Washington County Hazard Mitigation Plan 2012
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WASHINGTON COUNTY MULTI-JURISDICTIONAL HAZARD MITIGATION PLAN 2012 CREATED FOR THE JURISDICTIONS OF: WASHINGTON COUNTY, AINSWORTH, BRIGHTON CRAWFORDSVILLE, KALONA, WASHINGTON AND WEST CHESTER Created by the East Central Iowa Council of Governments 700 16th Street NE, Suite 301 Cedar Rapids, IA 52402 Phone: 319-365-9941 Fax: 319-365-9981 PLAN ORGANIZATION The Washington County Multi-Jurisdictional Hazard Mitigation Plan is organized into seven sections: Introduction, Prerequisite, Planning Process, Risk Assessment, Mitigation Strategy, and Plan Maintenance. These sections are consistent with the multi-hazard mitigation planning guidance issued by the Federal Emergency Management Agency (FEMA), the Iowa Department of Homeland Security and Emergency Management, and the Iowa Hazard Mitigation Plan of 2007 and 2010. The plan sections and primary subsections are shown in the table of contents to follow: TABLE OF CONTENTS Chapter 1 Introduction ........................................................................ 1-1 Notification of Neighboring Entities ................................................ 3-7 Executive Summary .............................................................................. 1-3 Review of Existing Plans and Studies ............................................... 3-7 Community Profile ............................................................................... 1-4 Chapter 4 Risk Assessment .................................................................. 4-1 Location ........................................................................................... 1-4 Identifying Hazards .............................................................................. 4-2 Development Patterns .................................................................... 1-9 Assessing Vulnerability ......................................................................... 4-5 Chapter 2 Pre-Requisites ......................................................................... 1 Overview ......................................................................................... 4-5 NFIP Participation................................................................................. 2-2 Identifying Structures ...................................................................... 4-8 Multi-Jurisdictional Plan Adoption .......................................................... 2 Profiling Hazards ................................................................................ 4-11 Chapter 3 Planning Process .................................................................. 3-1 Results ................................................................................................ 4-13 Documentation of the Planning Process .............................................. 3-2 Chapter 5 Mitigation Strategy .............................................................. 5-1 Acknowledgements .............................................................................. 3-2 Local Hazard Mitigation Goals .............................................................. 5-2 Ainsworth ........................................................................................ 3-2 Identification and Analysis of Mitigation Actions ................................. 5-4 Brighton .......................................................................................... 3-2 Implementation of Mitigation Actions ................................................. 5-6 Crawfordsville ................................................................................. 3-2 Prioritization of Mitigation Actions ................................................. 5-6 Kalona ............................................................................................. 3-2 Mitigation Action Steps ................................................................... 5-8 Washington ..................................................................................... 3-3 Multi-Jurisdictional Mitigation Actions .............................................. 5-46 West Chester ................................................................................... 3-3 Action Items .................................................................................. 5-46 Washington County ......................................................................... 3-3 Chapter 6 Plan Maintenance ................................................................ 6-1 Background .......................................................................................... 3-3 Monitoring, Evaluating, and Updating The Plan ................................... 6-2 Scope ............................................................................................... 3-3 Incorporation into Existing Planning Methods ..................................... 6-3 Authority ......................................................................................... 3-3 Continued Public Involvement ............................................................. 6-3 Funding ........................................................................................... 3-4 Chapter 7 Appendices .......................................................................... 7-1 Purpose ........................................................................................... 3-4 Appendix 1: Resolutions of Adoption ................................................... 7-2 Process ................................................................................................. 3-5 Appendix 2: Historical Events Tables .................................................... 7-9 Public Involvement .......................................................................... 3-7 Appendix 3: Glossary of Terms ........................................................... 7-20 TABLE OF FIGURES Figure 1: Location ...................................................................................... 1-4 Figure 14: Ainsworth in 1930 and 2009 .................................................. 1-16 Figure 2: Washington County .................................................................... 1-5 Figure 15: Ainsworth Population Change, 1960-2010 ............................. 1-16 Figure 3: Land Use ..................................................................................... 1-6 Figure 16: Ainsworth Critical Facilities .................................................... 1-18 Figure 4: Ainsworth Land Use.................................................................... 1-7 Figure 17: Brighton in 1930 and 2009 ..................................................... 1-19 Figure 5: Brighton Land Use ...................................................................... 1-7 Figure 18: Brighton Population Change, 1960-2010................................ 1-19 Figure 6: Crawfordsville Land Use ............................................................. 1-7 Figure 19: Brighton Critical Facilities ....................................................... 1-21 Figure 7: Kalona Land Use ......................................................................... 1-8 Figure 20: Crawfordsville in 1930 and 2009 ............................................ 1-22 Figure 8: Washington Land Use ................................................................. 1-8 Figure 21: Crawfordsville Population Change, 1960-2010 ...................... 1-22 Figure 9: West Chester Land Use .............................................................. 1-8 Figure 22: Crawfordsville Critical Facilities .............................................. 1-24 Figure 10: Washington County Population Change, 1960-2010 .............. 1-10 Figure 23: Kalona in 1930 and 2009 ........................................................ 1-25 Figure 11: Washington County Critical Facilities ..................................... 1-13 Figure 24: Kalona Population Change, 1960-2010 .................................. 1-25 Figure 12: Conservation Board Sites ....................................................... 1-14 Figure 25: Kalona Critical Facilities .......................................................... 1-27 Figure 13: School Districts ....................................................................... 1-15 Figure 26: Washington in 1930 and 2009 ................................................ 1-28 Figure 27: Washington Population Change 1960-2010 ........................... 1-28 Figure 62: West Chester Preliminary FIRM 2010 ..................................... 4-49 Figure 28: Washington Critical Facilities .................................................. 1-30 Figure 63: West Chester FIRM ................................................................. 4-49 Figure 29: West Chester in 1930 and 2009 ............................................. 1-31 Figure 64: 12-Digit HUC Watersheds ....................................................... 4-50 Figure 30: West Chester Critical Facilities ............................................... 1-33 Figure 65: Ainsworth HUC-12 Watersheds .............................................. 4-51 Figure 31: Ainsworth Flood Insurance Rate Map ...................................... 2-2 Figure 66: Brighton HUC-12 Watersheds ................................................ 4-51 Figure 32: Number of Reported Droughts in Iowa .................................. 4-22 Figure 67: Crawfordsville HUC-12 Watershed ......................................... 4-52 Figure 33: Iowa Seismic Zones ................................................................ 4-25 Figure 68: