and Reserve Target with Current Rates, FY 2024 to FY 2029 15 Figure 5. Debt Service Coverage Ratio Under Current Rates, FY 2024 to FY 2029 ........................................ 16 Figure 6. EV Charging Rate Comparison with SCE ........................................................................................... 41

City of Corona – 2024 Electric Utility Greenfield Rate Study 1 1 EXECUTIVE SUMMARY

1.1 Background
The Electric Utility of the City of Corona (City) was established on April 4, 2001 by City Council Resolution No. 2001-25 in response to state-wide rolling blackouts and electric price instability. The City provides fully-bundled “Greenfield” electric service to residents and businesses within the City’s electric service area. New developments will become customers of the Corona Greenfield electric utility (Greenfield System) if they are in the City’s service area and capacity is available. The Greenfield System currently provides bundled delivery and power supply services to approximately 1,800 customers in 5 different areas of the City. The City also provides Direct Access energy procurement or “generation” services through the Direct Access Program to municipal and commercial customers within the City. The Direct Access Program is not a part of this rate study.

Figure 1 illustrates the City’s electric utility service area.

Figure 1. City of Corona Electric Service Greenfield

City of Corona – 2024 Electric Utility Greenfield Rate Study 2

1.2 Purpose of Study
The purpose of this analysis is to conduct a rate study which evaluates the City’s current rates and financial data and propose new rates, if necessary, that meet the City’s financial and strategic goals.

The primary objectives of this Study include:
• Projecting revenues and expenses for a ten-year study period • Proposing five-year revenue adjustments to fund the City’s projected financial needs • Proposing rates which do not overly impact customers
• Producing an administrative record which effectively summarizes all findings

1.3 Rate Recommendations and Proposed Rates

1.4 Current and Proposed Electric Rates
The Greenfield System services customers are based on class of service and one or more of the 12 rate schedules as provided in the City’s Electric Rates and Tariffs.1 The cost of service analysis (COSA) combines similar rate schedules for the cost allocation analysis but then develops rates for each of the current rate schedules. Table 1 describes the rate class and applicable rate schedules. 1 https://www.coronaca.gov/home/showpublisheddocument/2238/638550797549230000 Electric
 Adjusting rates annually by the recommended revenue adjustments of 4.0 percent per year.  Adjust rate levels differently across customer classes to recover each class’s unique cost of service. Effectively this realigns rates with cost of service.  Increasing the fixed proportion of rate collection.
 Including a rate category for commercial electric vehicle charging stations.  Separating the Public Benefits Charge from base rates.  Remove seasonal energy rates for non-TOU commercial classes.  Collect demand-related power supply costs throughout the year rather than just during summer peak periods.
 Increase demand rates for power supply and facilities charges based on cost of service.

City of Corona – 2024 Electric Utility Greenfield Rate Study 3 Table 1. Rate Class Definitions
Rate Class Schedule Notes
Residential D (Domestic Service) Applies to all single family and multifamily dwellings
Small General Service GS-1 Non-demand metered, < 20 kW/month Medium General Service GS-2 Demand-metered, above 20 kW and below 200 kW
Large General Service TOU-GS-3 Time of use and demand metered above 200 kW and below 500 kW
Industrial TOU-8 Time of use and demand metered above 500 kW Pumping and Agriculture PA-2, TOU-PA Demand metered service for pumping and agricultural usage (min of 70% total usage)
Lighting AL-2, TC-1, LS-3 Street lighting, outdoor lighting, and traffic control The City also provides net energy metering (NEM) and eligible renewable generation (ERG) service schedules. These services are considered in the rate study separately.

EES proposes the following rate and revenue adjustments to accomplish the City’s goals of capital and reserve funding as well as maintaining debt service coverage ratios. To maintain the proposed financial plan, the City should raise electric revenues by 4.0 percent each year of the study period. Table 2 shows the proposed revenue adjustments for the five-year rate study period.

Table 2. Proposed Revenue Adjustments FY 2024-25 to FY 2028-29 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Recommended Adjustment 4.0% 4.0% 4.0% 4.0% 4.0%
The City will implement the fiscal year rates in January of each fiscal year. Tables 3 through 10 summarize the current and proposed electric rates based on the results of this study. Rates for FY 2025 through FY 2029 are shown in the Appendix.

