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Water Rate Cost-of-Service Study Contents, Figures, Glossary, Acknowledgements, and Limitations HF&H Consultants, LLC | July 8, 2025 | Page ii FIGURES Figure 1-1. Total Revenue Requirement Projections ....................................................... 3 Figure 1-2. Projected Revenue Increases ..................................................................... 3 Figure 1-3. Projected Year-End Fund Balance ............................................................... 5 Figure 1-4. Debt Service Coverage ............................................................................. 5 Figure 1-5. Current Service Charges ........................................................................... 6 Figure 1-6. Current Fire Service Charges ..................................................................... 7 Figure 1-7. Current Water Use Charge Rates ................................................................ 8 Figure 1-8. Current and Proposed Service Charge Rates ................................................ 9 Figure 1-9. Current and Proposed Fire Service Charge Rates ........................................ 10 Figure 1-10. Current and Proposed Water Use Charge Rates ......................................... 11 Figure 1-11. Drought Rates ($/HCF) ......................................................................... 12 Figure 3-1. Five-Year Modeled Demand Projections ..................................................... 14 Figure 3-2. Projection Assumptions ........................................................................... 15 Figure 3-3. Current Annual Debt Service ................................................................... 16 Figure 3-4. Projected Capital Improvement Program ................................................... 17 Figure 3-5. Total Revenue Requirement Projections ..................................................... 18 Figure 3-6. Rate Increase Calculations ...................................................................... 20 Figure 3-7. Projected Revenue Increases ................................................................... 20 Figure 3-8. Debt Service Coverage ........................................................................... 21 Figure 3-9. Projected Year-End Fund Balance ............................................................. 22 Figure 4-1. Current Service Charges ......................................................................... 25 Figure 4-2. Current Fire Service Charges ................................................................... 26 Figure 4-3. Current Water Use Charge Rates .............................................................. 27 Figure 4-4. Allocation of Water Supply and Distribution Costs ....................................... 31 Figure 4-5. Allocation of Public and Private Fire Protection Costs ................................... 32 Figure 4-6. Revenue Requirements Summary by Function (FY 2025-26) ........................ 33 Figure 4-7. System Wide Cost Allocation Factors ......................................................... 34 Figure 4-8. Service Function Allocations .................................................................... 34 Figure 4-9. Cost-of-Service Revenue Summary ........................................................... 35 Figure 5-1. Service Charge Units of Service ............................................................... 36 Figure 5-2. Fire Service Charge Units of Service ......................................................... 37 Figure 5-3. Service Charge Unit Costs ....................................................................... 38 Figure 5-4. Proposed Monthly Service Charge Rates – FY 2025-26 ................................ 38 Figure 5-5. Current and Proposed Service Charge Rates .............................................. 39 Figure 5-6. Proposed Monthly Fire Service Charge Rates .............................................. 40 Figure 5-7. Current and Proposed Fire Service Charge Rates ........................................ 40 Figure 5-8. Annual Demand ..................................................................................... 41 Figure 5-9. Proposed Water Use Charge .................................................................... 42 Figure 5-10. Current and Proposed Water Use Charge Rates ......................................... 42 Figure 5-11. Drought Rates Calculation ..................................................................... 43 Figure 5-12. Drought Rates ..................................................................................... 44 Figure 5-13. Water Rates with Drought Rates Included ................................................ 45 Figure 6-1. Single Family Residential Bill Comparison .................................................. 47 ATTY/RESO.0109/CC RESO WATER RATES - EXHIBIT A REV: 11-05-25 MI