STATE OF LOUISIANA HAZARD MITIGATION PLAN 2014 UPDATE admin PAGE INTENTIONALLY LEFT BLANK Prepared By: Louisiana Governor’s Office of Homeland Security and Emergency Preparedness 7667 Independence Blvd. Baton Rouge, LA 70806 With Support From: Department of Geography and Anthropology Department of Construction Management Louisiana State University Baton Rouge, LA 70803 PAGE INTENTIONALLY LEFT BLANK STATE OF LOUISIANA HAZARD MITIGATION PLAN i ACKNOWLEDGMENTS This 2014 State Hazard Mitigation Plan Update was coordinated by the State Hazard Mitigation Planning Committee (SHMPC) in collaboration with faculty, staff, and students at Louisiana State University and East Tennessee State University. The Governor’s Office of Homeland Security and Emergency Preparedness (GOHSEP) and its director, Kevin Davis, wish to thank all of the members of the entire State Hazard Mitigation Planning Committee (SHMPC) for their work on plan. Particularly, State Hazard Mitigation Officer Jeffrey Giering’s vision for a mitigation plan that is readable and useful to the public inspired the whole development of this Update. Finally, GOHSEP would like to thank the wide range of stakeholder representatives from federal, state, and local levels of government who provided feedback and expertise on this document, as well as personnel from non‐governmental organizations. This document is the richer for such inclusive help. A list of those individuals who generously aided in the creation of this document follows. 2014 GOHSEP STATE HAZARD MITIGATION PLANNING COMMITTEE Courtney Maciasz Jim Ferguson Bonnie Anderson Melanie Saucier Karim Belhadjali Andrea Galinski Wayne Ryland Richard Hollowell Bo Bolourchi George Chike Cindy O’Neal Manuel Martinez John Callahan Preston Bates Scott Van Keuren Jeffrey Giering Jason Lachney Rusti Liner Steve Garcia Kathleen Smith Brenda Cooper Nicolette English Keith Horn Jubal Marceaux Capital Region Planning Committee City of Baton Rouge Department of Public Works City of Carencro Coastal Protection and Restoration Authority Coastal Protection and Restoration Authority Coastal Protection and Restoration Department of Corrections Department of Health and Hospitals DOTD DOTD DOTD Facility Planning and Control GOHSEP GOHSEP GOHSEP State Hazard Mitigation Officer GOHSEP GOHSEP GOHSEP GOHSEP GOHSEP Mitigation Planner GOHSEP Mitigation Planner Louisiana Department of Environmental Quality Louisiana Department of Wildlife and Fisheries STATE OF LOUISIANA HAZARD MITIGATION PLAN i ii STATE OF LOUISIANA Eddie Skena Nikki Blazies Nicole Hobson‐Morris Angie White Dodi Langlois Joe Delaune Melissa Becker John Rahaim Jennifer Gerbasi Charles Reulet Ronald Moore Sara Krupa Gary Ramsey Melissa Harris Sandra Turley Darren Guidry Pam Roussel Rebecca Broussard Doug Zettlemoyer Collin Simoneaux Tommy Theibaud Linda Pace Jim Ferguson Bonnie Anderson Sandra Gunner William Haygood Lara Robertson Pamela Ehlers Steven Tassin Pat Skinner HAZARD MITIGATION PLAN Louisiana Department of Wildlife and Fisheries LMA Louisiana State Historical Preservation Office OCD‐DRU/HMGP Office of Risk Management Office of State Fire Marshal Rapides Area Planning Commission SBPO/GOHSEP Terrebonne Parish Consolidated Government LDNR DOC LDNR CRT ORM Town of Iowa GOHSEP /Region 2 GOHSEP/Region 3 Vermilion Parish OEP GOHSEP / Region 5 GOHSEP / Region 9 Washington Parish OEP DNR Floodplain Management Association Floodplain Management Association Office of Community Development Disaster Recovery Unit Office of Community Development Disaster Recovery Unit Office of Community Development Disaster Recovery Unit U.S Department of Commerce (Economic Development Administration) DOTD LSU AgCenter 2014 GOHSEP STATE HAZARD MITIGATION PLAN UPDATE MEMBERS Mark Riley Jeffrey Giering Deputy Director, Disaster Recovery State Hazard Mitigation Officer Steven Garcia Erin Tramontozzi Brenda Cooper Nicolette English Sandy Dugas Kim Barnett ii STATE OF LOUISIANA Problem Resolution Officer Problem Resolution Officer Senior Planner Planner Disaster Recovery Specialist Team Lead Disaster Recovery Specialist Team Lead HAZARD MITIGATION PLAN STATE OF LOUISIANA HAZARD MITIGATION PLAN iii 2014 SHMPC LOUISIANA STATE UNIVERSITY ADVISORY TEAM Carol J. Friedland, Ph.D., P.E., C.F.M. T. Andrew Joyner, Ph.D. Project Manager, Assistant Professor Assistant Project Manager, Hazard Mapping/GIS Kristopher M. Mecholsky, Ph.D. Technical Writer Robert V. Rohli, Ph.D. Project Manager, Professor Joshua Gilliland, M.S. Hazard Mapping/GIS Seyed Armin Madani, M.S. Shandy Ogea, B.S. Hazus Modeling Department of Construction Management Department of Geography and Anthropology Department of Geography and Anthropology Department of Geography and Anthropology Department of Geography and Anthropology Engineering Science Program SHPO Assessments Lynne M. Carter, Ph.D. Climate Subject Matter Expert Rebekah Jones Climate Subject Matter Expert Department of Construction Management Southern Climate Impacts Planning Program Department of Geography and Anthropology STATE HAZARD MITIGATION PLANNING COMMITTEE AGENCIES Coastal Protection and Restoration Authority Department of Agriculture and Forestry (DAF) Department of Corrections Department of Culture, Recreation & Tourism Department of Environmental Quality (DEQ) Department of Health and Human Services Department of Historic Preservation Department of Natural Resources (DNR) Department of Public Safety (DPS) Department of Transportation and Development (DOTD) Department of Wildlife and Fisheries (DWF) Division of Administration, (Facility, Planning & Control) Division of Administration, Office of Community Development, Disaster Recovery Unit (DOA‐OCD‐DRU) Division of Administration, Office of Risk Management (DOA‐ORM) Governor’s Office of Coastal Activities (OCA) Governor’s Office of Homeland Security and Emergency Preparedness (GOHSEP) STATE OF LOUISIANA HAZARD MITIGATION PLAN iii iv STATE OF LOUISIANA HAZARD MITIGATION PLAN TABLE OF CONTENTS Acknowledgments ................................................................................................................... i Table of Contents .................................................................................................................. iv 1. Introduction ................................................................................................................. 1‐1 Location and Hazard Risk ........................................................................................................ 1‐1 Hazard Mitigation ................................................................................................................... 