MADERA INTEGRATED REGIONAL WATER MANAGEMENT PLAN PROPOSITION 1 UPDATE MAY 2019 MADERA IRWMP PROPOSITION 1 UPDATED MADERA IRWMP PROPOSITION 1 UPDATE Prepared for: Madera Regional Water Management Group. P. O. Box 1061 Coarsegold, CA 93614 Contact Person: Jeannie Habben Consultant: 2816 Park Avenue Merced, CA 95348 Contact: Garth Pecchenino, P.E. Phone: (661) 616-2600(209) 723-2066 May 2019 © Copyright by Quad Knopf, Inc. Unauthorized use prohibited. Project #180028 TABLE OF CONTENTS Executive Summary ................................................................................................................. 1-1 1.1 - Strategies .................................................................................................................................................... 1-2 Introduction ............................................................................................................................... 2-1 2.1 - Mission Statement .................................................................................................................................. 2-1 2.2 - Governance ................................................................................................................................................ 2-2 2.3 - Goals ............................................................................................................................................................. 2-2 2.4 - Accomplishments .................................................................................................................................... 2-4 2.5 - IRWMP Updates and Changes ............................................................................................................ 2-5 Region Description .................................................................................................................. 3-1 3.1 - Foothill/Mountain Region ................................................................................................................... 3-1 3.2 - Valley Region ............................................................................................................................................ 3-2 3.3 - San Joaquin River Hydrologic Region ............................................................................................. 3-5 3.3.1 - Chowchilla Subbasin ............................................................................................................ 3-5 3.3.2 - Madera Subbasin ................................................................................................................... 3-5 3.3.3 - Delta-Mendota Subbasin .................................................................................................... 3-6 3.4 - Watersheds ................................................................................................................................................ 3-6 3.5 - Land Subsidence ...................................................................................................................................... 3-8 3.5.1 - Cause of Local Land Subsidence ...................................................................................... 3-8 3.5.2 - History of Land Subsidence in Area ............................................................................... 3-8 3.5.3 - Loss of Storage Due to Subsidence ................................................................................. 3-9 3.5.4 - Recent Land Subsidence Impacts .................................................................................... 3-9 3.6 - Water Quality Problem Areas .......................................................................................................... 3-11 3.6.1 - Arsenic and Uranium ........................................................................................................ 3-11 3.6.2 - Salt and Nitrate ................................................................................................................... 3-11 3.6.3 - Central Valley Salt and Nitrate Management Plan ................................................ 3-12 3.7 - Groundwater Levels ............................................................................................................................ 3-13 3.8 - Agricultural Water Demands ........................................................................................................... 3-15 Plan Objectives .......................................................................................................................... 4-1 4.1 - New Objectives Added for Proposition 1 Update ....................................................................... 4-1 4.2 - Valley Goals ............................................................................................................................................... 4-1 4.3 - Foothill/Mountain Goals ...................................................................................................................... 4-2 4.4 - Additional Goals for Proposition 1 ................................................................................................... 4-2 4.5 - Valley Goals ............................................................................................................................................... 4-4 4.5.1 - Goal No. 1: Achieve groundwater sustainability ....................................................... 4-4 4.5.2 - Goal No. 2: Expand Stakeholder Education ................................................................. 4-7 4.5.3 - Goal No. 3: Assure groundwater quality meets drinking and irrigation water quality standards ................................................................................................................................ 4-8 Madera Regional Water Management Group May 2019 Proposition 1 Update. Page i 4.5.4 - Goal No. 4: Improve Flood Control and Protection .................................................. 4-8 4.5.5 - Goal No. 5: Improve Conservation .................................................................................. 4-9 4.6 - Foothill and Mountain Goals ............................................................................................................ 4-10 4.6.1 - Goal No. 6: Create practical, enforceable policies resulting in sustainable groundwater management .......................................................................................................... 4-10 4.6.2 - Goal No. 7: Improve Water Quality ............................................................................. 4-11 4.6.3 - Goal No. 8: Improve Watershed Management ........................................................ 4-12 4.6.4 - Goal No. 9: Expand Stakeholder Education .............................................................. 4-13 4.6.5 - Goal No. 10: Conservation.............................................................................................. 4-13 Resource Management Strategies ...................................................................................... 5-1 5.1 - New CWP Criteria for Prop 1 Update .............................................................................................. 5-1 5.2 - Update to CWP Criteria ......................................................................................................................... 5-1 5.2.1 - Climate Change ....................................................................................................................... 5-1 5.2.2 - Reducing Energy Consumption ....................................................................................... 5-1 5.2.3 - Adaptation Strategies .......................................................................................................... 5-2 Project Review Process .......................................................................................................... 6-1 6.1 - Review of New Objectives.................................................................................................................... 6-1 6.2 - Integration of Objectives ...................................................................................................................... 6-2 Plan Performance and Monitoring ..................................................................................... 7-1 7.1 - General Information ............................................................................................................................... 7-1 7.2 - Monitoring Program Parameters ...................................................................................................... 7-1 7.3 - Project Specific Impacts/Benefit Analysis..................................................................................... 7-1 7.4 - Data Management Procedures ........................................................................................................... 7-2 7.5 - Other Topics .............................................................................................................................................. 7-2 Local Land Use and Water Planning .................................................................................. 8-1 8.1 - Madera Regional Water Management Group ............................................................................... 8-1 8.2 - Local Land Use Planning Documents .............................................................................................. 8-1 8.3 - Local Water Plans ..................................................................................................................................