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CITY of COLTON Local Hazard Mitigation Plan

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CITY of COLTON Local Hazard Mitigation Plan CITY OF COLTON Local Hazard Mitigation Plan Public Review Draft September 2018 CITY OF COLTON TABLE OF CONTENTS Chapter Page Section 1. Introduction ................................................................................................................................................... 1‐1 1.1 PLAN PURPOSE .............................................................................................................................................. 1‐1 1.2 PLAN AUTHORITY ........................................................................................................................................... 1‐2 Federal Authority ............................................................................................................................. 1‐2 State Authority ................................................................................................................................. 1‐2 1.3 PLAN GOALS ................................................................................................................................................... 1‐3 1.4 UPDATES SINCE LAST PLAN ............................................................................................................................ 1‐3 1.5 PLAN PROCESS ............................................................................................................................................... 1‐3 Hazard Mitigation Planning Team .................................................................................................... 1‐4 Public Engagement ........................................................................................................................... 1‐5 Public Review Draft .......................................................................................................................... 1‐6 Plan Revision and Adoption ............................................................................................................. 1‐6 1.6 PLAN RESOURCES ........................................................................................................................................... 1‐6 Section 2. Community Profile .......................................................................................................................................... 2‐1 2.1 PHYSICAL SETTING ......................................................................................................................................... 2‐1 2.2 HISTORY ......................................................................................................................................................... 2‐1 2.3 CLIMATE ......................................................................................................................................................... 2‐5 2.4 DEMOGRAPHICS ............................................................................................................................................ 2‐5 2.5 ECONOMY AND COMMUTE PATTERNS ......................................................................................................... 2‐7 2.6 EXISTING LAND USE ....................................................................................................................................... 2‐8 2.7 DEVELOPMENT TRENDS ................................................................................................................................. 2‐9 2.8 INFRASTRUCTURE ASSESSMENT .................................................................................................................... 2‐9 Electricity .......................................................................................................................................... 2‐9 Natural Gas ....................................................................................................................................... 2‐9 Water and Wastewater .................................................................................................................. 2‐10 Transportation ............................................................................................................................... 2‐11 Section 3. Risk Assessment ............................................................................................................................................. 3‐1 3.1 HAZARD IDENTIFICATION .............................................................................................................................. 3‐1 Hazard Screening Criteria ................................................................................................................. 3‐1 Hazard Prioritization ........................................................................................................................ 3‐5 3.2 HAZARD PROFILES .......................................................................................................................................... 3‐7 Drought Profile ................................................................................................................................. 3‐7 Flood Hazard Profile ....................................................................................................................... 3‐10 Geologic Hazards ............................................................................................................................ 3‐21 Human‐Caused Hazards ................................................................................................................. 3‐26 SEISMIC Hazard Profile ................................................................................................................... 3‐32 Local Hazard Mitigation Plan | September 2018 i CITY OF COLTON Severe Weather.............................................................................................................................. 3‐47 Wildfire Hazard Profile ................................................................................................................... 3‐52 Section 4. Threat Assessment ......................................................................................................................................... 4‐1 4.1 THREAT ASSESSMENT PROCESS ..................................................................................................................... 4‐1 Key Facilities ..................................................................................................................................... 4‐1 Vulnerable Populations .................................................................................................................... 4‐5 Other Community Assets ................................................................................................................. 4‐6 4.2 THREAT PROFILES .......................................................................................................................................... 4‐6 Drought ............................................................................................................................................ 4‐6 Flooding ............................................................................................................................................ 4‐7 Geologic Hazards ............................................................................................................................ 4‐10 Human‐Caused Hazards ................................................................................................................. 4‐12 Seismic Hazards .............................................................................................................................. 4‐14 Severe Weather.............................................................................................................................. 4‐18 Wildfire ........................................................................................................................................... 4‐19 Section 5. Community Capability Assessment ............................................................................................................... 5‐22 Section 6. Mitigation Strategy ......................................................................................................................................... 6‐1 6.1 STRATEGY DEVELOPMENT PROCESS ............................................................................................................. 6‐1 Mitigation Action Foundations......................................................................................................... 6‐1 Mitigation Action Evaluation ............................................................................................................ 6‐1 Prioritization ..................................................................................................................................... 6‐3 Cost Estimates .................................................................................................................................. 6‐3 6.2 HAZARD MITIGATION ACTIONS ..................................................................................................................... 6‐3 6.3 NATIONAL FLOOD INSURANCE PROGRAM .................................................................................................. 6‐11 6.4 EXISTING MITIGATION MEASURES .............................................................................................................. 6‐12 Section 7. Plan Maintenance ..........................................................................................................................................
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