1‐2 General Strategy ..................................................................................................................... 1‐4 The 2014 Plan Update............................................................................................................. 1‐5 2. Hazard Identification and Statewide Risk Assessment ................................................... 2‐1 Local Risk Assessments ........................................................................................................... 2‐1 State Profile ............................................................................................................................ 2‐5 Geography ........................................................................................................................... 2‐5 Climate ................................................................................................................................ 2‐7 History ................................................................................................................................. 2‐8 Changes in Development Through Land Cover Change Detection ................................... 2‐13 Climatological Hazards .......................................................................................................... 2‐15 Drought ............................................................................................................................. 2‐17 Extreme Heat .................................................................................................................... 2‐22 Flooding............................................................................................................................. 2‐27 Thunderstorms .................................................................................................................. 2‐65 Tornadoes ....................................................................................................................... 2‐108 Tropical Cyclones ............................................................................................................ 2‐130 Wildfires .......................................................................................................................... 2‐176 Winter Weather .............................................................................................................. 2‐197 Geological/Human‐Influenced Hazards .............................................................................. 2‐217 Coastal Hazards ............................................................................................................... 2‐218 Dam Failure ..................................................................................................................... 2‐244 Earthquake ...................................................................................................................... 2‐257 Levee Failure ................................................................................................................... 2‐261 Sinkholes ......................................................................................................................... 2‐273 Summary of Risk Assessments ............................................................................................ 2‐292 Coastal Parishes .............................................................................................................. 2‐293 Inland Southern Parishes ................................................................................................ 2‐294 Central Parishes .............................................................................................................. 2‐294 Northwest Parishes ......................................................................................................... 2‐295 3. State Historical Properties Risk Assessment .................................................................. 3‐1 4. Capability Assessment .................................................................................................. 4‐1 State Policies and Programs.................................................................................................... 4‐1 Policies ................................................................................................................................ 4‐1 Programs ............................................................................................................................. 4‐5 iv STATE OF LOUISIANA HAZARD MITIGATION PLAN STATE OF LOUISIANA HAZARD MITIGATION PLAN v Hazard Management Capabilities ......................................................................................... 4‐17 Personnel Capability.......................................................................................................... 4‐17 Technical Capability .......................................................................................................... 4‐19 Financial Capability ........................................................................................................... 4‐20 Local Capability Assessment ................................................................................................. 4‐36 Coordination of Local Planning ............................................................................................. 4‐38 Local Plan Review Process ................................................................................................. 4‐41 Prioritizing Parish and Municipal Assistance ..................................................................... 4‐41 Maximizing Benefits According to Benefit‐Cost Review of Local Projects ........................ 4‐43 Prioritization of Parishes to Receive HMGP Funding ........................................................ 4‐44 5. Mitigation Strategy ....................................................................................................... 5‐1 Goals ....................................................................................................................................... 5‐1 Actions .................................................................................................................................... 5‐2 Mitigation Monitoring and Review ....................................................................................... 5‐11 6. Mitigation in Action ...................................................................................................... 