CITY OF POMONA INTEGRATED WATER SUPPLY PLAN 2 011 City of Pomona Integrated Water Supply Plan Prepared by: In Association with: Thomas Harder & Co. 2011 City of Pomona Integrated Water Supply Plan Table of Contents Table of Contents Table of Contents .......................................................................................................................i List of Figures ..........................................................................................................................iii Appendices .............................................................................................................................. iv List of Abbreviations .................................................................................................................. Executive Summary ............................................................................................................ ES-1 ES-1 IWSP Goal and Objectives ................................................................................. ES-1 ES-2 IWSP Process .................................................................................................... ES-1 ES-3 IWSP Preferred Alternative ................................................................................. ES-1 ES-4 Implementation ................................................................................................... ES-3 Chapter 1 Overview ..............................................................................................................1-1 1.1 Background ...........................................................................................................1-1 1.1.1 Setting ...................................................................................................................1-1 1.1.2 Previous Studies and Plans ...................................................................................1-2 1.2 Integrated Water Supply Plan Approach ................................................................1-3 1.2.1 Goals and Objectives ............................................................................................1-3 1.2.2 Issues and Challenges ..........................................................................................1-3 1.2.3 IWSP Process .......................................................................................................1-3 Chapter 2 Baseline Assessment ..........................................................................................2-1 2.1 Demand Assessment ............................................................................................2-1 2.1.1 Historical Demand .................................................................................................2-1 2.1.2 Demand Forecast ..................................................................................................2-3 2.2 Supply Assessment ...............................................................................................2-5 2.2.1 Supply Sources .....................................................................................................2-6 2.2.2 Facilities Assessment ..........................................................................................2- 18 2.2.3 Water Quality and Treatment Assessment...........................................................2- 27 2.3 Supply and Demand Comparison ........................................................................2- 33 Chapter 3 Options .................................................................................................................3-1 3.1 Options Identification and Screening .....................................................................3-1 3.1.1 Initial Options List ..................................................................................................3-1 3.1.2 Screening Process ................................................................................................3-1 3.2 Feasible Options....................................................................................................3-3 3.2.1 Groundwater ..........................................................................................................3-4 3.2.2 Local Surface Water ..............................................................................................3-5 3.2.3 Imported Water ......................................................................................................3-6 3.2.4 Recycled Water .....................................................................................................3-6 3.2.5 Conservation .........................................................................................................3-8 Chapter 4 Alternative Development and Evaluation ...........................................................4-1 4.1 Alternative Development ........................................................................................4-1 4.1.1 Initial Alternatives Development .............................................................................4-1 4.1.2 Initial Alternatives and Modifications ......................................................................4-3 4.2 Final Alternative Descriptions ................................................................................4-4 4.2.1 Overall Assumptions ..............................................................................................4-5 4.2.2 No Pedley 2 Alternative .........................................................................................4-7 4.2.3 Same Pedley 4 Alternative ....................................................................................4-8 4.2.4 Mid Pedley 5 Alternative ......................................................................................4- 10 4.2.5 Big Pedley 7 Alternative .......................................................................................4- 11 2011 i City of Pomona Integrated Water Supply Plan Table of Contents 4.2.6 Regional Supplies ................................................................................................4- 13 4.3 Alternative Evaluation ..........................................................................................4- 16 4.3.1 Evaluation Criteria ...............................................................................................4- 17 4.3.2 Reliability ................................................................... .......................................... ...4-17 4.3.3 Cost .....................................................................................................................4- 21 4.3.4 Potential Funding................................................................................................. 4-22 4.3.5 Ability to Implement .............................................................................................4- 23 4.3.6 Independence ......................................................................................................4- 23 4.3.7 Adaptability ..........................................................................................................4- 24 4.3.8 Environmental .....................................................................................................4- 24 4.3.9 Evaluation Summary ...........................................................................................4- 25 4.4 Alternative Comparison .......................................................................................4- 26 4.4.1 No Pedley 2 versus Same Pedley 4.....................................................................4- 27 4.4.2 Same Pedley 4 versus Mid Pedley 5 ...................................................................4- 27 4.4.3 Mid Pedley 5 versus Big Pedley 7 .......................................................................4- 28 Chapter 5 Preferred Alternative ...........................................................................................5-1 5.1 Alternative Description ...........................................................................................5-1 5.1.1 Groundwater ..........................................................................................................5-1 5.1.2 Local Surface Water ..............................................................................................5-2 5.1.3 Imported Water ......................................................................................................5-2 5.1.4 Recycled Water .....................................................................................................5-3 5.1.5 Conservation .........................................................................................................5-4 5.2 Schedule of Implementation ..................................................................................5-4 5.3 Implementation Yield and Costs ............................................................................5-6 5.3.1 WEAP Modeling ....................................................................................................5-6 5.3.2 Yield and Reliability ...............................................................................................5-6 5.4 Baseline Comparison ..........................................................................................5- 11 5.5 Adaptive Management Strategy ...........................................................................5- 12 5.6 Potential Funding and Financing .........................................................................5- 13 5.6.1