Pre-Disaster Mitigation Plan Update Pitkin County, City of Aspen, Town of Snowmass Village, Town of Basalt
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Pre-Disaster Mitigation Plan Update Pitkin County, City of Aspen, Town of Snowmass Village, Town of Basalt, Aspen Fire Protection District, Snowmass-Wildcat Fire Protection District, Basalt & Rural Fire Protection District, Carbondale & Rural Fire Protection District January 4, 2012 Pitkin County Pre-Disaster Mitigation Plan Update Participating Jurisdictions: Pitkin County City of Aspen Town of Snowmass Village Town of Basalt Aspen Fire Protection District Snowmass-Wildcat Fire Protection District Basalt & Rural Fire Protection District Carbondale & Rural Fire Protection District 04 January 2012 Emergency Management Pitkin County Sheriff's Office 506 E Main Street, Garden Level Aspen, CO 81611 Telephone: 970.920.5234 Pitkin County Pre- Disaster Mitigation Plan Disclaimer: This plan has been specifically prepared for planning purposes only. The figures and specifications contained herein are not suitable for individual property analyses or budgeting purposes. Mapping and analyses were conducted using data from others and were not technically verified for accuracy. Modeling software used for this plan is limited to planning-level analyses. ii Pitkin County Pre- Disaster Mitigation Plan Acknowledgements Pitkin County Emergency Management x Tom Grady, Pitkin County Emergency Manager x Valerie MacDonald, Pitkin Emergency Management Administrator Aspen/Pitkin County Public Safety Council x Pitkin County Board of Commissioners x Pitkin County Sheriff’s Office x Pitkin County Combined Communications x Pitkin County Airport x Aspen Ambulance District x City of Aspen x Aspen Police Department x Aspen Fire Protection District x Basalt Police Department x Basalt & Rural Fire Protection District x Carbondale & Rural Fire Protection District x Mountain Rescue Aspen x Snowmass Village Police Department x Snowmass-Wildcat Fire Protection District x Aspen Valley Hospital URS Corporation x David Cooper, Project Manager x Jean Sanson, Senior Planner x Jennifer Orozco, Senior Planner x Rich Chamberlain, HAZUS-MH/GIS x Jason Campbell, GIS/Mapping x Kimberly Pirri, Floodplain Manager, Mitigation Engineer iii Pitkin County Pre- Disaster Mitigation Plan Table of Contents 1.0 Introduction to Mitigation Planning ...................................................................................................... 1-1 1.1. Plan Purpose and Participating Jurisdictions ...................................................................... 1-1 1.2. Mitigation Planning Requirements ...................................................................................... 1-2 1.3. Grant Programs Requiring Hazard Plans ........................................................................... 1-3 1.4. Plan Organization .............................................................................................................. 1-5 2.0 Planning Process..................................................................................................................................... 2-1 2.1. Pre-Disaster Mitigation Workshops .................................................................................... 2-1 2.2. 10-Step Planning Process .................................................................................................. 2-2 3.0 Community Profile.................................................................................................................................. 3-1 3.1. Location, Geography, and Climate ..................................................................................... 3-1 3.2. History ............................................................................................................................... 3-3 3.3. Population ......................................................................................................................... 3-4 3.4. Economy ........................................................................................................................... 3-5 3.5. Government ....................................................................................................................... 3-6 3.6. Fire Protection Districts ...................................................................................................... 3-8 4.0 Risk Assessment...................................................................................................................................... 4-1 4.1. Hazard Identification .......................................................................................................... 4-1 4.2. Hazard Profiles and Vulnerability ....................................................................................... 4-5 4.3. Wildfire – Prioritized Hazard ............................................................................................... 4-8 4.4. Winter Storms – Prioritized Hazard .................................................................................. 4-14 4.5. Landslide/Rockslide/Rock Fall – Prioritized Hazard .......................................................... 4-18 4.6. Seasonal/Flash Flooding – Prioritized Hazard .................................................................. 4-22 4.7. Avalanche – Other Hazard ............................................................................................... 4-37 4.8. Drought – Other Hazard ................................................................................................... 4-41 4.9. Lightning – Other Hazard ................................................................................................. 4-45 4.10. Windstorms/Tornados – Other Hazard ............................................................................. 4-48 4.11. Earthquake – Other Hazard ............................................................................................. 4-50 4.12. Hazard Profile Summary .................................................................................................. 4-57 5.0 Capability Assessment ............................................................................................................................ 5-1 5.1. Community Asset Inventory ............................................................................................... 5-1 iv Pitkin County Pre- Disaster Mitigation Plan 5.2. Social Vulnerability ............................................................................................................ 5-7 5.3. Land Use and Development Trends ................................................................................... 5-8 5.4. Capability Summary ......................................................................................................... 5-10 6.0 Mitigation Strategy ................................................................................................................................ 6-1 6.1. Plan Strategy Statements, Goals, and Objectives............................................................... 6-1 6.2. Identification of Mitigation Action Alternatives ..................................................................... 6-3 6.3. Implementation of Mitigation Actions .................................................................................. 6-4 7.0 Plan Implementation and Maintenance ................................................................................................ 7-1 7.1. Monitoring, Evaluating, and Updating the Plan ................................................................... 7-1 7.2. Incorporation into Existing Planning Mechanisms ............................................................... 7-3 7.3. Continued Public Involvement ............................................................................................ 7-3 v Pitkin County Pre- Disaster Mitigation Plan Appendices Appendix A: Plan Review Crosswalk Appendix B: Planning Process Documentation Appendix C: Mitigation Action Evaluation Appendix D: Plan Maintenance Forms Appendix E: References vi Pitkin County Pre- Disaster Mitigation Plan Figures Figure 4-1: Colorado Avalanche Fatalities by County, 1950-2010 ....................................................... 4-39 Figure 4-2: Colorado Drought Conditions August 27, 2002 – Extreme Drought ................................... 4-42 Figure 4-3: Colorado Drought Conditions August 25, 2009 – No Drought Conditions .......................... 4-43 Figure 4-4: Lightning Fatalities by State, 2001-2010 ........................................................................... 4-47 Figure 4-5: Pitkin County Excerpt from Colorado’s Earthquake and Fault Map ................................... 4-52 Figure 4-6: Probability of 5.0 or Greater Earthquake in the Next 150 Years ........................................ 4-54 Figure 4-7: Colorado Seismic Hazard Map—10% Probability of Exceedance in 50 Years ................... 4-54 Figure 5-1: Social Vulnerability by County Compared with the Nation ................................................... 5-8 Figure 5-2: City of Aspen/Pitkin County Urban Growth Boundary ....................................................... 5-12 Figure 6-1: STAPLEE Criteria Used for Prioritization of Mitigation Actions ............................................ 6-4 vii Pitkin County Pre- Disaster Mitigation Plan Tables Table 2-1: 10-Step Planning Process Used to Develop the Plan........................................................... 2-2 Table 2-2: Pitkin County Pre-Disaster Mitigation Planning Workshops .................................................. 2-3 Table 2-3: Workshop Participants .......................................................................................................