Cleveland County Hazard Mitigation Plan Update 2020-2025
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Cleveland County Hazard Mitigation Plan Update 2020-2025 Table of Contents Chapter 1: Introduction ................................................................................................................4 Section 1.1 Overview ...................................................................................................................4 Section 1.2 Participating Jurisdictions .........................................................................................5 Chapter 2: Planning Process .........................................................................................................6 Section 2.1 Overview ...................................................................................................................6 Section 2.2 Planning Committee Members ..................................................................................7 Section 2.3 Other Stakeholders ....................................................................................................9 Section 2.4 Public Involvement .................................................................................................10 Section 2.5 Plans, Documents, and Literature Reviewed ..........................................................12 Section 2.6 Continued Public Involvement ................................................................................14 Section 2.7 Plan Update Review: Monitoring, Evaluation, Implementation .............................15 Chapter 3: Hazard Identification ...............................................................................................17 Section 3.1 List of Identified Hazards ........................................................................................17 Section 3.2 Disaster History .......................................................................................................18 Section 3.3 Hazard Probability Rating .......................................................................................19 Section 3.4 Profiled Hazards ......................................................................................................20 Section 3.4.1 Dam Failure .................................................................................................21 Section 3.4.2 Drought ........................................................................................................25 Section 3.4.3 Earthquake ...................................................................................................28 Section 3.4.4 Extreme Heat ...............................................................................................33 Section 3.4.5 Flood ............................................................................................................37 Section 3.4.6 Hail ...............................................................................................................41 Section 3.4.7 High Winds ..................................................................................................44 Section 3.4.8 Lightning ......................................................................................................47 Section 3.4.9 Tornado ........................................................................................................51 Section 3.4.10 Wildfire ......................................................................................................54 Section 3.4.11 Winter Storms ............................................................................................59 Section 3.5 Repetitive and Severe Repetitive Loss ...................................................................64 Chapter 4: Mitigation Strategy ...................................................................................................65 Section 4.1 Capabilities Assessment .........................................................................................65 Section 4.1.1. Existing Institutions ....................................................................................66 Section 4.1.2. Administrative and Technical .....................................................................68 Section 4.1.3. Financial Capabilities ..................................................................................69 Section 4.1.4. Education and Outreach ..............................................................................69 2 Cleveland County Hazard Mitigation Plan Update 2020-2025 Section 4.1.5. School District Capability Assessment ......................................................71 Section 4.2 NFIP Participation ..................................................................................................74 Section 4.3 Mitigation Goals .....................................................................................................75 Section 4.4 Action Items ...........................................................................................................76 Chapter 5: Plan Update .............................................................................................................104 Section 5.1 Analyzing Developmental Trends ........................................................................104 Section 5.2 Status of Previous Mitigation Action Items ..........................................................106 Section 5.3 Changes in Jurisdictional Prioritization ................................................................109 Section 5.4 Action Item Prioritization ......................................................................................109 Section 5.5 Integration of Data, Goals, and Action Items ........................................................110 Appendix: Maps (FOUO) ..........................................................................................................112 Cleveland County Maps ...........................................................................................................114 Flood Area Maps ......................................................................................................................119 City of Norman Repetitive Loss Maps .....................................................................................138 3 Cleveland County Hazard Mitigation Plan Update 2020-2025 CHAPTER ONE: INTRODUCTION 1.1 Overview of Planning Area Cleveland County, Oklahoma, is located in central Oklahoma and the third most populous county in the state, with 255,755 citizens as of the 2010 census. (It is estimated that Cleveland County’s population has grown to 279,641 as of 2017.) Cleveland County encompasses a total land area of 558 square miles, and the Oklahoma City Metropolitan Area extends into Cleveland County. The estimated populations of each jurisdiction are as follows: The city of Lexington had a population of 2,152 as of the 2010 U.S. Census. (As of 2017, it has a population of 2,151.) The city of Noble had a population of 6,481 as of the 2010 U.S. Census. (As of 2017, it has a population of 6,738.) The city of Norman had a population of 110,925 as of the 2010 U.S. Census. (As of 2017, it has a population of 122,843.) The town of Slaughterville had a population of 4,137 as of the 2010 U.S. Census. (As of 2017, it has a population of 4,299.) Strategy The Cleveland County Hazard Mitigation Plan Update 2020-2025 (hereafter CCHMPU) is completed in compliance with the Robert T. Stafford Disaster Relief and Emergency Assistance Act. This plan is updated every five years with FEMA to remain eligible for grant funding applications connected to the Hazard Mitigation Grant Program and also enhance the eligibility for other grant opportunities. The primary developer for the CCHMPU was the Cleveland County Emergency Management (hereafter referred to as CCEM) Deputy Director. The deputy director referenced the Oklahoma State Hazard Mitigation Plan Update 2014-2019 and the 2019 Oklahoma State Hazard Mitigation Plan Update to ensure consistency in recognizing and addressing the natural hazards that affect Cleveland County. The CCHMPU planning committee affirmed the hazards addressed in this CCHMPU at the initial planning meeting held March 2018. Details on this meeting can be found in Chapter 2. 4 Cleveland County Hazard Mitigation Plan Update 2020-2025 1.2 Participating Jurisdictions Participating jurisdictions in the CCHMPU include: • Cleveland County, unincorporated, • the City of Lexington, • the City of Noble, • the City of Norman, • the Town of Slaughterville; • the school districts of Lexington, Little Axe, Noble, Norman, and Robin Hill NOTE: Unless otherwise noted, “Cleveland County,” refers to all of the jurisdictions participating in this update. When referring to Cleveland County as an unincorporated area or government or geographic area, it will be specified. McClain, Oklahoma, and Pottawatomie Counties were included as stakeholders since they are neighboring counties. The City of Moore and Moore Public Schools were previous participants in the CCHMPU 2014- 2019, but they have opted to create their own hazard mitigation plan. They are no longer included as a participant in the CCHMPU. Therefore, previous City of Moore Action Items have been removed from this CCHMPU. The City of Oklahoma City also extends into Cleveland County geographically; however, the City of Oklahoma City has its own hazard mitigation plan and will not participate under the CCHMPU. 5 CHAPTER TWO: PLANNING PROCESS 2.1 Overview of Planning Process Cleveland County Emergency Management invited all participating jurisdictions to a kick-off meeting