Water Master Plan March 2017 Prepared by: Prepared for: WATER MASTER PLAN March 2017 Prepared for: Prepared by: WATER MASTER PLAN TABLE OF CONTENTS Page No. CHAPTER 1 – INTRODUCTION ................................................................................. 1-1 Introduction .................................................................................................................................. 1-1 Scope of Services ......................................................................................................................... 1-1 Acknowledgements ...................................................................................................................... 1-2 Project Staff ................................................................................................................................. 1-2 CHAPTER 2 – EXISTING SYSTEM FEATURES ................................................................ 2-1 Introduction .................................................................................................................................. 2-1 Service Area ................................................................................................................................. 2-1 Existing System Components ...................................................................................................... 2-1 Supply Sources............................................................................................................................. 2-1 Well No. 1A ........................................................................................................................... 2-2 Well No. 2 ............................................................................................................................... 2-2 Well No. 26 ............................................................................................................................. 2-3 Well No. 27A .......................................................................................................................... 2-3 Well No. 28 ............................................................................................................................. 2-3 Well No. 29 ............................................................................................................................. 2-3 Well No. 31 ............................................................................................................................. 2-3 Well No. 32 ............................................................................................................................. 2-3 Well No. 33 ............................................................................................................................. 2-3 Water Treatment Facilities ........................................................................................................... 2-4 Treatment Plant 27 .................................................................................................................. 2-4 Treatment Plant 28 .................................................................................................................. 2-5 Treatment Plant 29 .................................................................................................................. 2-5 Treatment Plant 31 .................................................................................................................. 2-5 Treatment Plant 32 .................................................................................................................. 2-5 Storage Tanks............................................................................................................................... 2-5 Decker Tank ............................................................................................................................ 2-6 Scenic Tank ............................................................................................................................. 2-6 Flat Top Tank .......................................................................................................................... 2-7 Freeway Tank.......................................................................................................................... 2-7 Airport Tank............................................................................................................................ 2-7 Lincoln Tank #1 and #2 .......................................................................................................... 2-7 Routine Storage Facility Maintenance .................................................................................... 2-7 Inactive Storage Tanks ................................................................................................................. 2-8 White Rock Tank .................................................................................................................... 2-8 Bunkerville Tank .................................................................................................................... 2-8 System Pressure Zones ................................................................................................................ 2-8 Zone 1 – Pulte Zone ................................................................................................................ 2-8 Zone 2 – North Freeway ......................................................................................................... 2-8 Zone 3 – Wolf Creek ............................................................................................................... 2-8 Zone 4 – Vista del Monte ........................................................................................................ 2-9 BOWEN COLLINS & ASSOCIATES i VIRGIN VALLEY WATER DISTRICT WATER MASTER PLAN TABLE OF CONTENTS (continued) Page No. Zone 5 – South Freeway ......................................................................................................... 2-9 Zone 6 – Bunkerville .............................................................................................................. 2-9 Zone 7 – South Virgin River ................................................................................................... 2-9 Zone 8 – Scenic/Decker .......................................................................................................... 2-9 Pressure Reducing Valves............................................................................................................ 2-9 Pipelines ..................................................................................................................................... 2-11 CHAPTER 3 – FUTURE GROWTH AND DEMAND PROJECTIONS............................. 3-1 Introduction .................................................................................................................................. 3-1 Historical Growth Trends ............................................................................................................ 3-1 Estimated Buildout Population .................................................................................................... 3-5 Projected Service Area Growth ................................................................................................... 3-7 Predicted Locations of Future Growth – 10 Year Window ....................................................... 3-11 Evaluation of Historical Water Use in the District .................................................................... 3-11 Future Annual Production Requirements................................................................................... 3-13 Seasonal Water Use .............................................................................................................. 3-13 Water Conservation .............................................................................................................. 3-13 Peak Day Production Requirements .......................................................................................... 3-14 CHAPTER 4 – WATER SUPPLY EVALUATION ............................................................... 4-1 Introduction .................................................................................................................................. 4-1 Historic Source Utilization .......................................................................................................... 4-1 VVWD Water Rights Summary .................................................................................................. 4-2 Evaluation of Supply Capacity .................................................................................................... 4-5 Annual Supply Evaluation ........................................................................................................... 4-5 Peak Day Supply Evaluation ....................................................................................................... 4-7 Existing Demand Evaluation .................................................................................................. 4-7 Existing Peak Treatment Capacity .......................................................................................... 4-9 Future Source Evaluation ...................................................................................................... 4-10 Average Day Demand with Largest Source Offline .................................................................