Hazard Mitigation Plan Washington County, Arkansas
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Hazard Mitigation Plan Washington County, Arkansas Including: Unincorporated Washington County City of Elkins City of Elm Springs City of Farmington City of Fayetteville City of Goshen City of Greenland City of Johnson City of Lincoln City of Prairie Grove City of Springdale City of Tontitown City of West Fork City of Winslow Elkins School District Farmington School District Fayetteville School District Greenland School District Lincoln School District Prairie Grove School District Springdale School District West Fork School District Primary Point of Contact John C. Luther, Director Washington County Office of Emergency Management 2615 Brink Drive, Suite 104 Fayetteville, Arkansas 72701 479-444-1721 [email protected] Revised October 3, 2007 Revised January 8, 2008 Table of Contents Section 1. Introduction 1.1. General Description 1 1.2. Purpose and Authority 2 1.3. Community Information 4 1.3.1. Physiography, Climate, and Geology 4 1.3.2. Population and Demographics 7 1.3.3. Economy 27 1.3.4. Future Development 28 1.3.5. Capability Assessment 28 Section 2. Plan Adoption 2.1. Multi-Jurisdictional Plan Adoption 46 2.2. Points of Contact for Multi-Jurisdictions 50 Section 3. Planning Process 3.1. Multi-Jurisdictional Planning Participation 53 3.2. Documentation of the Planning Process 56 3.2.1 Planning Meeting Documentation 65 3.2.2 Household Natural Preparedness Questionnaire 77 3.2.3 Proof of Publication 102 Section 4. Risk Assessment 4.1. Hazard Identification 104 4.2. Profiling Hazards 110 4.2.1. Tornado Hazard Profile 111 4.2.2. Severe Winter Storm Hazard Profile 125 4.2.3. Flooding Hazard Profile 134 4.2.4. Earthquake Hazard Profile 151 4.2.5. Wildfire Hazard Profile 155 4.2.6. Landslide Hazard Profile 162 4.2.7. Expansive Soil Hazard Profile 166 4.2.8. Straight-Line Wind Hazard Profile 172 4.2.9. Drought Hazard Profile 217 4.2.10 Thunderstorm Hazard Profile 222 4.2.11 Hailstorm Hazard Profile 223 4.2.12 Extreme Heat Hazard Profile 229 4.2.13 Dam Failure Hazard Profile 233 4.3. Vulnerability Assessment 4.3.1. Assessing Vulnerability: Overview 239 4.3.1.1. Washington County Exposure Summary 239 4.3.1.2. Hazard Vulnerability Summary 239 4.3.1.3. Hazard Impact on Vulnerable Structures 242 4.3.2. Multi-Jurisdictional Risk Assessment 245 Washington County Hazard Mitigation Plan ii Section 5. Mitigation Strategy 5.1. Local Hazard Mitigation Goals 248 5.2. Identification and Analysis of Mitigation Actions 252 5.3. Implementation of Mitigation Actions 259 5.4. Multi-Jurisdictional Mitigation Actions 271 Section 6. Plan Maintenance Process 6.1. Monitoring, Evaluating, and Updating the Plan 274 6.2. Incorporating into Existing Planning Mechanisms 276 6.3. Continued Public Involvement 277 Appendices ATTACHMENT 1 – Plan Review and Prioritization ATTACHMENT 2 – Cooperative Agreements – Benton, Madison and Washington Counties (Assist in Emergency and Disaster Response Operations) Washington County Hazard Mitigation Plan iii Section 1: Introduction 1.1 General Description This Washington County Hazard Mitigation Plan (WCHMP) was created to protect the health, safety and economic interests of Washington County residents by reducing the risk of natural hazards. The plan provides a path toward continuous, proactive identification and reduction of vulnerability to the most frequent hazards that result in repetitive and often severe social, economic and physical damage. This plan provides a foundation for hazard mitigation activities within incorporated and unincorporated areas of Washington County, including the cities of Elkins, Elm Springs, Farmington, Fayetteville, Goshen, Greenland, Johnson, Lincoln, Prairie Grove, Springdale, Tontitown, West Fork and Winslow (hereinafter referred to as the municipalities of Washington County). This WCHMP is also established to fulfill federal, state, and local hazard mitigation planning requirements. The Disaster Mitigation Act of 2000 (DMA 2000), Section 322 (a-d) requires local governments to have an approved local mitigation plan in accordance with 44 CFR 201.6 as a condition of receiving future federal disaster mitigation funds. In the past, federal legislation has provided funding for disaster relief, recovery, and some hazard mitigation planning. The Disaster Mitigation Act of 2000 (DMA 2000) is the latest legislation to improve this planning process. DMA 2000 amended the Robert T. Stafford Disaster Relief and Emergency Assistance Act by repealing the previous Mitigation Planning section (409) and replacing it with a new Mitigation Planning section (322). This new section emphasizes the need for State, Tribal, and local entities to closely coordinate mitigation planning and implementation efforts. The new legislation