FEMA Flood Boundary

MAY 4, 2021 COUSHATTA TRIBE OF LOUISIANA TRIBAL HAZARD MITIGATION PLAN UPDATE PUBLIC REVIEW DRAFT MAY 2021 Prepared by BEVERLY O'DEA BRIDGEVIEW CONSULTING, LLC 915 N. Laurel Lane Tacoma, WA 98406 (253) 380-5736 Coushatta Tribe of Louisiana 2021 Hazard Mitigation Plan Update Prepared for Coushatta Tribe of Louisiana Coushatta Tribal Fire Department P.O. Box 818 Elton, LA 70532 Prepared by Bridgeview Consulting, LLC B everly O’Dea 915 N. Laurel Lane Tacoma, WA 98406 (253) 380-5736 TABLE OF CONTENTS <a href="#16_0">Executive Summary......................................................................................................... xiii </a><a href="#17_0">Plan Update.................................................................................................................................................xiv </a> <a href="#18_0">Initial Response to the DMA for the Coushatta Tribe ...........................................................................xv </a><a href="#18_1">The 2021 Coushatta Tribe of Louisiana Update</a><a href="#18_1">—</a><a href="#18_1">What has changed?.................................................xv </a><a href="#20_0">Plan Development Methodolog</a><a href="#20_0">y</a><a href="#20_0">.</a><a href="#20_0">..............................................................................................................xvii </a><a href="#0_0">Chapter 1. Introduction to Hazzard Mitigation Planning..............................................</a><a href="#0_0">.</a><a href="#0_0">1</a><a href="#0_0">-1 </a><a href="#0_1">1.1 Authority .............................................................................................................................................</a><a href="#0_1">.</a><a href="#0_1">1</a><a href="#0_1">-1 </a><a href="#0_2">1.2 Acknowledgements.............................................................................................................................</a><a href="#0_2">.</a><a href="#0_2">1</a><a href="#0_2">-2 </a><a href="#0_3">1.3 COVID-19.............................................................................................................................................</a><a href="#0_3">.</a><a href="#0_3">1</a><a href="#0_3">-3 </a><a href="#0_4">1.4 Purpose of Planning ............................................................................................................................</a><a href="#0_4">.</a><a href="#0_4">1</a><a href="#0_4">-3 </a><a href="#0_5">1.5 Who Will Benefit from this Plan?........................................................................................................</a><a href="#0_5">.</a><a href="#0_5">1</a><a href="#0_5">-4 </a><a href="#0_6">1.6 Billion Dollar Disasters ........................................................................................................................</a><a href="#0_6">.</a><a href="#0_6">1</a><a href="#0_6">-4 </a><a href="#0_7">1.7 Plan Adoption......................................................................................................................................</a><a href="#0_7">.</a><a href="#0_7">1</a><a href="#0_7">-7 </a><a href="#0_0">Chapter 2. Plan Update Approac</a><a href="#0_0">h</a><a href="#0_0">.</a><a href="#0_0">................................................................................</a><a href="#0_0">.</a><a href="#0_0">2</a><a href="#0_0">-1 </a><a href="#0_5">2.1 Planning Resource Organizatio</a><a href="#0_5">n</a><a href="#0_5">.</a><a href="#0_5">........................................................................................................</a><a href="#0_5">.</a><a href="#0_5">2</a><a href="#0_5">-1 </a><a href="#0_8">2.2 Secure Grant Funding .........................................................................................................................</a><a href="#0_8">.</a><a href="#0_8">2</a><a href="#0_8">-1 </a><a href="#0_9">2.3 Formation of the Planning Team ........................................................................................................</a><a href="#0_9">.</a><a href="#0_9">2</a><a href="#0_9">-1 </a><a href="#0_10">2.4 Coordination With Agencies and Other Stakeholder</a><a href="#0_10">s</a><a href="#0_10">.</a><a href="#0_10">.......................................................................</a><a href="#0_10">.</a><a href="#0_10">2</a><a href="#0_10">-4 </a><a href="#0_11">2.5 Review of Plans and Studies ...............................................................................................................</a><a href="#0_11">.</a><a href="#0_11">2</a><a href="#0_11">-6 </a><a href="#0_3">2.6 Public Involvement..............................................................................................................................</a><a href="#0_3">.