City of Corona – 2024 Electric Utility Greenfield Rate Study 4 Table 3. Current and Proposed Residential Rates (D)
Current Rates Recommended
FY 2025
Fixed Charge, $/month Single Family: $0.88/day
Multi-Family: $0.67/day $15.90
Energy, $/kWh
Tier 1 Baseline $0.11808 $0.10100
Tier 2 101-130% Baseline $0.13741 $0.11100
Tier 3 131-200% Baseline $0.22696 $0.21000 Tier 4 over 200% Baseline $0.32337 Public Benefits Charge $/kWh Included in Energy Rate $0.00378 Table 4. Current and Proposed Small General Service Rates (GS-1) Current Rates Recommended
FY 2025
Fixed Charge, $/month Single Phase: $12.99
Three Phase: $3.16
Single Phase: $20.97
Three Phase: $3.16
Energy, $/kWh
Summer $0.17280 $0.15500
Winter $0.16872 $0.15500
Public Benefits Charge, $/kWh Included in Energy Rate $0.00378 Total Variable Rate $0.17024 $0.15878
Table 5. Current and Proposed Medium General Service Rates (GS-2) Current Rates Recommended FY
2025
Fixed Charge, $/month $71.50 $35.13
Demand, $/kW
Power Supply Summer Peak:(1) $20.67 Peak: (2) $8.27
Distribution Facilities: $7.35 Facilities: $15.74
Energy, $/kWh
Summer $0.09648 $0.05905
Winter $0.08738 $0.05905
Public Benefits Charge Included in Energy Rate $0.00378 Total Variable Rate $0.09087 $0.06283

1. Summer Peak is from 4 pm to 9 pm on weekdays during summer months

2. Peak is from 4 pm to 9 pm year-round

City of Corona – 2024 Electric Utility Greenfield Rate Study 5 Table 6. Current and Proposed Large General Service Rates (TOU-GS-3)

1. Summer Peak is from 4 pm to 9 pm on weekdays during summer months, except holidays

2. Mid-Peak is 4 pm to 9 pm on summer weekends except holidays

3. Peak is from 4 pm to 9 pm year-round
Table 7. Current and Proposed Industrial Rates (TOU-8)
Current Rates Recommended
FY 2025
Fixed Charge, $/month $346.00 $76.97
Demand, $/kW
Power Supply Summer Peak: (1) $16.91
Mid-Peak: (2) $5.71
Peak: (3) $8.31
Distribution Facilities: $8.31 Facilities: $15.06
Energy, $/kWh
Summer On-Peak $0.12675 $0.09630
Summer Mid-Peak $0.10299 $0.07319
Summer Off-Peak $0.07184 $0.05200
Winter Mid-Peak $0.10538 $0.07986
Winter Off-Peak $0.07509 $0.05200
Power Factor Adjustment, $/kVa $0.18 $0.18
Public Benefits Charge, $/kWh Included in Energy Rate $0.00378

1. Summer Peak is from 4 pm to 9 pm on weekdays during summer months, except holidays

2. Mid-Peak is 4 pm to 9 pm on summer weekends except holidays

3. Peak is from 4 pm to 9 pm pm year-round
Current Rates Recommended FY
2025
Fixed Charge, $/month $277.25 $49.30
Demand, $/kW
Power Supply Summer Peak:(1) $18.16
Mid-Peak:(2) $6.23
Peak:(3) $8.29
Distribution Facilities: $7.62 Facilities: $17.51
Energy, $/kWh
Summer On-Peak $0.13561 $0.09620
Summer Mid-Peak $0.11027 $0.07280
Summer Off-Peak $0.07706 $0.05200
Winter Mid-Peak $0.11282 $0.07986
Winter Off-Peak $0.08052 $0.05200
Power Factor Adjustment, $/kVa $0.18 $0.18
Public Benefits Charge, $/kWh Included in Energy Rate $0.00378

City of Corona – 2024 Electric Utility Greenfield Rate Study 6 Table 8. Current and Proposed Pumping and Agriculture Service Rates (TOU-PA) Current Rates January 2025
Proposed
July 2025
Proposed
January 2026
Proposed
Fixed Charge, $/month $63.25 $19.14 $19.14 $20.86
Demand, $/kW
Power Supply Summer
Peak:(1) $10.85
Peak: (2) $6.00 Peak: $12.00 Peak: $12.98
Distribution Facilities: $3.85 Facilities: $8.00 Facilities: $10.00 Facilities: $21.55 Energy, $/kWh
Summer On-Peak $0.13064 $0.10361 $0.10361 $0.09444
Summer Mid-Peak $0.10929 $0.07874 $0.07874 $0.07178
Summer Off-Peak $0.05226 $0.05595 $0.05595 $0.05100
Winter Mid-Peak $0.12255 $0.08592 $0.08592 $0.07832
Winter Off-Peak $0.05226 $0.05595 $0.05595 $0.05100
Power Factor Adjustment, $/kVa $0.18 $0.18 $0.18 $0.18720 Public Benefits Charge $/kWh Included in
Energy Rate
$0.00378 $0.00378 $0.00405

