Douglas County Hazard Mitigation Plan 1694 County Rd Minden, NV 89423 2019 This page left intentionally blank TABLE OF CONTENTS Executive Summary ............................................................................................................................... ES-1 Section 1 Official Record of Adoption ........................................................................................... 1-1 1.1 Disaster Mitigation Act of 2000 .............................................................. 1-1 1.2 Adoption by the Local Governing Body and Supporting Document ...... 1-1 Section 2 Background ..................................................................................................................... 2-1 2.1 Plan Purpose and Authority ..................................................................... 2-1 2.2 Stafford Act Grant Programs ................................................................... 2-1 2.3 Plan Organization..................................................................................... 2-3 Section 3 Community Description ................................................................................................. 3-1 3.1 History, Location, and Geography ........................................................... 3-1 3.2 Government.............................................................................................. 3-2 3.3 Demographics .......................................................................................... 3-7 3.4 Land Use and Development Trends ....................................................... 3-11 Section 4 Planning Process ........................................................................................................... 4-1 4.1 Overview of Planning Process ................................................................. 4-1 4.2 Hazard Mitigation Planning Committee .................................................. 4-4 4.2.1 Formation of the Planning Committee ......................................... 4-4 4.2.2 Planning Committee Meetings & Monthly Progress ................... 4-5 4.3 Public Involvement .................................................................................. 4-6 4.4 Incorporation of Existing Plans and Other Relevant Information ........... 4-8 Section 5 Hazard Analysis .............................................................................................................. 5-1 5.1 Hazard identification and screening ......................................................... 5-2 5.2 Hazard Profile .......................................................................................... 5-6 5.2.1 Drought ........................................................................................ 5-7 5.2.2 Earthquake ................................................................................. 5-10 5.2.3 Epidemic .................................................................................... 5-24 5.2.4 Floods ......................................................................................... 5-34 5.2.5 Seiche ......................................................................................... 5-53 5.2.6 Severe Weather .......................................................................... 5-57 5.2.7 Volcanic Activity ....................................................................... 5-61 5.2.8 Wildland Fire ............................................................................. 5-65 Section 6 Vulnerability Analysis .................................................................................................... 6-1 6.1 Asset inventory ........................................................................................ 6-1 6.1.1 Population and Building Stock .................................................... 6-1 6.1.2 Critical Facilities and Infrastructure ............................................ 6-2 6.2 Methodology ............................................................................................ 6-3 TABLE OF CONTENTS 6.3 Data Limitations ....................................................................................... 6-4 6.4 Exposure Analysis ................................................................................... 6-5 6.4.1 Drought ........................................................................................ 6-8 6.4.2 Earthquakes .................................................................................. 6-8 6.4.3 Epidemics ..................................................................................... 6-8 6.4.4 Floods ........................................................................................... 6-9 6.4.5 Seiche ........................................................................................... 6-9 6.4.6 Severe Weather ............................................................................ 6-9 6.4.7 Volcanic Activity ......................................................................... 6-9 6.4.8 Wildland Fires ............................................................................ 6-10 6.5 Repetitive Loss Properties ...................................................................... 6-10 Section 7 Capability Assessment .................................................................................................. 7-1 7.1 Legal and Regulatory Capabilities ...............................................................1 7.2 Administrative and Technical Capabilities ..................................................2 7.3 Financial Capabilities ...................................................................................2 7.4 Current Mitigation Capabilities & Analysis ................................................4 Section 8 Mitigation Strategy ......................................................................................................... 8-1 8.1 Mitigation Goals and Objectives ............................................................. 8-1 8.2 Identifying Mitigation Actions ................................................................ 8-2 8.3 National Flood Insurance Program (NFIP) Compliance ....................... 8-10 8.4 Evaluating and Prioritizing Mitigation Action ...................................... 8-11 8.5 Implementing a Mitigation Action Plan ................................................ 8-12 Section 9 Plan Maintenance ........................................................................................................... 9-1 9.1 Monitoring, Evaluating, and Updating the HMP ..................................... 9-1 9.2 Implementation through Existing Planning Mechanisms ........................ 9-3 9.3 Continued Public Involvement ................................................................ 9-4 Section 10 References .................................................................................................................... 10-1 Tables and Figures Tables Table 3-1 Census Data Table 3-2 Age Data Table 3-3 Total Area in Douglas County Table 3-4 Public Land Ownership Table 3-5 Future Land Use in Douglas County Table 3-6 Land Area by Zoning District Table 3-7 Population Density Table 4-1 Plan Outline and Update Effort Table 4-2 Douglas County Hazard Mitigation Planning Committee & Participating Agencies Table 5-1 Identification and Screening of Hazards Table 5-2 Vulnerability Ratings Rubric Table 5-3 Hazards Rating Table 5-4 Recent Drought Periods Table 5-5 Historic Earthquakes in Douglas County Table 5-6 Major Late Quaternary Faults in Douglas County Table 5-7 Major Late Quaternary Faults Near Douglas County Table 5-8 Probability of Modified Mercalli Intensity Levels Occurring in Douglas County Communities Table 5-9 Historical Occurrences of Epidemics Registered in Nevada Table 5-10 Historic Floods in Douglas County Table 5-11 Carson River Transport Flows Table 5-12 Summary of Reported Fire History Table 5-13 Risk of Catastrophic Wildfire in Valley Portion of Douglas County Table 5-14 Risk of Catastrophic Wildfire in Lake Portion of Douglas County Table 5-15 Floor Area at Risk Table 6-1 Estimated Population and Building Inventory Table 6-2 Critical Facilities and Infrastructure Table 6-3 Potential Hazard Vulnerability Assessment – Population and Buildings Table 6-4 Potential Hazard Vulnerability Assessment – Critical Facilities Table 7-1 Legal and Regulatory Resources Available for Hazard Mitigation Table 7-2 Administrative and Technical Resources for Hazard Mitigation Tables and Figures Table 7-3 Financial Resources for Hazard Mitigation Table 7-4 Douglas County Local Mitigation Capability Assessment Table 8-1 Mitigation Goals Table 8-2 Mitigation Goals and Potential Actions Table 8-3 STAPLE+E Evaluation Criteria for Mitigation Actions Table 8-4 Action Plan Matrix Figures Figure 3-1 Map of Douglas County Figure 3-2 Douglas County Population Projects Figure 3-3 Douglas County Building Permits and Values Figure 5-1 Comparison of the U.S. Drought Monitor Maps of Nevada Figure 5-2 Earthquakes Recorded in Douglas County for the 1840s to 2010 Figure 5-3 Map of 1932 Cedar Mountain Earthquake Figure 5-4 Schematic Map of the Eight Largest Faults in Douglas County Figure 5-5 Earthquake Hazard Curves for Five Douglas County Communities Figure 5-6 Earthquake Peak Ground Acceleration Map for Nevada and California Figure 5-7 Earthquake-Induced Liquefaction Hazards Figure 5-8 Percentage of Visits for Influenza-like Illness Figure 5-9 Map of States Infected with the Outbreak Strain of E. coli Figure 5-10 Recent Fires in Douglas