Local Hazard Mitigation Plan for Nevada County 2011-2016 This plan incorporates the jurisdictions of Grass Valley, Nevada City, Truckee, California Department of Forestry, US Forest Service, and various special districts. 1. Table of Contents 2. Acknowledgements ......................................................................................................................................................... 4 3. Executive Overview ......................................................................................................................................................... 5 4. Introduction .................................................................................................................................................................... 5 5. County Background Information ..................................................................................................................................... 6 5.1. County Profile ......................................................................................................................................................... 6 5.2. History of County .................................................................................................................................................... 7 5.3. Population, Income and Growth Trends ................................................................................................................. 7 5.4. History of Disasters ................................................................................................................................................. 8 Table: State or Federally Declared Disasters in Nevada County 1950-2009....................................................................... 8 5.5. History of Risk Mitigation Assessments .................................................................................................................. 8 5.6. 2006 Mitigations Strategy Status ............................................................................................................................ 9 Table: 2006 Plan Update: Mitigation Action Status Summary .......................................................................................... 10 6. Planning Process ........................................................................................................................................................... 10 6.1. Local Government Participation ........................................................................................................................... 11 6.2. Public Participation ............................................................................................................................................... 11 6.3. Descriptions of Participating Jurisdictions ............................................................................................................ 12 7. Vulnerability .................................................................................................................................................................. 17 7.1. Repetitive Loss Risks ............................................................................................................................................. 17 7.2. Structures, Infrastructure(s) and Critical Facilities................................................................................................ 18 7.3. Assessing Vulnerability, Potential Losses .............................................................................................................. 19 7.4. Assessing Vulnerability, Developing Trends.......................................................................................................... 19 8. Natural Risks Assessment ............................................................................................................................................. 20 8.1. Urban Interface Wildland Fires ............................................................................................................................. 20 Statewide Fire Cause Summary Table (2006) ................................................................................................................... 22 8.2. Floods .................................................................................................................................................................... 23 8.3. Dam Failures ......................................................................................................................................................... 26 8.4. Earth Quake .......................................................................................................................................................... 27 8.5. Avalanche .............................................................................................................................................................. 27 8.6. Land Slides ............................................................................................................................................................. 28 8.7. Severe Weather (Wind, Lightning, Snow, Freezing, Heavy Rain).......................................................................... 29 8.8. Volcano ................................................................................................................................................................. 29 8.9. Land Subsidence.................................................................................................................................................... 30 8.10. Mine Related Hazards ....................................................................................................................................... 30 8.11. Agricultural Hazard ........................................................................................................................................... 31 8.12. Human Health Hazards ..................................................................................................................................... 32 8.13. Pandemic Flu ..................................................................................................................................................... 32 9. Man Made Risks Assessment ........................................................................................................................................ 33 9.1. Hazardous Materials ............................................................................................................................................. 33 9.2. Arson and Commercial Fires ................................................................................................................................. 34 Table of Commercial Centers found in Nevada County .................................................................................................... 34 Local Hazard Mitigation Plan – Nevada County Page 2 of 70 9.3. Airborne Hazards .................................................................................................................................................. 35 10. Mitigation Strategy ................................................................................................................................................... 37 10.1. Overview ........................................................................................................................................................... 37 10.2. Goals and Objectives ......................................................................................................................................... 37 10.3. Identification and Initial Characterization of Mitigation Actions ...................................................................... 38 Table: Nevada County Planning Area's Mitigation Actions ............................................................................................... 39 11. Plan Implementation and Maintenance ................................................................................................................... 40 11.1. Implementation ................................................................................................................................................ 40 11.2. Maintenance ..................................................................................................................................................... 40 12. APPENDICES .............................................................................................................................................................. 41 12.1. Identified Local Governments ........................................................................................................................... 41 12.2. Multi-Hazard Mitigation Actions - Detailed Project Descriptions ..................................................................... 42 12.3. Wildfire Mitigation Actions - Detailed Project Descriptions ............................................................................. 47 12.4. Flood Mitigation Actions - Detailed Project Descriptions ................................................................................. 52 12.5. Public Outreach Examples ................................................................................................................................. 56 12.6. MAPS ................................................................................................................................................................