1. Summer Peak is from 4 pm to 9 pm on weekdays during summer months, except holidays

2. Peak is from 4 pm to 9 pm year-round
Table 9. Current and Proposed Lighting Rates
Current Rates Proposed FY 2025
Outdoor Area Lighting (AL-2)
Energy Charge, $/kWh $0.08224 $0.11678
Public Benefits Charge $/kWh Included in Energy Rate $0.00378 Customer Charge, $/month $7.00 $10.26
Street Lighting (LS-3)
Energy Charge, $/kWh $0.08224 $0.11678
Public Benefits Charge $/kWh Included in Energy Rate $0.00378 Customer Charge, $/month $7.00 $10.26
Traffic Control (TC-1)
Energy Charge, $/kWh $0.11407 $0.16345
Public Benefits Charge $/kWh Included in Energy Rate $0.00378 Customer Charge, $/month $9.49 $13.91
Three Phase, $/month $3.16 $4.64

City of Corona – 2024 Electric Utility Greenfield Rate Study 7 Table 10. Proposed Commercial Electric Vehicle Charging Rates Recommended FY 2025 Rates
Fixed Charge, $/month $76.97
Demand (Facilities), $/kW $15.06
Energy, $/kWh
On-Peak 4-9 pm $0.19710
Off-Peak All Other Hours $0.06570
Power Factor Adjustment, $/kVa $0.18
Public Benefits Charge $/kWh $0.00378

City of Corona – 2024 Electric Utility Greenfield Rate Study 8 2 METHODOLOGY

2.1 General Methodology
The Greenfield System cost of service analysis and rate design studies are based on industry best practices. Figure 2 presents the steps taken to develop the City’s proposed rates.

Figure 2. Electric Utility Greenfield Rate Study Process • Growth Projection: Project customer growth for the ten-year study period, FY 2023-2024 through FY 2033-34, using the City’s forecast growth data. Forecast revenues for the study period are based on the projected customer growth and current rate levels. • Financial Planning and Revenue Requirements: Develop a ten-year financial plan based on the projected revenues and annual costs which include both operating and capital expenses. The City’s target reserve level should also be considered as part of the financial planning. Based on the financial planning, revenue requirements are determined for each year of the study period. • Cost of Service: Evaluate the customer classifications and allocate costs based on their service requirements.
• Rate Design: Design rates to equitably recover the rate revenue requirements from each customer.

2.2 Legal Considerations
This section describes the legal framework considered in the development of the recommended rates to ensure that the calculated cost of service rates provide a fair and equitable allocation of costs to each customer class.

California Constitution‐Article XIII C (Proposition 26) California voters approved Proposition 26 on November 2, 2010. Proposition 26 amended Article XIII C of the State Constitution to expand the definition of “tax” to include “any levy, charge, or exaction of any Growth Projection
Financial Planning
and Revenue
Requirements
Cost of Service Rate Design

City of Corona – 2024 Electric Utility Greenfield Rate Study 9 kind imposed by a local government” with listed exceptions. By means of these exceptions, Article XIII C classifies several types of charges, in addition to property-related charges, that are not taxes, such as charges for specific services or benefits, regulatory charges and penalties.

Article XIII C’s definition of “tax” lists the following exceptions: (1) a charge imposed for a specific benefit conferred or privilege granted directly to the payer that is not provided to those not charged, and which does not exceed the reasonable costs to the local government of conferring the benefit or granting the privilege; (2) a charge imposed for a specific government service or product provided directly to the payer that is not provided to those not charged, and which does not exceed the reasonable costs to the local government of providing the service or product; (3) a charge imposed for the reasonable regulatory costs to a local government for issuing licenses and permits, performing investigations, inspections, and audits, enforcing agricultural marketing orders, and the administrative enforcement and adjudication thereof; (4) a charge imposed for entrance to or use of local government property, or the purchase, rental, or lease of local government property; (5) a fine, penalty, or other monetary charge imposed by the judicial branch of government or a local government, as a result of a violation of law; (6) a charge imposed as a condition of property development; and (7) assessments and property-related fees imposed in accordance with the provisions of Article XIII D.

