Multi-Hazard Mitigation Plan Clark County, Indiana
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Multi-Hazard Mitigation Plan Clark County October 2015 Clark County Multi-Hazard Mitigation Plan Updated: October 2015 Multi-Hazard Mitigation Plan Clark County, Indiana Original Adoption Date: 2008 Updated: 2015 Primary Point of Contact: Les Kavanaugh, Director Clark County EMA 110 North Indiana Avenue Sellersburg, IN 47172 Telephone: 812-246-5538 Fax: 812.246.5539 [email protected] Prepared by: River Hills EDD & RPC 300 Spring Street, Suite 2A Jeffersonville, IN 47130 (812) 288-4624 And 1200 Waterway Blvd Indianapolis, IN 46202 www.polis.iupui.edu i Clark County Multi-Hazard Mitigation Plan Updated: October 2015 Acknowledgments Clark County’s multi-hazard mitigation plan was developed in 2008 and updated in 2015 by The Polis Center at Indiana University Purdue University-Indianapolis (IUPUI). The Clark County Emergency Management Agency would like to thank The Polis Center, River Hills Economic Development District and Regional Planning Commission (River Hills EDD & RPC), and the Clark County Multi-Hazard Mitigation planning team for their contributions and assistance in development of the 2015 Clark County multi- hazard mitigation plan update. Through the combined efforts, input and support of these organizations, Clark County continues to build its capacity to prevent, protect against, respond to, and recover from disasters. ii Clark County Multi-Hazard Mitigation Plan Updated: October 2015 Acronyms AEGL – Acute Exposure Guideline Levels ALOHA – Areal Locations of Hazardous Atmospheres BFE – Base Flood Elevation CAMEO – Computer-Aided Management of Emergency Operations CAPI – Community Action Potential Index CDP – Census Designated Place CEMP – Comprehensive Emergency Management Plan CRS – Community Rating System DEM – Digital Elevation Model DFIRM – Digital Flood Insurance Rate Map DHS – Department of Homeland Security DMA – Disaster Mitigation Act EAP – Emergency Action Plan EMA – Emergency Management Agency EPA – Environmental Protection Agency FEMA – Federal Emergency Management Agency FIRM – Flood Insurance Rate Maps GIS – Geographic Information System HazMat – Hazardous Materials Hazus-MH – Hazards USA Multi-Hazard HUC – Hydrologic Unit Code IDEM – Indiana Department of Environmental Management IDHS – Indiana Department of Homeland Security INDOT – Indiana Department of Transportation IDNR – Indiana Department of Natural Resources INDWD – Indiana Department of Workforce Development IGS – Indiana Geological Survey ISDA – Indiana State Department of Agriculture MHMP – Multi-Hazard Mitigation Plan NCDC – National Climatic Data Center NEHRP – National Earthquake Hazards Reduction Program NFIP – National Flood Insurance Program NOAA – National Oceanic and Atmospheric Administration NSF – National Science Foundation NWS – National Weather Service OCRA – Office of Community and Rural Affairs PPM – Parts Per Million SPC – Storm Prediction Center USACE – United States Army Corps of Engineers USDA – United States Department of Agriculture USGS – United States Geological Survey iii Clark County Multi-Hazard Mitigation Plan Updated: October 2015 Table of Contents Introduction .................................................................................................................................................. 3 Prerequisites ................................................................................................................................................. 6 2.1 Multi-Jurisdictional Plan Adoption .......................................................................................... 6 2.2 Jurisdiction Participation ......................................................................................................... 6 Planning Process ........................................................................................................................................... 8 3.1 Planning Team Information .................................................................................................... 9 3.2 Review of Existing Plans ........................................................................................................ 10 3.3 Review of Technical and Fiscal Resources ............................................................................ 11 3.4 Public Involvement ................................................................................................................ 11 3.5 Neighboring County and Community Participation .............................................................. 12 County Profile ............................................................................................................................................. 13 4.1 Geography, Topography, and Climate .................................................................................. 14 4.2 Demography .......................................................................................................................... 16 4.3 Population Change…………………………………………………………………………………………..……………….16 4.4 Special Needs Populations .................................................................................................... 21 4.5 Economy and Industry .......................................................................................................... 24 4.6 Commuting Patterns ............................................................................................................. 28 4.7 Transportation ...................................................................................................................... 28 4.8 Major Waterways and Watersheds ...................................................................................... 29 4.9 Land-Use and Development Trends ...................................................................................... 30 Risk Assessment .......................................................................................................................................... 31 5.1 Identifying Hazards ............................................................................................................... 31 5.1.1 Existing Plans ............................................................................................................ 31 5.1.2 Historical Hazards Records ...................................................................................... 32 5.1.3 Hazard-Ranking Methodology ................................................................................. 32 5.1.4 GIS and Hazus-MH Modeling ................................................................................... 36 5.2 Assessing Vulnerability .......................................................................................................... 37 5.2.1 Identify Facilities ...................................................................................................... 38 iv Clark County Multi-Hazard Mitigation Plan Updated: October 2015 5.2.2 Building Replacement Costs..................................................................................... 39 5.3 Profiling Hazards ................................................................................................................... 39 5.3.1 Tornadoes ................................................................................................................ 39 5.3.2 Flood Hazard ............................................................................................................ 48 5.3.3 Earthquake Hazard ................................................................................................... 65 5.3.4 Severe Thunderstorm Hazard .................................................................................. 78 5.3.5 Winter Storm Hazard ............................................................................................... 82 5.3.6 Hazardous Materials Release Hazard ...................................................................... 85 5.3.7 Extreme Temperatures ............................................................................................ 95 5.3.8 Drought Hazard ...................................................................................................... 101 5.3.9 Dam/Levee Failure Hazard ..................................................................................... 105 5.3.10 Landslide Hazard/Ground Failure ........................................................................ 112 Mitigation Strategies ................................................................................................................................. 118 6.1 Community Action Potential Index (CAPI) .......................................................................... 118 6.2 Plans and Ordinances……………………………………………………………………………………………………..120 6.3 Mitigation Goals .................................................................................................................. 120 6.4 Mitigation Process, Prioritization, and Implementation ..................................................... 121 6.5 Multi-Jurisdictional Mitigation Strategy and Actions…………………………………….………………..121 Plan Maintenance ..................................................................................................................................... 137 7.1 Monitoring, Evaluating, and Updating the Plan .................................................................. 137 7.2 Implementation through Existing Programs ....................................................................... 138 7.3 Continued Public Involvement ...........................................................................................