HEALDSBURG 2010 URBAN WATER MANAGEMENT PLAN City of Healdsburg Utilities Department July 2015 Prepared by GHD Inc. 2235 Mercury Way, Suite 150 Santa Rosa, CA 95407 Urban Water Management Plan 2010 City of Healdsburg TABLE OF CONTENTS SECTION 1 - PLAN PREPARATION .............................................................................................................. 1-1 1.1 Introduction .................................................................................................................................... 1-1 1.1.1 Purpose ............................................................................................................................ 1-1 1.1.2 Background....................................................................................................................... 1-1 1.1.3 Structure of the Plan ........................................................................................................ 1-2 1.1.4 Level of Planning .............................................................................................................. 1-3 1.1.5 Assumptions ..................................................................................................................... 1-3 1.2 Coordination .................................................................................................................................. 1-3 1.2.1 Agency Coordination ........................................................................................................ 1-3 1.2.2 Public Participation ........................................................................................................... 1-3 1.3 Plan Adoption, Submittal, and Implementation ............................................................................. 1-4 SECTION 2 - System Description ................................................................................................................... 2-1 2.1 Service Area Description ............................................................................................................... 2-1 2.2 Climate .......................................................................................................................................... 2-1 2.3 Service Area Population ................................................................................................................ 2-6 SECTION 3 - System Demands ..................................................................................................................... 3-1 3.1 Baselines and Targets .................................................................................................................. 3-1 3.1.1 Base Daily Per Capita Water Use .................................................................................... 3-1 3.1.2 Water Use Targets (2015, 2020) ..................................................................................... 3-4 3.2 Water Demands ............................................................................................................................ 3-6 3.2.1 Past and Current Water Deliveries .................................................................................. 3-6 3.2.2 Projected Water Deliveries............................................................................................... 3-8 3.2.3 Water Sold to Other Agencies........................................................................................ 3-10 3.2.4 Actual and Projected “Other” Water Demands .............................................................. 3-11 3.2.5 Summary of Total Water Use ......................................................................................... 3-12 3.2.6 Lower Income Water Use Projections ............................................................................ 3-12 3.3 Water Demand Projections for Retailers ..................................................................................... 3-13 3.4 Water Use Reduction Plan .......................................................................................................... 3-13 3.5 Current Plan and Economic Impacts .......................................................................................... 3-13 SECTION 4 - System Supplies ....................................................................................................................... 4-1 4.1 Current and Planned Water Supply Sources ................................................................................ 4-1 4.1.1 City Water Sources .......................................................................................................... 4-1 4.1.2 Water Rights .................................................................................................................... 4-2 4.1.3 Russian River and Dry Creek Flow .................................................................................. 4-3 4.1.4 Dry Creek Well Field ........................................................................................................ 4-4 4.1.5 Russian River Well Fields ................................................................................................ 4-5 4.1.6 Recycled Water ................................................................................................................ 4-6 4.1.7 Summary of Current and Projected Water Supplies ........................................................ 4-8 4.2 Future Water Sources ................................................................................................................... 4-8 4.2.1 Recycled Water ................................................................................................................ 4-8 4.2.2 Groundwater .................................................................................................................... 4-9 4.2.3 Groundwater Management Plan(s) .................................................................................. 4-9 4.2.4 Description of Groundwater Basin ................................................................................... 4-9 4.2.5 Sufficiency of Groundwater ............................................................................................ 4-12 4.2.6 Projected Groundwater Pumping ................................................................................... 4-13 84111468 TOC - i July 2015 Urban Water Management Plan 2010 City of Healdsburg 4.3 Transfer Opportunities ................................................................................................................ 4-13 4.4 Desalinated Water Opportunities ................................................................................................ 4-14 4.5 Recycled Water Opportunities .................................................................................................... 4-14 4.5.1 Coordination with other Agencies .................................................................................. 4-14 4.5.2 Existing Wastewater Collection, Treatment, and Reuse Systems ................................. 4-14 4.5.3 Quantification of Effluent and Recycled Water .............................................................. 4-15 4.5.4 Comparison of Previously Projected Use and Actual Use ............................................. 4-17 4.5.5 Actions to encourage recycled water use ...................................................................... 4-17 4.6 Wholesale Water Suppliers ......................................................................................................... 4-17 4.7 Future Water Projects ................................................................................................................. 4-17 SECTION 5 - Water Supply Reliability and Water Shortage Contingency Planning ...................................... 5-1 5.1 Hydrologic Reliability ..................................................................................................................... 5-1 5.2 Legal & Environmental Constraints ............................................................................................... 5-3 5.2.1 Water Rights .................................................................................................................... 5-3 5.3 Water Quality Constraints ............................................................................................................. 5-4 5.4 Supply and Demand Comparisons ............................................................................................... 5-5 5.5 Summary of Supply and Demand Analysis ................................................................................... 5-6 5.6 Water Shortage Contingency and Drought Planning .................................................................... 5-6 5.6.1 Actions in Response to Water Supply Shortages ............................................................ 5-6 5.6.2 Catastrophic Supply Interruption Plan ............................................................................. 5-7 5.6.3 Hazard Analysis ............................................................................................................... 5-7 5.6.4 Concept of Operations ..................................................................................................... 5-7 5.6.5 Prohibitions, Penalties, and Consumption Reduction ...................................................... 5-8 5.6.6 Effect on Revenues and Expenditures ........................................................................... 5-10 5.6.7 Water Shortage