Pitkin County Hazard Mitigation Plan 2018 2018 Pitkin County Hazard Mitigation Plan Pitkin County Hazard Mitigation Plan April 2, 2018 1 2018 Pitkin County Hazard Mitigation Plan Table of Contents Executive Summary ......................................................................................................................... 6 Chapter One: Introduction to Hazard Mitigation Planning ............................................................. 9 1.1 Purpose .................................................................................................................................. 9 1.2 Participating Jurisdictions ...................................................................................................... 9 1.3 Background and Scope .......................................................................................................... 9 1.4 Mitigation Planning Requirements ...................................................................................... 10 1.5 Grant Programs Requiring Hazard Mitigation Plans............................................................ 10 1.6 Plan Organization ................................................................................................................ 11 Chapter Two: Planning Process ..................................................................................................... 13 2.1 2017 Plan Update Process ................................................................................................... 13 2.2 Multi-Jurisdictional Participation ........................................................................................ 13 2.3 10-Step Planning Process .................................................................................................... 15 2.4 Phase One: Organize Resources .......................................................................................... 15 2.5 Phase Two: Assess Risks ...................................................................................................... 18 2.6 Phase Three: Develop the Mitigation Plan .......................................................................... 19 2.7 Phase Four: Implement the Plan and Monitor Progress ..................................................... 20 Chapter Three: Community Profile ............................................................................................... 22 3.1 Geography ........................................................................................................................... 23 3.2 Climate ................................................................................................................................. 23 3.3 History ................................................................................................................................. 23 3.4 Population ........................................................................................................................... 24 3.5 Economy .............................................................................................................................. 25 3.6 Government ........................................................................................................................ 27 3.7 Fire Protection Districts (FPDs) ............................................................................................ 28 Chapter Four: Risk Assessment ..................................................................................................... 30 4.1 Federal Disaster Declaration History for Pitkin County ....................................................... 31 4.2 Hazard Identification ........................................................................................................... 32 4.3 Hazard Profile Summary ...................................................................................................... 34 4.4 Climate Change and Natural Hazards .................................................................................. 37 4.5 Public Health Impacts of Natural Hazards ........................................................................... 41 4.6 Hazard Profile Methodology ............................................................................................... 43 2 2018 Pitkin County Hazard Mitigation Plan 4.7 Wildfires .............................................................................................................................. 44 4.8 Geologic Hazards: Landslides, Debris Flows, Mudflows and Rockfalls................................ 51 4.9 Flooding ............................................................................................................................... 57 4.10 Winter Storm ..................................................................................................................... 63 4.11 Avalanche .......................................................................................................................... 66 4.12 Drought .............................................................................................................................. 71 4.13 Lightning ............................................................................................................................ 76 4.14 Dam Failure Flooding ......................................................................................................... 79 Chapter Five: Capability Assessment............................................................................................. 85 5.1 Vulnerability Assessment Summary .................................................................................... 85 5.2 Community Asset Inventory ................................................................................................ 87 5.3 Social Vulnerability .............................................................................................................. 91 5.4 Growth and Development Trends ....................................................................................... 92 5.5 National Flood Insurance Program ...................................................................................... 93 5.6 Capability Assessment ......................................................................................................... 94 Chapter Six: Mitigation Strategy ................................................................................................. 100 6.1 Plan Goals .......................................................................................................................... 100 6.2 Incorporation of 2012 Plan Elements into Other Planning Mechanisms .......................... 100 6.3 Identification of Mitigation Action Alternatives ................................................................ 101 6.4 Prioritization of Mitigation Actions ................................................................................... 102 6.5 Completed Projects and Accomplishments Since 2012 .................................................... 103 6.6 Status of 2012 Mitigation Actions ..................................................................................... 104 6.7 2017 Mitigation Actions .................................................................................................... 107 City of Aspen and Aspen Fire Protection District (AFPD) ........................................................ 109 6.8 Mitigation Funding Sources ............................................................................................... 113 Chapter Seven: Plan Implementation and Maintenance ............................................................ 115 7.1 Formal Plan Adoption ........................................................................................................ 115 7.2 Plan Maintenance and Evaluation ..................................................................................... 115 7.3 Mitigation Actions and Other Plans and Programs ........................................................... 116 7.4 Continued Public Involvement .......................................................................................... 116 Appendices .................................................................................................................................. 118 Appendix A: Pitkin County Hazard Mitigation Planning Team ................................................ 119 Appendix B: Acronyms ............................................................................................................ 121 3 2018 Pitkin County Hazard Mitigation Plan Appendix C: References and Resources .................................................................................. 123 Appendix D: Documentation of the Planning Process ............................................................ 127 Appendix E: FEMA HAZUS Flood Maps.................................................................................... 157 Appendix F: Disaster Mitigation Act of 2000 (DMA 2000) Summary ...................................... 163 Appendix G: Formal Adoption Resolutions/Ordinances ......................................................... 166 Appendix H: FEMA Local Mitigation Plan Review Tool ........................................................... 167 Tables Table 1.1 - Participating Jurisdictions .............................................................................................. 9 Table 2.1 - Pitkin County Hazard Mitigation Planning Team ........................................................