Lower Sacramento River/Delta North Regional Flood Management Plan July 2014 Lower Sacramento Delta North Region Regional Flood Management Plan Contents Abbreviations and Acronyms .................................................................................................... vii Executive Summary ................................................................................................................ ES-1 Introduction ........................................................................................................................................ ES-1 Plan Participants ................................................................................................................................. ES-3 FloodSAFE/CVFPP ............................................................................................................................ ES-3 Planning Process ................................................................................................................................. ES-4 Goals and Objectives ........................................................................................................ ES-4 Regional Setting ................................................................................................................ ES-5 Land use and Natural Resources ....................................................................................... ES-6 Flood Management Infrastructure..................................................................................... ES-8 Problem Definition............................................................................................................ ES-8 Regional Improvements and Prioritization ....................................................................... ES-8 Financial Plan.................................................................................................................. ES-11 Next Steps ......................................................................................................................................... ES-11 1.0 Introduction ..............................................................................................................................1 1.1 Regional Flood Management Plans .................................................................................................... 1 1.2 Plan Participants ................................................................................................................................. 4 1.2.1 West Side Coordinating Committee .............................................................................. 4 1.2.2 East Side Coordinating Committee ................................................................................ 4 1.2.3 Joint Administration Committee .................................................................................... 4 1.2.4 FloodProtect ................................................................................................................... 5 1.3 Background ......................................................................................................................................... 5 1.3.1 FloodSAFE .................................................................................................................... 5 1.3.2 Central Valley Flood Protection Plan ............................................................................ 6 1.4 Report Organization ........................................................................................................................... 6 2.0 Planning Process ......................................................................................................................8 2.1 Plan Development ............................................................................................................................... 8 2.1.1 Planning Process ............................................................................................................ 8 2.1.2 Goals and Objectives ..................................................................................................... 9 2.1.3 Focus Areas .................................................................................................................. 10 2.1.4 Deliverables ................................................................................................................. 11 2.1.5 Stakeholder Outreach ................................................................................................... 12 3.0 Regional Setting .....................................................................................................................13 3.1 Flood History in the Region ............................................................................................................. 13 3.2 Regional Characteristics ................................................................................................................... 14 3.2.1 Demographics .............................................................................................................. 14 3.2.2 Economy ...................................................................................................................... 15 3.2.3 Natural Resources ........................................................................................................ 18 3.2.4 Hydrology and Hydraulics ........................................................................................... 20 Regional Flood Management Plan i Lower Sacramento/Delta North July 2014 Regional Flood Management Plan 3.2.5 Water Quality ............................................................................................................... 23 3.2.6 Groundwater ................................................................................................................ 24 3.2.7 Recreation .................................................................................................................... 25 3.2.8 Cultural Resources ....................................................................................................... 25 3.2.9 Regulatory Setting ....................................................................................................... 26 3.2.10 Risks ........................................................................................................................... 26 3.3 Regional Partners .............................................................................................................................. 30 3.3.1 Jurisdictions ................................................................................................................. 30 3.3.2 Roles and responsibilities ............................................................................................ 32 3.4 Existing Infrastructure and Programs ............................................................................................... 39 3.4.1 Structural ...................................................................................................................... 39 3.4.2 Non-Structural.............................................................................................................. 52 3.4.3 Local Governance ........................................................................................................ 57 4.0 Problem Definition .................................................................................................................58 4.1 General Problems ............................................................................................................................. 58 4.1.1 Flood Management Infrastructure ................................................................................ 58 4.1.2 Operations and Maintenance ........................................................................................ 59 4.1.3 Environmental and Ecosystem ..................................................................................... 60 4.1.4 Agricultural Sustainability ........................................................................................... 62 4.1.5 Funding ........................................................................................................................ 63 4.1.6 Climate Change ............................................................................................................ 63 4.1.7 Institutional .................................................................................................................. 64 4.1.8 Flood Emergency Preparedness, Response, and Recovery ......................................... 65 4.2 Specific Problems ............................................................................................................................. 67 4.2.1 Urban and Urbanizing .................................................................................................. 67 4.2.2 Small Communities ...................................................................................................... 73 4.2.3 Rural ............................................................................................................................. 85 4.3 Integrated Regional Water Management Opportunities ................................................................... 97 5.0 Regional Improvements.......................................................................................................100 5.1 Solano County Improvements .......................................................................................................