Hazard Mitigation Plan
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HAZARD MITIGATION PLAN City of Concord, New Hampshire As contained in the Fire Museum’s Scrapbooks As contained in the Fire Museum’s Scrapbooks Adopted by the Concord City Council December 11, 2006 HAZARD MITIGATION PLAN City of Concord, New Hampshire December 11, 2006 City of Concord 41 Green Street Concord, New Hampshire 03301 Phone: (603) 225-8570 Fire Department Administration Phone: (603) 225-8650 Web: www.onconcord.com Central New Hampshire Regional Planning Commission 28 Commercial Street Concord, New Hampshire 03301 Phone: (603) 226-6020 Web: www.cnhrpc.org New Hampshire Bureau of Emergency Management 107 Pleasant Street Concord, New Hampshire 03301 Phone: (800) 852-3792 Web: www.nh.gov/safety/divisions/emergservices/bem US Department of Homeland Security Federal Emergency Management Agency 99 High Street, Sixth Floor Boston, Massachusetts 02110 Phone: (617) 223-9540 Web: www.fema.gov Concord, NH Hazard Mitigation Plan TABLE OF CONTENTS Certificate of Adoption ..................................................................................... v Acknowledgements .......................................................................................... vi Executive Summary ......................................................................................... vii Chapter 1. Introduction ................................................................................... 1 Background ........................................................................................... 1 Goals .................................................................................................. 2 Methodology .......................................................................................... 2 Chapter 2. Hazard Identification ........................................................................ 4 Natural Hazard Events in Concord ................................................................ 4 Technological Hazard Events in Concord ......................................................... 35 Human Hazard Events in Concord ................................................................. 51 Map of Potential Hazards ........................................................................... 63 Map of Past Hazards ................................................................................. 63 Chapter 3. Asset and Risk Identification ............................................................... 64 Critical Facilities..................................................................................... 64 Vulnerable Populations ............................................................................. 73 Economic Assets ..................................................................................... 79 Special Considerations .............................................................................. 81 Historic/Other Considerations ..................................................................... 88 Future Development ................................................................................ 92 Homes within the Floodplain ...................................................................... 93 Evacuation Routes ................................................................................... 93 Traffic Analysis ....................................................................................... 94 Maps of Asset and Risk Identification ............................................................. 97 Chapter 4. Potential Losses ............................................................................... 98 Loss Estimation ...................................................................................... 99 Losses by Flooding ................................................................................... 100 Losses by Other Natural Hazards .................................................................. 107 Losses by Technological Hazards .................................................................. 113 Losses by Human Hazards .......................................................................... 119 Maps of Potential Hazards and Losses ............................................................ 122 Chapter 5. Development Trends ......................................................................... 123 Population and Housing Growth ................................................................... 123 Land Use .............................................................................................. 124 Relation to Natural and Non-Natural Hazards ................................................... 127 Page i Adopted 12/11/06 Concord, NH Hazard Mitigation Plan Chapter 6. Floodplain Management ..................................................................... 133 Flooding in Concord ................................................................................. 133 National Flood Insurance Program (NFIP) ........................................................ 134 Repetitive Loss Properties.......................................................................... 135 Floodplain Management Goals/Reducing Flood Risks ........................................... 136 Chapter 7. Local Hazard Mitigation Objectives ...................................................... 139 General Objectives .................................................................................. 140 Hazard-Specific Objectives......................................................................... 140 Chapter 8. Existing Mitigation Strategies .............................................................. 141 Description of Existing Mitigation Strategies .................................................... 141 Chapter 9. Newly Identified Mitigation Actions ........................................................ 150 Description of Potential Mitigation Actions ...................................................... 150 Chapter 10. Evaluation and Implementation of Actions ............................................. 166 Concord‟s Mitigation Action Plan .................................................................. 167 Cost to Benefit Analysis ............................................................................. 195 Chapter 11. Plan Monitoring, Evaluating, and Updating ............................................. 197 Maintenance and Update Schedule of the Hazard Mitigation Plan ........................... 197 Implementation Through Existing Programs ..................................................... 199 Continued Public Involvement ..................................................................... 200 Chapter 12. Appendix ...................................................................................... 201 Process for Disaster Declaration in Concord ..................................................... 201 Grant Programs for Disaster Relief ................................................................ 205 Action Evaluation and Prioritization Matrices of the Mitigation Planning Task Force ..... 207 Photos of Natural Disasters in Concord ........................................................... 212 Glossary of Terms.................................................................................... 229 Letters of Support ................................................................................... 232 Publicity and Meeting Information for Concord 2006 Hazard Mitigation Plan .............. 232 Page ii Adopted 12/11/06 Concord, NH Hazard Mitigation Plan List of Tables Table 1 – Significant Area Annual Events.................................................................. 61 Table 1A – Significant Local Annual Events ............................................................... 62 Table 2 – Essential City Facilities .......................................................................... 64 Table 2A – Essential Governmental Facilities ............................................................ 65 Table 2B – Transportation Facilities ....................................................................... 65 Table 2C – Utilities ........................................................................................... 66 Table 2D – Communication Facilities ...................................................................... 67 Table 2E – Dams .............................................................................................. 68 Table 2F – Bridges ............................................................................................ 70 Table 2G – Medical Facilities................................................................................ 72 Table 3 – Schools ............................................................................................. 73 Table 3A – Multi-Unit Housing .............................................................................. 74 Table 3B – Manufactured Housing Parks ................................................................... 75 Table 3C – Congregate Care Facilities ..................................................................... 76 Table 3D – Child Care Facilities ............................................................................ 77 Table 3E – Public Assistance Facilities..................................................................... 78 Table 4 – Economic Assets ................................................................................... 79 Table 5 – Churches ........................................................................................... 81 Table 5A –