6‐1 Louisiana Mitigation Projects.................................................................................................. 6‐2 Community Education Outreach ......................................................................................... 6‐2 City of Slidell ...................................................................................................................... 6‐81 Parish Mitigation Projects ................................................................................................. 6‐87 Town of Jean Lafitte .......................................................................................................... 6‐93 APPENDICES A. Planning Process ........................................................................................................... A‐1 Purpose ................................................................................................................................... A‐1 Planning .................................................................................................................................. A‐1 Coordination Among Agencies ............................................................................................... A‐5 Program Integration ............................................................................................................... A‐7 Documentation ....................................................................................................................... A‐9 Meeting #1 ........................................................................................................................ A‐10 Meeting #2 ........................................................................................................................ A‐19 Meeting #3 ........................................................................................................................ A‐23 Meeting #4 ........................................................................................................................ A‐25 Meeting #5 ........................................................................................................................ A‐31 Meeting #6 ........................................................................................................................ A‐35 B. Plan Maintenance ......................................................................................................... B‐1 Purpose ................................................................................................................................... B‐1 Monitoring, Evaluating and Updating the Plan ....................................................................... B‐1 Responsible Parties ............................................................................................................. B‐1 Methods for Monitoring and Evaluating the Plan ............................................................... B‐2 Plan Evaluation Criteria ....................................................................................................... B‐3 Updating the Plan................................................................................................................ B‐3 2011 Plan Method and Schedule Evaluation ...................................................................... B‐4 STATE OF LOUISIANA HAZARD MITIGATION PLAN v vi C. STATE OF LOUISIANA HAZARD MITIGATION PLAN Mapping Methodology ................................................................................................. C‐1 State Information.................................................................................................................... C‐1 Population ........................................................................................................................... C‐1 State Property ..................................................................................................................... C‐1 Land Cover .......................................................................................................................... C‐2 Climatological Hazards ............................................................................................................ C‐3 Droughts .............................................................................................................................. C‐3 Extreme Heat ...................................................................................................................... C‐3 Flooding............................................................................................................................... C‐4 Thunderstorms .................................................................................................................... C‐5 Tornadoes ........................................................................................................................... C‐6 Tropical Cyclones ................................................................................................................ C‐6 Wildfires .............................................................................................................................. C‐9 Winter Weather .................................................................................................................. C‐9 Geological/Human‐Influenced Hazards .................................................................................. C‐9 Coastal Hazards ................................................................................................................. C‐10 Dam Failure ....................................................................................................................... C‐10 Earthquake ........................................................................................................................ C‐11 Levee Failure ..................................................................................................................... C‐11 Sinkholes ........................................................................................................................... C‐11 Risk and Vulnerability ........................................................................................................... C‐11 D. Plan Adoption ............................................................................................................... D‐1 E. vi Endnotes ...................................................................................................................... E‐1 STATE OF LOUISIANA HAZARD MITIGATION PLAN