Proposition 26 also provides that the local government bears the burden of proving by a preponderance of the evidence that a levy, charge, or other exaction is not a tax, that the amount is no more than necessary to cover the reasonable costs of the governmental activity, and that the manner in which those costs are allocated to a payer bear a fair or reasonable relationship to the payer’s burdens on, or benefits received from, the governmental activity. Like the proportionality requirements of Article XIII D, assessment of rates under these requirements, if applicable, would be supported by the cost of service approach.

2.3 Key Assumptions
A base year FY 2024-25 was selected for which budgetary costs are to be analyzed and rates to be established for this study. The financial plan was built for the next ten years, including the five-year study period FY 2025-26 through FY 2029-30 with a detailed revenue adjustment plan. The City’s fiscal year starts on July 1 and ends on June 30.

Escalation Factors
The financial plan was built based on an assumption in the projected escalation of revenues and expenses associated with both operations and maintenance (O&M) and capital improvement projects (CIPs). Bureau of Labor Statistics (BLS) Los Angeles-Long Beach-Anaheim Consumer Price Index (CPI), Federal Reserve Bank of St. Louis (FRED) Economic Research Division, Quarterly Census of

City of Corona – 2024 Electric Utility Greenfield Rate Study 10 Employment and Wages (QCEW), and Engineering News Record (ENR) Building Cost Index (BCI).

Escalation factors used in this study are shown in Table 11. The Services and supplies escalator is based on the 3-year average of BLS CPI for all items through April 2024. This time period was selected to reflect the ongoing inflation observed in the electric utility industry. Cost drivers for electric utility operation and maintenance costs are largely based on the cost of distribution facilities. The Handy-Whitman Index (HWI)2
is a cost index frequently used in the electric utility industry. The HWI for electric distribution plant has increased by an average of 25% between the two most recent years published (2022-2023). While inflationary pressures have eased broadly in the economy, electric utilities are still facing high costs and long-lead times for materials and stores.

The Payroll escalation factor was provided by City staff based on historical actual costs and unknown impacts of current employee bargaining unit negotiations. The Power Supply cost escalator was taken from power supply cost forecasts provided by the City’s consultant.

Table 11. Expense Escalation Factors
Category FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Payroll 0.0% 8.0% 8.0% 4.0% 4.0%
Other Employee 0.0% 3.2% 3.2% 3.2% 3.2%
Services Supplies 0.0% 4.7% 4.7% 4.7% 4.7%
Power Supply 0.0% 5.0% 3.4% 3.4% 3.4%
CIP 0.0% 4.0% 4.0% 4.0% 4.0%
Customer and Sales Growth
Customer growth was forecast conservatively based on new service requests. It was assumed that per account electric use would remain stable over the study period with the exception of new large customers anticipated to begin taking service in 2024 and 2025. These large customers are a mix of electric vehicle (EV) charging stations, mixed commercial, multifamily dwellings, and a hotel. The City expects to add approximately 4.9 MW of load in the next 12-24 months as a result of these new customers.

There are currently approximately 1,936 electric meters connected to the Greenfield System. Figure 3 shows the annual electric customer growth for the study period. Table 12 shows the projected number of meters for all customer classes during the rate setting period. 2 Whitman, Requardt, and Associates. The Handy-Whitman Index of Public Utility Construction Costs: Trends of Construction Costs. E-6 Pacific Region.

City of Corona – 2024 Electric Utility Greenfield Rate Study 11 Figure 3. Electric Retail Sales (kWh) Forecast FY 2023-24 to FY 2033-34 Table 12. Annual Meter Count FY 2023-24 to FY 2028-29
Rate Schedule FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029 Residential (D) 1,323 1,323 1,373 1,373 1,373 1,373
GS-1 372 373 373 373 373 373
GS-2 160 160 160 160 160 160
TOU-GS-3 8 11 11 11 11 11
TOU-8 10 13 13 13 13 13
Pumping and Agriculture 2 2 2 2 2 2
Lighting 61 61 61 61 61 61
Total 1,936 1,943 1,993 1,993 1,993 1,993
The above forecasts are used in both the financial plan and the cost of service analysis.

Debt Service Coverage Ratios
The City’s debt covenants require a certain ratio of net revenue in excess of operating expenses. Debt service coverage ratios are one of the main financial plan drivers of the revenue adjustments. When calculating debt service coverage requirements, the City must maintain a net revenue of 125 percent, or a 1.25 debt service coverage ratio (DSCR) to avoid facing technical default.

