YUMA COUNTY MULTI- JURISDICTIONAL HAZARD MITIGATION PLAN March 2019 YUMA COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN 2019 TABLE OF CONTENTS SECTION 1: JURISDICTIONAL ADOPTION AND FEMA APPROVAL...................................................... 6 1.1 DMA 2000 Requirements ............................................................................................................................ 6 1.1.1 General Requirements............................................................................................................................. 6 1.1.2 Tribal Government Assurances ............................................................................................................. 6 1.2 Official Record of Adoption........................................................................................................................ 6 SECTION 2: INTRODUCTION .............................................................................................................. 8 2.1 Plan History..................................................................................................................................................... 8 2.2 Plan Purpose and Authority ....................................................................................................................... 8 2.3 General Plan Description............................................................................................................................. 8 SECTION 3: COMMUNITY DESCRIPTIONS .......................................................................................... 9 3.1 County Overview ........................................................................................................................................... 9 3.1.1 History & Geography .............................................................................................................................. 9 3.1.2 Climate..................................................................................................................................................... 13 3.1.3 Population ............................................................................................................................................... 15 3.1.4 Economy.................................................................................................................................................. 15 3.2 Jurisdictional Overviews ...........................................................................................................................20 3.2.1 Cocopah Indian Tribe............................................................................................................................ 20 3.2.2 San Luis ................................................................................................................................................... 21 3.2.3 Somerton ................................................................................................................................................. 23 3.2.4 Wellton .................................................................................................................................................... 26 3.2.5 Yuma........................................................................................................................................................ 28 SECTION 4: PLANNING PROCESS ..................................................................................................... 31 4.1 Planning Process Description ...................................................................................................................31 4.2 Previous Planning Process Assessment..................................................................................................31 4.3 Primary Point of Contact ..........................................................................................................................31 4.4 Planning Team..............................................................................................................................................31 4.4.1 Planning Team Assembly ..................................................................................................................... 32 4.4.2 Planning Team Activities ..................................................................................................................... 33 4.4.3 Agency/Organizational Participation ................................................................................................. 34 4.5 Public Involvement......................................................................................................................................34 4.6 Reference Documents and Technical Resources .................................................................................37 4.6.1 Program Integration .......................................................................................................................................... 39 SECTION 5: RISK ASSESSMENT ....................................................................................................... 40 5.1 Hazard Identification and Screening .....................................................................................................40 5.2 Vulnerability Analysis Methodology ......................................................................................................41 5.2.1 General..................................................................................................................................................... 41 5.2.2 Calculated Priority Risk Index (CPRI) Evaluation .......................................................................... 41 5.2.3 Asset Inventory ...................................................................................................................................... 43 5.2.4 Loss Estimations .................................................................................................................................... 44 5.2.5 Development Changes .......................................................................................................................... 44 5.3 Hazard Risk Profiles ...................................................................................................................................44 5.3.1 Drought .................................................................................................................................................... 45 5.3.3 Extreme Heat .......................................................................................................................................... 79 5.3.4 Flooding................................................................................................................................................... 85 5.3.5 Severe Wind.......................................................................................................................................... 101 5.3.6 Wildfire.................................................................................................................................................. 113 5.4 Risk Assessment Summary .................................................................................................................... 122 Page i YUMA COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN 2019 SECTION 6: MITIGATION STRATEGY............................................................................................. 123 6.1 Hazard Mitigation Goals and Objectives ........................................................................................... 123 6.2 Capability Assessment............................................................................................................................. 123 6.2.1 Jurisdictional Capabilities .................................................................................................................. 125 6.2.2 Tribal Funding Sources....................................................................................................................... 136 6.2.3 Historical Mitigation Activities ......................................................................................................... 136 6.3 Mitigation Measures and Implementation Strategy ....................................................................... 136 6.3.1 Previous Mitigation Measures Assessment ..................................................................................... 137 SECTION 7: PLAN MAINTENANCE PROCEDURES ........................................................................... 151 7.1 Monitoring and Evaluation.................................................................................................................... 151 7.2 Plan Update ................................................................................................................................................ 151 7.3 Incorporation into Existing Planning Mechanisms ......................................................................... 152 7.4 Continued Public Involvement.............................................................................................................. 154 APPENDIX A: PREVIOUS PLAN’S MITIGATION MEASURES .............................................................. 155 APPENDIX B: PLANNING PROCESS DOCUMENTATION ................................................................... 164 TABLES TABLE 4-1: JURISDICTIONAL POINTS OF CONTACT........................................................................