reinforces the importance of mitigation planning and emphasizes planning for disasters before they occur. As such, this Act establishes a pre-disaster hazard mitigation program and new requirements for the national post-disaster Hazard Mitigation Grant Program (HMGP). It also requires that communities must have an approved hazard mitigation plan in order to receive Stafford Act assistance, excluding assistance provided pursuant to emergency provisions. Development and implementation of the Plan has been, and will be directed by the WCHMP Steering Committee, composed of the Executive Board of Washington County Emergency Services (LEPC). The Steering Committee has appointed a Planning Committee, composed of representatives of the municipalities and other stakeholders, to oversee formulation and maintenance of the WCHMP, and to coordinate action items between the involved municipalities. Washington County Emergency Services (WCES) is the agency tasked with supporting the Planning Committee in developing and maintaining the WCHMP. Implementing this Plan provides several benefits to Washington County and its residents and communities, including: Saving lives and protecting property Reducing vulnerability to future hazardous events Facilitating post-disaster funding for mitigation assistance Speeding recovery after a disaster Improving long-term community health Washington County Hazard Mitigation Plan 1 Involving the public in decision-making, and Demonstrating community support for emergency management and hazard mitigation. The Washington County Hazard Mitigation Plan is being developed to assess the ongoing natural hazard mitigation activities in Washington County, to evaluate additional mitigation measures that should be undertaken, and to outline a strategy for implementation of mitigation projects. This plan is multi-jurisdictional with a planning area that includes all of unincorporated Washington County and thirteen municipalities within the County including the City of Elkins, City of Elm Springs, City of Farmington, City of Fayetteville, City of Goshen, City of Greenland, City of Johnson, City of Lincoln, City of Prairie Grove, City of Springdale, City of Tontitown, City of West Fork, and City of Winslow. This plan also includes the eight School Districts located in Washington County including the Elkins School District, Farmington School District, Fayetteville School District, Greenland School District, Lincoln School District, Prairie Grove School District, Springdale School District, and West Fork School District. A map showing the locations of each of these jurisdictions within Washington County is in the Maps section of this report. Formal adoption and implementation of a hazard mitigation plan presents many benefits to Washington County and its residents. By identifying problems and possible solutions in advance of a disaster, Washington County and participating communities and school districts will be in a better position to obtain pre- and post-disaster funding. Specifically, the Disaster Mitigation Act of 2000 establishes a pre-disaster hazard mitigation program and new requirements for the national post-disaster Hazard Mitigation Grant Program (HMGP). It requires that states and communities have a FEMA approved hazard mitigation plan in place prior to receiving post- disaster HMGP funds. Adoption of this hazard mitigation strategy will also increase Washington County’s eligibility for assistance from FEMA’s Flood Mitigation Assistance (FMA) program. Washington County and participating communities will also gain additional credit points under FEMA’s Community Rating System (CRS) program, which provides discounts on National Flood Insurance Program (NFIP) flood insurance premiums for residents of communities that voluntarily participate in this program. Most importantly, Washington County will be able to recover faster and more wisely from a disaster. Through planning and acting on local mitigation strategies, the city will reduce vulnerability to disasters and identify opportunities for mitigation. In addition, the communities may meet comprehensive planning and other planning requirements and achieve community goals. 1.2. Purpose and Authority The purpose of the Washington County Hazard Mitigation Plan is to provide guidance for hazard mitigation activities in Washington County. The Washington County Office of Emergency Management has the responsibility to coordinate all local activities relating to hazard evaluation and mitigation and to prepare and submit to FEMA a Local Mitigation Plan following the criteria established in 44 CFR 201.4 and Section 322 of the Disaster Mitigation Act of 2000 (Public Law 106-390). The Disaster Mitigation Act of 2000 became law on October 30, 2000, and amends the Robert T. Stafford Disaster Relief and Emergency