City of Corona – 2024 Electric Utility Greenfield Rate Study 12 3 FINANCIAL PLAN
EES prepared a 10-year financial model for the Greenfield System to meet the City’s long-term financial goals. This section of the report details the financial forecast.

3.1 Revenues
Based on the account growth and demand projections as described in Section 3, EES forecasted retail rate revenues generated from customer rates using the current electric rates. Retail rate revenue is approximately $10.6 to $11.0 million annually. Other operating income and non-operating revenue are estimated to provide supplemental revenue each year as shown in Table 13. Surplus sales include the resale of excess power supply. AB32 revenues are the revenues earned by the utility for its allocation of carbon allowances through California’s Cap-and-Trade program. Finally, daily damages include the estimated payments the utility receives for the delayed commercial operation date for a contracted wind resource.

Table 13. Annual Miscellaneous Revenue by Source, FY 2024 to FY 2029 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Interest on Investments $601,018 $762,323 $800,439 $800,439 $800,439 $800,439 Other Interest Income $31,028 $36,627 $29,763 $24,186 $18,427 $12,481 Services to Other Funds $4,620 $4,600 $4,600 $4,600 $4,600 $4,600 Misc. Fees $132,774 $66,500 $66,500 $66,500 $66,500 $66,500 AB 32 Revenues $580,000 $870,000 $870,000 $870,000 $870,000 $870,000 Surplus Sales $774,300 $1,551,286 $2,144,126 $2,144,126 $2,144,126 $2,144,126 Daily Damages (Solar) $101,376 $462,551 $0 $0 $0 $0
Rental/Lease Income $109,000 $113,000 $118,000 $118,000 $118,000 $118,000 Total $2,334,116 $3,866,887 $4,033,428 $4,027,851 $4,022,092 $4,016,146 The system’s total revenue for the study period is estimated to be approximately $12.9 to $15.0 million annually under current rates. Table 14 shows the projected revenue flow for the study period (FY 2023- 24 – FY 2028-29) without any revenue adjustments. Projections are based on electric use and customer growth projections, as well as other operating and non-operating revenue estimates provided by City staff.

City of Corona – 2024 Electric Utility Greenfield Rate Study 13 Table 14. Electric Utility Greenfield Operating Forecast, FY 2024 to FY 2029 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Revenue from Rates $10,590,000 $10,479,000 $10,956,112 $10,956,112 $10,956,112 $10,956,112 Other Operating Revenue $1,579,870 $2,954,937 $3,085,226 $3,085,226 $3,085,226 $3,085,226 Non-Operation Revenues $754,246 $911,950 $948,202 $942,625 $936,867 $930,920 Total $12,924,116 $14,345,887 $14,989,540 $14,983,963 $14,978,204 $14,972,257

3.2 Operating and Maintenance (O&M) Expense
The majority of O&M expenses for the Greenfield System are in purchased power supply costs as shown in Table 15. These costs are increasing over time due to forecast market conditions and current contract arrangements. The systems power supply costs include all costs associated with serving retail customers including energy purchases, renewable energy, transmission and ancillary services, and capacity.

Distribution O&M are the annual ongoing costs of maintaining the electric distribution system and does not include new capital investments. Customer service and account costs are the cost of maintaining the utility billing system, meter reading, customer programs, new service requests, and staffing to take customer calls. The administrative and general expense includes the overhead needed to run the electric utility such as property insurance and staffing.

Table 15. Operating Expenses by Expense Category, FY 2024 to FY 20293 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Purchased Power Cost $8,239,397 $10,801,225 $10,872,100 $11,172,908 $11,484,571 $11,807,506 Distribution O&M $549,215 $505,074 $536,698 $570,438 $595,298 $621,248 Customer Accts & Svc $505,902 $672,638 $469,204 $479,668 $488,404 $497,533 Administration & General $1,658,408 $1,738,294 $1,815,816 $1,896,850 $1,981,506 $2,069,995 Total $10,952,922 $13,717,231 $13,693,818 $14,119,865 $14,549,778 $14,996,283

3.3 Other Obligations
Other obligations included in the financial plan are capital improvement, franchise fee, debt service obligations, and reserve contributions made from rates. These are described below.

Capital Improvement Projects
The City plans to spend an average of $500,000 a year on electric related capital expenditures during the rate setting period. While the projects planned only total an average of $500,000 per year, the electric utility department anticipates major replacements will be needed during the 10-year planning period. 3 District staff provided current year operating expenses by category, projections are based on individual line-item inflationary factors shown in Table 13.

