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Tama County Hazard Mitigation Planning Process

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Tama County Hazard Mitigation Planning Process EnS Tama County, Iowa Hazard Mitigation Plan 2015 - 2020 Executive Summary Submittal Date: October 20, 2015 Approval Date: October 26, 2015 Update Deadline: TBD Plan Prepared By: Region 6 Planning Commission 903 E Main Street Marshalltown, IA 50158 Table of Contents This is a multi-jurisdictional multi-hazard plan written in accordance with the Code of Federal Regulation, Plan Author: Title 44, Part 201 pending FEMA approval. Julie Whitson, Planner Table of Contents Executive Summary ................................................................................................................................................................ 3 Prerequisites ............................................................................................................................................................................. 5 Chapter 1: Introduction ........................................................................................................................................................ 9 Chapter 2: Hazard Mitigation Planning Process ....................................................................................................... 13 Chapter 3: Planning Area ................................................................................................................................................... 26 3.1: Planning Area Profile .............................................................................................................................................. 26 3.2: Jurisdiction Descriptions and Capabilities .................................................................................................... 56 Chapter 4: Risk Assessment .............................................................................................................................................. 99 4.1: Hazard Identification .............................................................................................................................................. 99 4.2: Hazard Profiles and Risk Assessment .......................................................................................................... 122 4.3: Vulnerability Assessment .................................................................................................................................. 179 4.3.1: Vulnerability ................................................................................................................................................... 180 4.3.2: Community Assets ........................................................................................................................................ 231 4.3.3: Repetitive Loss Properties ........................................................................................................................ 274 Chapter 5: Mitigation Strategy ...................................................................................................................................... 276 5.1: Goals, Mitigation Actions, and Evaluation .................................................................................................. 276 Chapter 6: Plan Maintenance Process ........................................................................................................................ 343 6.1: Monitoring, Evaluating, and Updating the Plan ........................................................................................ 343 6.2: Incorporation into Existing Planning Mechanisms ................................................................................. 345 6.3: Continued Public Involvement ........................................................................................................................ 345 Chapter 7: Recommendations ....................................................................................................................................... 346 Appendix A: Tama County Meeting Minutes .......................................................................................................... 347 Appendix B: Action Updates........................................................................................................................................... 350 Appendix C: Examples of Public Notification .......................................................................................................... 360 Appendix D. Flash Flood Maps ..................................................................................................................................... 361 Appendix E. Tama County Floodplain Maps ............................................................................................................ 367 Appendix F. City of Chelsea, Iowa and Tama County Historic River Flooding News Articles ............ 376 Appendix G. Tama County Historic Weather and Hazardous Materials Data ......................................... 381 Appendix G. List of Levees Within 75 Miles of Tama County ........................................................................... 399 Appendix I. Fixed Hazardous Materials Hazard Areas ....................................................................................... 401 Appendix J. Pipeline Hazard Areas ............................................................................................................................. 414 Appendix K. Rail Transportation Hazard Areas .................................................................................................... 422 Appendix L. Special Flood Hazard Areas ................................................................................................................. 426 Appendix M. Dam Hazard Areas in Tama County ................................................................................................ 439 Appendix O. Grass and Wildland Fire Hazard Areas ........................................................................................... 441 Appendix P. Results of Mitigation Action Prioritization .................................................................................... 454 Appendix Q. Resolutions ................................................................................................................................................. 465 Appendix R: Data Sources Used in Plan .................................................................................................................... 466 2 Executive Summary This multi-jurisdictional hazard mitigation plan is being submitted to FEMA by the Region 6 Planning Commission in Marshalltown, Iowa on behalf of one of its four jurisdictional counties, Tama County. This plan defines hazards - “any source of danger that threatens humans, property, and the environment” (FEMA 385-2/August 2001, Page iii) - and hazard mitigation planning - a proactive approach to prepare individual Tama County jurisdictions for hazards that could affect them. The entire mitigation process is outlined including the steps of organizing community resources, risk assessment and mitigation strategy, writing the plan, community comment period, submitting the plan, plan approval and adoption, and finally plan implementation by jurisdictions and counties. Background work and research was completed to produce a profile of the entire planning area – Tama County. Information including location, demographics, housing, transportation, and economic conditions gives a statistically detailed depiction of the planning area. Similar data is presented for the individual jurisdictions of Tama County, along with even more detailed information of the area including local government, services provided, resources employed, and previous mitigation efforts taken at the city level. Profiles for the four school districts are also included in the planning area. In the Risk Assessment chapter, every hazard that could possibly affect Tama County is identified and profiled with the information of its description, historical occurrence, probability, vulnerability, severity of impact, and speed of onset included. Based on the frequency and/or impact of each of these descriptors, the hazards are scored according to which hazards pose the largest threat to Tama County. A mitigation strategy is produced by each jurisdiction and takes into account their risk assessment and vulnerability to hazards to create goals with subsequent projects to help reach those goals. Some of the most popular goals include minimizing losses to structures, protecting the health and safety of residents, educating citizens of the dangers of hazards and continuing the operations of the jurisdictions and county without disruption during a hazard. Projects identified to help achieve those goals include the installation of safe rooms, purchase of generators for critical facilities, elevation of roads, and the creation of emergency contact sheets and procedures. Projects are evaluated and ranked to set their priority to each community using several evaluation criteria. This plan identifies individual jurisdiction’s assets and vulnerable populations in order to gauge what/who needs priority when a hazard strikes. City facilities and grocery stores, and elderly and disabled populations are the most frequently identified as critical facilities and vulnerable populations. All of these exercises helped Region 6 have a better idea as to the need of each jurisdiction. 3 Much progress has been made for the communities of Tama County during the previous planning process as they removed structures from the floodplain, installed
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