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2025 Hazard Mitigation Plan <br />Kittitas County, Washington <br /> <br /> <br />Table of Contents v <br />Table 4-1. Kittitas County Hazards ................................................................................................ 55 <br />Table 4-2. State and Federal Disaster Declarations for Kittitas County .......................................... 56 <br />Table 4-3. Probability of Occurrence .............................................................................................. 58 <br />Table 4-4. Extent/Intensity Factor .................................................................................................. 58 <br />Table 4-5. Catastrophic Factor ...................................................................................................... 59 <br />Table 4-6. Population Exposure Factor .......................................................................................... 59 <br />Table 4-7. Property Exposed Factor .............................................................................................. 59 <br />Table 4-8. Changes in Development Factor ................................................................................... 60 <br />Table 4-9. Population and Life Safety Factor ................................................................................. 60 <br />Table 4-10. Underserved/Equity Factor ........................................................................................... 61 <br />Table 4-11. Property Damage Factor............................................................................................... 61 <br />Table 4-12. Economic Factor ........................................................................................................... 62 <br />Table 4-13. Environmental Factor .................................................................................................... 62 <br />Table 4-14. Essential Operations Factor .......................................................................................... 62 <br />Table 4-15. Future Development Factor .......................................................................................... 63 <br />Table 4-16. Climate Change Factor ................................................................................................. 63 <br />Table 4-17. Risk Index Score for Kittitas County (FEMA National Risk Index) ................................. 64 <br />Table 4-18. Expected Annual Loss for Kittitas County (FEMA National Risk Index) ......................... 65 <br />Table 4-19. Social Vulnerability for Kittitas County (FEMA National Risk Index) .............................. 65 <br />Table 4-20. Community Resilience for Kittitas County (FEMA National Risk Index) ......................... 66 <br />Table 4-21. 2025 Hazard Risk Score for Kittitas County .................................................................. 67 <br />Table 4-22. Avalanche Types .......................................................................................................... 70 <br />Table 4-23. North American Public Avalanche Danger Scale .......................................................... 72 <br />Table 4-24. Northwest Avalanche Center Avalanche Advisories ...................................................... 73 <br />Table 4-25. Avalanche Annualized Frequency (FEMA National Risk Index) .................................... 73 <br />Table 4-26. Avalanche Past Events ................................................................................................. 74 <br />Table 4-27. Avalanche Expected Annual Loss (FEMA National Risk Index) .................................... 78 <br />Table 4-28. Avalanche Risk Index (FEMA National Risk Index) ....................................................... 78 <br />Table 4-29. Avalanche Total Risk Score .......................................................................................... 79 <br />Table 4-30. Dam Failure Types80F .................................................................................................. 80 <br />Table 4-31. High Hazard Dams in Kittitas County ............................................................................ 82 <br />Table 4-32. Additional Dams in Kittitas County ................................................................................ 82 <br />Table 4-33. Kittitas County High Hazard Dams with DSO Hazard Classification and Population at Risk <br /> ..................................................................................................................................... 83 <br />Table 4-34. Levees in Kittitas County .............................................................................................. 87 <br />Table 4-35. USACE Dam Hazard Categories .................................................................................. 89 <br />Table 4-36. USACE Levee Safety Action Classification (LSAC)91F ................................................. 90 <br />Table 4-37. 25-Year Precipitation Projections for Kittitas County ..................................................... 93 <br />Table 4-38. Future Climate Indicators for Kittitas County ................................................................. 94 <br />Table 4-39. Dam and Levee Failure Total Risk Score ...................................................................... 95 <br />Table 4-40. Types of Drought .......................................................................................................... 96 <br />Table 4-41. Palmer Drought Severity Index ..................................................................................... 97 <br />Table 4-42. U.S. Drought Monitor Classification .............................................................................. 99 <br />Table 4-43. Drought Annualized Frequency for Kittitas County (FEMA National Risk Index) ......... 101 <br />Table 4-44. Drought Past Events ................................................................................................... 102 <br />Table 4-45. 25-Year Climate Projections for Kittitas County .......................................................... 104 <br />Table 4-46. Future Climate Indicators for Kittitas County ............................................................... 105 <br />Table 4-47. Drought Expected Annual Loss (FEMA National Risk Index) ...................................... 105 <br />Table 4-48. Drought Risk Index (FEMA National Risk Index) ......................................................... 106 <br />Table 4-49. Drought Total Risk Score ............................................................................................ 106