</a><a href="#0_3">2</a><a href="#0_3">-7 </a><ul style="display: flex;"><li style="flex:1"><a href="#0_11">2.6.1 </a></li><li style="flex:1"><a href="#0_11">Public Defined ....................................................................................................................</a><a href="#0_11">.</a><a href="#0_11">2</a><a href="#0_11">-7 </a></li></ul><a href="#0_12">2.7 Plan Development Milestone</a><a href="#0_12">s</a><a href="#0_12">.</a><a href="#0_12">...........................................................................................................</a><a href="#0_12">.</a><a href="#0_12">2</a><a href="#0_12">-7 </a> <a href="#0_13">2.7.1 </a><a href="#0_14">2.7.2 </a><a href="#0_15">2.7.3 </a><a href="#0_7">2.7.4 </a><a href="#0_16">2.7.5 </a> <a href="#0_13">Public Outreach Strategy ...................................................................................................</a><a href="#0_13">.</a><a href="#0_13">2</a><a href="#0_13">-7 </a><a href="#0_14">Hazard Questionnaire ........................................................................................................</a><a href="#0_14">.</a><a href="#0_14">2</a><a href="#0_14">-8 </a><a href="#0_15">Internet ............................................................................................................................</a><a href="#0_15">.</a><a href="#0_15">2-11 </a><a href="#0_7">News Releases and Announcements ...............................................................................</a><a href="#0_7">.</a><a href="#0_7">2-12 </a><a href="#0_16">Public Meetings................................................................................................................</a><a href="#0_16">.</a><a href="#0_16">2-12 </a><a href="#0_7">2.8 Plan Development Milestone</a><a href="#0_7">s</a><a href="#0_7">.</a><a href="#0_7">.........................................................................................................</a><a href="#0_7">.</a><a href="#0_7">2-14 </a><a href="#0_0">Chapter 3. Tribal Profile .................................................................................................</a><a href="#0_0">.</a><a href="#0_0">3</a><a href="#0_0">-1 </a><a href="#0_5">3.1 Tribal History.......................................................................................................................................</a><a href="#0_5">.</a><a href="#0_5">3</a><a href="#0_5">-1 </a><a href="#0_17">3.2 Tribal Governance...............................................................................................................................</a><a href="#0_17">.</a><a href="#0_17">3</a><a href="#0_17">-2 </a><a href="#0_18">3.3 Tribal Departments and Programs......................................................................................................</a><a href="#0_18">.</a><a href="#0_18">3</a><a href="#0_18">-2 </a><a href="#0_19">3.4 Membership........................................................................................................................................</a><a href="#0_19">.</a><a href="#0_19">3</a><a href="#0_19">-5 </a><a href="#0_20">3.5 Population...........................................................................................................................................</a><a href="#0_20">.</a><a href="#0_20">3</a><a href="#0_20">-5 </a><ul style="display: flex;"><li style="flex:1">Bridgeview Consulting </li><li style="flex:1">i</li><li style="flex:1">July 2021 </li></ul>TABLE OF CONTENTS <a href="#0_21">3.5.1 </a><a href="#0_22">3.5.2 </a><a href="#0_23">3.5.3 </a><a href="#0_24">3.5.4 </a><a href="#0_25">3.5.5 </a><a href="#0_7">3.5.6 </a><a href="#0_7">3.5.7 </a> <a href="#0_21">Population Trend</a><a href="#0_21">s</a><a href="#0_21">.</a><a href="#0_21">.............................................................................................................</a><a href="#0_21">.</a><a href="#0_21">3</a><a href="#0_21">-6 </a><a href="#0_22">Social Vulnerability.............................................................................................................</a><a href="#0_22">.</a><a href="#0_22">3</a><a href="#0_22">-6 </a><a href="#0_23">Age Distribution .................................................................................................................</a><a href="#0_23">.</a><a href="#0_23">3</a><a href="#0_23">-7 </a><a href="#0_24">Race, Ethnicity, and Language............................................................................................</a><a href="#0_24">.</a><a href="#0_24">3</a><a href="#0_24">-8 </a><a href="#0_25">Disabled Populations..........................................................................................................</a><a href="#0_25">.