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City of League City CITY OF DICKINSON MITIGATION PLAN CITY OF DICKINSON 07/2017 City of Dickinson Office of Emergency Management 4000 Liggio St Dickinson TX 775393 281-337-4700 TABLE OF CONTENTS Introduction........................................................................................................................................ 1 Authority .....................................................................................................................................1-2 Purpose and Need ........................................................................................................................... 2 Scope ............................................................................................................................................. 2 Section I The Planning Process ....................................................................................................... 3 Overview of the Plan Update ........................................................................................................3-4 Mitigation Planning Committee (MPC) ............................................................................................4-5 Public Participation .......................................................................................................................... 6 Announcement of Hazard Mitigation Survey ...................................................................................... 7 Hazard Mitigation Survey Form ................................................................................................... 8-11 Results of Survey ………………………………………………………………………………………………………………..12-14 Involvement from Partner Agencies................................................................................................ 15 Review and Incorporation of Plans, Studies, Reports and Other Information ..................................... 15 Section 2 Hazard Identification and Risk Assessment ..................................................................... 16 Overview of Hazards ..................................................................................................................... 16 Hazard Vulnerability ................................................................................................................. 16-18 Overview of Hazards ..................................................................................................................... 19 Critical Facilities ....................................................................................................................... 20-21 Hurricanes/Tropical Storms ....................................................................................................... 22-41 Flood Events ............................................................................................................................ 42-64 Severe Thunderstorms -- Includes High Wind, Lightning, and Hail .............................................. 65-75 Tornado .................................................................................................................................. 75-80 Extreme Heat .......................................................................................................................... 80-84 Section 3 Mitigation Strategy ........................................................................................................ 85 Mitigation Goals ....................................................................................................................... 85-86 Benefit-Cost Review ...................................................................................................................... 86 Section 4 Plan Maintenance Procedures ......................................................................................... 87 Monitoring, Updating and Evaluating the Plan ............................................................................ 87-89 Adoption ...................................................................................................................................... 90 Section 5 Plan Adoption ............................................................................................................... 91 Appendix .......................................................................................................................................... 92 City of Dickinson Mitigation Plan Introduction The City of Dickinson undertook the development of the 2005 Hazard Assessment and Mitigation Plan as a requirement associated with eligibility for specific grant assistance programs through FEMA. In accordance with 44 Code of Federal Regulations (CFR) 201.6(d)(3), “A local jurisdiction must review and revise its plan to reflect changes in development, progress in local mitigation efforts, and changes in priorities, and re-submit it for approval within five years in order to continue to be eligible for mitigation project grant funding.” The 2010 Plan review and update entailed a complete re-evaluation and update of all sections of the Plan, and reflected conditions that have changed since the completion of the 2005 Plan. The 2017 Plan review is an evaluation of the information in the 2010 plan and an update of all changes in development and growth that have occurred in the city. Most significant change to the plan was the City of Dickinson developing an independent plan absent of the County of Galveston plan. Which allows this plan to become more robust due to population changes and city specific annexations of extra-territorial jurisdiction. These changes have no significant changes in vulnerabilities to hazards. There has also been no changes to the priorities as demonstrated in previous plans. Authority “Disasters occur when the risk area population adopts patterns of land use, building construction, and economic activity that are vulnerable to the physical impacts of extreme events in the physical environment, such as tornadoes or floods”. (Kathleen J. Tierney, et al., Facing the Unexpected: Disaster Preparedness and Response in the United States, 2001, pg. 12). As defined by the Federal Emergency Management Agency (FEMA), mitigation refers to any sustained action taken to reduce or eliminate long-term risk to people and property from hazards and their effects. Hazard mitigation planning is the process through which natural hazards that threaten the community are identified, likely impacts of those hazards are determined, mitigation goals are defined, and appropriate strategies that would lessen the impacts are prioritized and implemented. The Disaster Mitigation Act of 2000 (DMA 2000), is the latest legislation that reinforces the importance of mitigation planning and emphasizes planning for disasters before they occur. As such, DMA 2000 establishes a pre-disaster hazard mitigation program and new requirements for the national post-disaster Hazard Mitigation Grant Program (HMGP). Section 322 of DMA 2000 specifically addresses mitigation planning at the state and local levels. Section 322 identifies new requirements that allow HMGP funds to be used for planning activities, and increases the amount of HMGP funds available to states that have developed a comprehensive, enhanced mitigation plan prior to a disaster. States, tribes, and communities must have an approved mitigation plan in place before receiving HMGP funds. Local mitigation plans must demonstrate that their proposed mitigation actions are based on a sound planning process that accounts for the risk to and the capabilities of the individual communities. DMA 2000 is intended to facilitate cooperation between state and local authorities. It encourages and rewards local, tribal, and state pre-disaster planning and promotes sustainability as a strategy for disaster resistance. City of Dickinson Mitigation Plan 1 This Plan update is specific to the City of Dickinson, and will reflect conditions which have changed since the 2010 Mitigation Plan. The plan will comply with all requirements as promulgated by the Texas Division of Emergency Management (TDEM), and all applicable provisions of the Robert T. Stafford Disaster Relief and Emergency Assistance Act, Section 104 of the DMA 2000 (P.L. 106-390), the Bunning- Bereuter-Blumenauer Flood Insurance Reform Act of 2004 (P.L. 108-264), which amended the National Flood Insurance Act (NFIA) of 1968 (42 U.S.C. 4001, et al). The update process also followed the FEMA guidance document titled Local Mitigation Plan Review Guide (2011), which is the source for defining the requirements for the original and updated local mitigation plans as found in 44 CFR §201. The 2011 Hazard Analysis and Mitigation Plan entailed a review of the 2007 Plan, and resulted in an update of the 2011 document. Review of the 2010 City of Dickinson Local Mitigation Plan entailed a process to review and update the following data: • Census data • Demographic data • Weather events • FEMA floodplain maps • Long-range drainage plan • Thoroughfare plan • Drought contingency plan • Pipeline map development Purpose and Need Each year, natural disasters kill hundreds of people and injure thousands more throughout the United States. Taxpayers pay billions of dollars annually to help communities, organizations, businesses and individuals recover from disasters. These monies only partially reflect the true cost of disasters, because additional expenses to insurance companies and non-governmental organizations are not reimbursed by tax dollars. Many natural disasters are predictable, often with the same
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