MULTI-HAZARD MITIGATION PLAN UPDATE Grant County, Indiana Prepared for: Grant County, Indiana Town of Converse, Indiana Town of Fairmount, Indiana Town of Fowlerton, Indiana City of Gas City, Indiana City of Jonesboro, Indiana City of Marion, Indiana Town of Matthews, Indiana Town of Swayzee, Indiana Town of Sweetser, Indiana Town of Upland, Indiana Town of Van Buren, Indiana January 2017 Prepared by Christopher B. Burke Engineering, LLC 115 West Washington Street, Suite 1368 South Indianapolis, Indiana 46204 CBBEL Project No. 16-194 DISCLAIMER Exhibits and any GIS data used within this report are not intended to be used as legal documents or references. They are intended to serve as an aid in graphic representation only. Information shown on exhibits is not warranted for accuracy or merchantability. LOCAL PROJECT CONTACTS: Bruce Bender, Director 401 South Adams Street Marion IN 46953 765.651.2410 [email protected] Tom Culley, Deputy Director 401 South Adams Street Marion IN 46953 765.651.2410 [email protected] Grant County MHMP Update January 2017 TABLE OF CONTENTS Chapter 1 Introduction .................................................................................................................... 1 1.1 Disaster Life Cycle ............................................................................................................................................ 1 1.2 Project Scope and Purpose .............................................................................................................................. 2 1.3 Planning Process ............................................................................................................................................... 3 1.3.1 Planning Committee and Project Team ................................................................................................... 3 1.3.2 Public Involvement ...................................................................................................................................... 4 1.4 Plans, Studies, Reports, and Technical Information ................................................................................... 5 Chapter 2 Community Information ................................................................................................. 7 2.1 Population and Demographics ....................................................................................................................... 7 2.2 Employment ...................................................................................................................................................... 7 2.3 Transportation and Commutiing Patterns .................................................................................................... 8 2.4 Critical and Non-Critical Infrastructure ...................................................................................................... 10 2.5 Major Waterways and Watersheds ............................................................................................................... 11 2.6 NFIP Participation ......................................................................................................................................... 11 2.7 Topography ...................................................................................................................................................... 12 2.8 Climate .............................................................................................................................................................. 12 Chapter 3 Risk Assessment ............................................................................................................ 15 3.1 Hazard Identification ..................................................................................................................................... 15 3.1.1 Hazard Selection ........................................................................................................................................ 15 3.2 Hazard Ranking ............................................................................................................................................... 16 3.2.1 Probability ................................................................................................................................................... 16 3.2.2 Magnitude / Severity ................................................................................................................................. 16 3.2.3 Warning Time ............................................................................................................................................. 17 3.2.4 Duration ...................................................................................................................................................... 17 3.2.5 Calculating the CPRI ................................................................................................................................. 17 3.3 Hazard profiles ................................................................................................................................................ 18 3.3.1 Drought ....................................................................................................................................................... 21 3.3.2 Earthquake .................................................................................................................................................. 26 3.3.3 Extreme Temperature ............................................................................................................................... 31 3.3.4 Flood ............................................................................................................................................................ 36 3.3.6 Landslide/Subsidence ............................................................................................................................... 50 3.3.7 Tornado ....................................................................................................................................................... 53 i Grant County MHMP Update January 2017 3.3.8 Wildfire ........................................................................................................................................................ 58 3.3.9 Winter Storm & Ice ................................................................................................................................... 61 3.3.10 Dam Failure ............................................................................................................................................ 66 3.3.11 Hazardous Materials Incident .............................................................................................................. 70 3.4 Hazard Summary ............................................................................................................................................. 75 Chapter 4 Mitigation Goals and Practices ..................................................................................... 80 4.1 Mitigation Goal ............................................................................................................................................... 80 4.2 Mitigation Practices ........................................................................................................................................ 80 Chapter 5 Implementation Plan .................................................................................................... 94 5.1 Building Protection ......................................................................................................................................... 94 5.2 Emergency Preparedness & Warning .......................................................................................................... 94 5.3 Emergency Response and Recovery ............................................................................................................ 96 5.4 Floodplain Management ................................................................................................................................ 98 5.5 Geographic Information Systems ................................................................................................................ 98 5.6 Hazardous Materials Response Team .......................................................................................................... 98 5.7 Management of High Hazard Dams ............................................................................................................ 99 5.8 Public Education and Outreach ................................................................................................................... 99 5.9 Safer Rooms and Community Shelters ...................................................................................................... 100 5.10 Stormwater Management ............................................................................................................................. 100 5.11 Transportation ............................................................................................................................................... 100 5.12 Tree Maintenance.......................................................................................................................................... 101 Chapter 6 Plan Maintenance Process ..........................................................................................