</a><a href="#0_25">3</a><a href="#0_25">-8 </a><a href="#0_7">Income................................................................................................................................</a><a href="#0_7">.</a><a href="#0_7">3</a><a href="#0_7">-9 </a><a href="#0_7">Housing Stock...................................................................................................................</a><a href="#0_7">.</a><a href="#0_7">3-10 </a><a href="#0_26">3.6 Planning Area Geography .................................................................................................................</a><a href="#0_26">.</a><a href="#0_26">3-10 </a> <a href="#0_27">3.6.1 </a><a href="#0_28">3.6.2 </a> <a href="#0_27">Climate .............................................................................................................................</a><a href="#0_27">.</a><a href="#0_27">3-11 </a><a href="#0_28">Impact from Climate Change ...........................................................................................</a><a href="#0_28">.</a><a href="#0_28">3-14 </a><a href="#0_29">3.7 Natural Resource</a><a href="#0_29">s</a><a href="#0_29">.</a><a href="#0_29">............................................................................................................................</a><a href="#0_29">.</a><a href="#0_29">3-14 </a><a href="#0_30">3.8 Major Past Hazard Events .................................................................................................................</a><a href="#0_30">.</a><a href="#0_30">3-15 </a><a href="#0_7">3.9 Critical Facilities and Infrastructur</a><a href="#0_7">e</a><a href="#0_7">.</a><a href="#0_7">.................................................................................................</a><a href="#0_7">.</a><a href="#0_7">3-18 </a><a href="#0_31">3.9.1 </a><a href="#0_32">3.9.2 </a> <a href="#0_31">Critical Facilities Defined for the 2021 Update ................................................................</a><a href="#0_31">.</a><a href="#0_31">3-18 </a><a href="#0_32">Structure Data Limitation.................................................................................................</a><a href="#0_32">.</a><a href="#0_32">3-21 </a><a href="#0_33">3.10 Infrastructur</a><a href="#0_33">e</a><a href="#0_33">.</a><a href="#0_33">.................................................................................................................................</a><a href="#0_33">.</a><a href="#0_33">3-22 </a><a href="#0_34">3.11 Cultural and Sacred Sites ................................................................................................................</a><a href="#0_34">.</a><a href="#0_34">3-23 </a><a href="#0_35">3.12 Cultural Heritage.............................................................................................................................</a><a href="#0_35">.</a><a href="#0_35">3-23 </a><a href="#0_7">3.13 Economic Base ................................................................................................................................</a><a href="#0_7">.</a><a href="#0_7">3-24 </a><a href="#0_36">3.14 Tribal Economic Outlook.................................................................................................................</a><a href="#0_36">.</a><a href="#0_36">3-24 </a><a href="#0_7">3.15 Land Use..........................................................................................................................................</a><a href="#0_7">.</a><a href="#0_7">3-25 </a><a href="#0_37">3.15.1 </a><a href="#0_38">3.15.2 </a> <a href="#0_37">Agriculture........................................................................................................................</a><a href="#0_37">.</a><a href="#0_37">3-25 </a><a href="#0_38">Critical Areas ....................................................................................................................</a><a href="#0_38">.</a><a href="#0_38">3-26 </a><a href="#0_39">3.16 Changes in Development ................................................................................................................</a><a href="#0_39">.</a><a href="#0_39">3-29 </a> <a href="#0_40">3.16.1 </a><a href="#0_41">3.16.2 </a><a href="#0_42">3.16.3 </a> <a href="#0_40">Residential Developmen</a><a href="#0_40">t</a><a href="#0_40">.</a><a href="#0_40">................................................................................................</a><a href="#0_40">.</a><a href="#0_40">3-31 </a><a href="#0_41">Non-Residential Developmen</a><a href="#0_41">t</a><a href="#0_41">.</a><a href="#0_41">........................................................................................</a><a href="#0_41">.</a><a href="#0_41">3-31 </a><a href="#0_42">Structure Type and Age....................................................................................................