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<br /> <br />Water Rate Cost-of-Service Study <br />Contents, Figures, Glossary, Acknowledgements, and Limitations <br /> <br /> <br /> <br /> <br />HF&H Consultants, LLC | Revised October 30, 2025 | Page i <br />CONTENTS <br />SECTION 1. EXECUTIVE SUMMARY .................................................... 1 <br />Background ....................................................................................... 1 <br />Revenue Requirements ....................................................................... 2 <br />Rate Structure ................................................................................... 5 <br />SECTION 2. INTRODUCTION ........................................................... 13 <br />Study Purpose ................................................................................. 13 <br />Study Process .................................................................................. 13 <br />Report Organization .......................................................................... 13 <br />SECTION 3. REVENUE REQUIREMENTS ........................................... 14 <br />Demand Projections .......................................................................... 14 <br />Revenue Requirement Assumptions and Projections .............................. 14 <br />Reserves ......................................................................................... 18 <br />Revenue Increases ........................................................................... 19 <br />Debt Coverage ................................................................................. 20 <br />Reserve Fund Balance ....................................................................... 21 <br />SECTION 4. COST-OF-SERVICE ANALYSIS ...................................... 23 <br />General Approach ............................................................................. 23 <br />Customer Classes ............................................................................. 23 <br />Current Rate Structure ...................................................................... 24 <br />Consumption Charge Modifications ..................................................... 27 <br />Cost-of-Service Allocations ................................................................ 28 <br />SECTION 5. RATE DESIGN ............................................................... 36 <br />Service Charge Design ...................................................................... 36 <br />Water Use Charge Design .................................................................. 40 <br />SECTION 6. CUSTOMER BILL IMPACTS ........................................... 47 <br />Bill Comparison ................................................................................ 47 <br />AB 755 Water Use Analysis ................................................................ 52 <br />ATTY/RESO.0109/CC RESO WATER RATES - EXHIBIT A <br />REV: 11-05-25 MI