City of Corona – 2024 Electric Utility Greenfield Rate Study 14 These replacements include investments to improve reliability and resiliency of the electrical grid4.

Therefore, in addition to the planned projects, the City’s financial plan provides revenue to build a capital savings balance. In total, the City plans for $1.6 million per year to be either used directly for capital projects or to be saved for future replacements, as shown in Table 16. The 10-year savings target of $13.1 million for future capital projects is incorporated into the financial plan.

Table 16. Rate Study CIP Expenses and CIP Reserve, FY 2024 to FY 20295 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Total CIP Expense $2,094,029 $1,600,000 $1,600,000 $1,600,000 $1,600,000 $1,600,000 CIP Projects Planned $2,094,029 $810,000 $693,323 $231,000 $253,000 $545,000 More detail on reserve balances are provided below.

Reserves
The City must maintain an appropriate reserve balance to ensure the day-to-day operation will continue during emergencies and guarantee the future stability of the system. The City’s financial goal is to build an appropriate level of cash reserves for the reserve fund included in the financial plan of this Study.

Reserve target for the Greenfield System is described below:
 Operating Reserve: Three months of operating expenses plus annual depreciation.

The reserve target at the end of the 10-year study period reaches $4.9 million. Table 17 shows the City’s reserve targets for FY 2023-24 through FY 2028-29 based on the current reserve policy. Figure 4 displays the resulting cash balances versus the reserve target under the current rates. Figure 4 demonstrates that the operating reserve is fully funded beginning FY2025.

Table 17. Electric Greenfield Reserve Target, FY 2024 to FY 2029 FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Operating Reserve $3,213,509 $3,904,527 $3,906,793 $4,015,745 $4,125,747 $4,236,870 In addition to the operating reserve, the Greenfield electric utility tracks three other reserve accounts:

1. Unrestricted – Includes all unrestricted cash including contributions held for future CIP as discussed above.
4 Replacements include gas switches, breakers, and PME replacements as well as a portion of underground cable.
5 District’s 10-year CIP budget was used for project cost, project type, and funding source

City of Corona – 2024 Electric Utility Greenfield Rate Study 15

2. Public Benefits Charge (PBC) Reserve – Contributions are made from the PBC revenues which is equal to 2.85% of retail revenues. Fund use is restricted to low-income or energy efficiency program expenditures.

3. Greenhouse Gas Reserve – Contributions are made from AB 32 auction proceeds. Fund use is restricted to renewable energy expenses.

At current rate levels and projected fund use, the aggregate reserve level decreases over the planning period. Total unrestricted cash decrease from $5.7 million to $5.5 million, of which, $5.5 million is needed to fund future CIP.

Figure 4. Electric Greenfield Cash Balances and Reserve Target with Current Rates, FY 2024 to FY 2029
Debt Service and Coverage Ratios
The City’s Greenfield system does not carry any traditional debt, however, there is a pension obligation bonds (POB) payment. This obligation is approximately $250,000 a year during the study period. Table 18 shows the DSCR under the current finances detailed in the previous tables. To derive the DSCR, net revenue is divided by the total debt service in each year.

City of Corona – 2024 Electric Utility Greenfield Rate Study 16 Table 18. Electric Greenfield Utility Debt Service Coverage Ratio Calculation, FY 2024 to FY 2029
FY 2024 FY 2025 FY 2026 FY 2027 FY 2028 FY 2029
Total Revenue $12,910,916 $14,345,887 $14,989,540 $14,983,963 $14,978,204 $14,972,257 Total Operating Expense $10,952,922 $13,717,231 $13,693,818 $14,119,865 $14,549,778 $14,996,283 Total Debt Service $229,138 $238,897 $248,271 $254,605 $260,951 $254,857 DSCR 8.55 2.63 5.22 3.39 1.64 -0.09
Under the current rates, the City will be in technical default beginning in FY 2029 as net revenues are not 125 percent greater than debt service payments. Figure 5 shows the projected debt service coverage ratios based on the current financial plan.

Figure 5. Debt Service Coverage Ratio Under Current Rates, FY 2024 to FY 2029

3.4 Financial Plan Summary
Based on the projected total revenue and necessary costs to be recovered during the study period, EES prepared a financial plan that will generate sufficient revenues for the day-to-day operation and annual CIP and make appropriate contributions to reserves. The City’s Greenfield fund currently has a projected ending cash balance of $5.7 million in FY 2024. Table 19 shows the status quo pro forma with no revenue adjustments and the resulting ending balances based on the revenues and expenses outlined in this section.