</a><a href="#0_42">.</a><a href="#0_42">3-33 </a><a href="#0_43">3.17 Laws and Ordinances ......................................................................................................................</a><a href="#0_43">.</a><a href="#0_43">3-34 </a> <a href="#0_44">3.17.1 </a><a href="#0_45">3.17.2 </a><a href="#0_46">3.17.3 </a> <a href="#0_44">Tribal and State-Level Planning Initiative</a><a href="#0_44">s</a><a href="#0_44">.</a><a href="#0_44">......................................................................</a><a href="#0_44">.</a><a href="#0_44">3-34 </a><a href="#0_45">Louisiana State Hazard Mitigation Plan ...........................................................................</a><a href="#0_45">.</a><a href="#0_45">3-34 </a><a href="#0_46">Other Planning Initiatives.................................................................................................</a><a href="#0_46">.</a><a href="#0_46">3-35 </a><a href="#0_0">Chapter 4. Hazard Identification and</a><a href="#0_0"> </a><a href="#0_0">Risk Assessment Methodology ......................</a><a href="#0_0">.</a><a href="#0_0">4</a><a href="#0_0">-1 </a><a href="#0_47">4.1 Overview .............................................................................................................................................</a><a href="#0_47">.</a><a href="#0_47">4</a><a href="#0_47">-1 </a><a href="#0_48">4.2 Risk Assessment Approach .................................................................................................................</a><a href="#0_48">.</a><a href="#0_48">4</a><a href="#0_48">-1 </a><ul style="display: flex;"><li style="flex:1"><a href="#0_7">4.2.1 </a></li><li style="flex:1"><a href="#0_7">Common Terminology........................................................................................................</a><a href="#0_7">.</a><a href="#0_7">4</a><a href="#0_7">-3 </a></li></ul><a href="#0_49">4.3 Building Inventor</a><a href="#0_49">y</a><a href="#0_49">.</a><a href="#0_49">..............................................................................................................................</a><a href="#0_49">.</a><a href="#0_49">4</a><a href="#0_49">-3 </a><a href="#0_50">4.4 Probability of Occurrence and Return Intervals .................................................................................</a><a href="#0_50">.</a><a href="#0_50">4</a><a href="#0_50">-3 </a><ul style="display: flex;"><li style="flex:1">Bridgeview Consulting </li><li style="flex:1">ii </li><li style="flex:1">July 2021 </li></ul>TABLE OF CONTENTS <a href="#0_51">4.5 Hazard Identification and Profiles.......................................................................................................</a><a href="#0_51">.</a><a href="#0_51">4</a><a href="#0_51">-4 </a><a href="#0_52">4.6 Hazus and GIS Applications.................................................................................................................</a><a href="#0_52">.</a><a href="#0_52">4</a><a href="#0_52">-5 </a><a href="#0_53">4.7 Limitations...........................................................................................................................................</a><a href="#0_53">.</a><a href="#0_53">4</a><a href="#0_53">-7 </a><a href="#0_4">4.8 Calculated Priority Risk Index Scoring Criteri</a><a href="#0_4">a</a><a href="#0_4">.</a><a href="#0_4">...................................................................................</a><a href="#0_4">.</a><a href="#0_4">4</a><a href="#0_4">-8 </a><a href="#0_54">Chapter 5. Drought .........................................................................................................</a><a href="#0_54">.</a><a href="#0_54">5</a><a href="#0_54">-1 </a><a href="#0_55">5.1 General Background............................................................................................................................</a><a href="#0_55">.</a><a href="#0_55">5</a><a href="#0_55">-1 </a><a href="#0_56">5.2 Hazard Profile......................................................................................................................................</a><a href="#0_56">.</a><a href="#0_56">5</a><a href="#0_56">-1 </a><a href="#0_57">5.2.1 </a><a href="#0_58">5.2.2 </a><a href="#0_59">5.2.3 </a><a href="#0_7">5.2.4 </a> <a href="#0_57">Extent and Location ...........................................................................................................</a><a href="#0_57">.</a><a href="#0_57">5</a><a href="#0_57">-1 </a><a href="#0_58">Previous Occurrences.........................................................................................................</a><a href="#0_58">.</a><a href="#0_58">5</a><a href="#0_58">-3 </a><a href="#0_59">Severity...............................................................................................................................</a><a href="#0_59">.</a><a href="#0_59">5</a><a href="#0_59">-4 </a><a href="#0_7">Frequency...........................................................................................................................</a><a href="#0_7">.</a><a href="#0_7">5</a><a href="#0_7">-8 </a><a href="#0_60">5.3 Vulnerability Assessment....................................................................................................................</a><a href="#0_60">.</a><a href="#0_60">5</a><a href="#0_60">-8 </a> <a href="#0_61">5.3.1 </a><a href="#0_3">5.3.2 </a><a href="#0_62">5.3.3 </a><a href="#0_63">5.3.4 </a><a href="#0_64">5.3.5 </a><a href="#0_65">5.3.6 </a><a href="#0_66">5.3.7 </a> <a href="#0_61">Overview ............................................................................................................................</a><a href="#0_61">.</a><a href="#0_61">5</a><a href="#0_61">-8 </a><a href="#0_3">Warning Time.....................................................................................................................</a><a href="#0_3">.</a><a href="#0_3">5</a><a href="#0_3">-9 </a><a href="#0_62">Impact on Life, Health and Safet</a><a href="#0_62">y</a><a href="#0_62">.</a><a href="#0_62">.....................................................................................</a><a href="#0_62">.</a><a href="#0_62">5</a><a href="#0_62">-9 </a><a href="#0_63">Impact on Property ..........................................................................................................</a><a href="#0_63">.</a><a href="#0_63">5-10 </a><a href="#0_64">Impact on Critical Facilities and Infrastructur</a><a href="#0_64">e</a><a href="#0_64">.</a><a href="#0_64">...............................................................</a><a href="#0_64">.</a><a href="#0_64">5-10 </a><a href="#0_65">Impact on Economy .........................................................................................................</a><a href="#0_65">.</a><a href="#0_65">5-10 </a><a href="#0_66">Impact on Environment ...................................................................................................</a><a href="#0_66">.</a><a href="#0_66">5-11 </a><a href="#0_67">5.4 Future Development Trend</a><a href="#0_67">s</a><a href="#0_67">.</a><a href="#0_67">............................................................................................................</a><a href="#0_67">.</a><a href="#0_67">5-11 </a><a href="#0_62">5.5 Climate Change Impacts ...................................................................................................................</a><a href="#0_62">.</a><a href="#0_62">5-12 </a><a href="#0_43">5.6 Issues.................................................................................................................................................</a><a href="#0_43">.</a><a href="#0_43">5-13 </a><a href="#0_68">5.7 Impact and Results............................................................................................................................</a><a href="#0_68">.</a><a href="#0_68">5-13 </a><a href="#0_69">Chapter 6. Flood .............................................................................................................</a><a href="#0_69">.</a><a href="#0_69">6</a><a href="#0_69">-1 </a><a href="#0_70">6.1 General Background............................................................................................................................</a><a href="#0_70">.</a><a href="#0_70">6</a><a href="#0_70">-1 </a> <a href="#0_71">6.1.1 </a><a href="#0_72">6.1.2 </a><a href="#0_73">6.1.3 </a><a href="#0_74">6.1.4 </a><a href="#0_75">6.1.5 </a> <a href="#0_71">Flooding Types ...................................................................................................................</a><a href="#0_71">.</a><a href="#0_71">6</a><a href="#0_71">-1 </a><a href="#0_72">Measuring Floods and Floodplains ....................................................................................</a><a href="#0_72">.</a><a href="#0_72">6</a><a href="#0_72">-4 </a><a href="#0_73">Flood Insurance Rate Maps................................................................................................</a><a href="#0_73">.</a><a href="#0_73">6</a><a href="#0_73">-5 </a><a href="#0_74">National Flood Insurance Program (NFIP)..........................................................................</a><a href="#0_74">.</a><a href="#0_74">6</a><a href="#0_74">-8 </a><a href="#0_75">Repetitive Flood Claim and Severe Repetitive Loss Impac</a><a href="#0_75">t</a><a href="#0_75">.</a><a href="#0_75">............................................</a><a href="#0_75">.</a><a href="#0_75">6-11 </a>

FEMA Flood Boundary

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