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2016 Hazard Mitigation Plan (Updated 2016)

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2016 Hazard Mitigation Plan (Updated 2016) City of Lebanon New Hampshire HAZARD MITIGATION PLAN Update 2016 Dulac Street and Slayton Hill Road, July 2013 Prepared by the City of Lebanon Hazard Mitigation Committee and Upper Valley Lake Sunapee Regional Planning Commission TABLE OF CONTENTS I. INTRODUCTION ..................................................................................................................................................................................................................... 1 A. BACKGROUND .................................................................................................................................................................................................................... 1 B. PURPOSE .............................................................................................................................................................................................................................. 1 C. HISTORY .............................................................................................................................................................................................................................. 1 D. SCOPE OF THE PLAN .......................................................................................................................................................................................................... 2 E. METHODOLOGY ................................................................................................................................................................................................................. 2 F. HAZARD MITIGATION GOALS......................................................................................................................................................................................... 5 G. ACKNOWLEDGEMENTS ................................................................................................................................................................................................... 6 II. COMMUNITY PROFILE ........................................................................................................................................................................................................ 7 A. INTRODUCTION .................................................................................................................................................................................................................. 7 Geographical Location and Information .................................................................................................................................................................................... 7 City Government Structure ......................................................................................................................................................................................................... 8 B. DEVELOPMENT TRENDS .................................................................................................................................................................................................. 9 III. HAZARD IDENTIFICATION.......................................................................................................................................................................................... 11 A. WHAT ARE THE HAZARDS IN LEBANON?................................................................................................................................................................... 11 B. DESCRIPTIONS OF HAZARDS ........................................................................................................................................................................................ 11 Dam Failure .............................................................................................................................................................................................................................. 12 Flooding .................................................................................................................................................................................................................................... 16 Hurricane .................................................................................................................................................................................................................................. 22 Tornado & Downburst .............................................................................................................................................................................................................. 25 Thunderstorms/Lightning/Hail .................................................................................................................................................................................................. 29 Severe Winter Weather .............................................................................................................................................................................................................. 32 Earthquake ................................................................................................................................................................................................................................ 37 Drought ..................................................................................................................................................................................................................................... 39 Extreme Heat............................................................................................................................................................................................................................. 41 Erosion ...................................................................................................................................................................................................................................... 43 Landslide ................................................................................................................................................................................................................................... 44 Wildfire ..................................................................................................................................................................................................................................... 45 Natural Water & Air Contaminants .......................................................................................................................................................................................... 47 Hazardous Materials Spills ....................................................................................................................................................................................................... 50 Terrorism .................................................................................................................................................................................................................................. 51 C. HAZARD RISK RATINGS ................................................................................................................................................................................................. 52 Assessing Probability ................................................................................................................................................................................................................ 52 Assessing Vulnerability ............................................................................................................................................................................................................. 52 Assessing Risk ........................................................................................................................................................................................................................... 53 IV. CRITICAL FACILITIES/LOCATIONS ......................................................................................................................................................................... 56 V. DETERMINING HOW MUCH WILL BE AFFECTED .................................................................................................................................................... 59 A. IDENTIFYING VULNERABLE FACILITIES ................................................................................................................................................................... 59 B. IDENTIFYING VULNERABLE SPECIAL POPULATIONS ............................................................................................................................................ 60 C. POTENTIAL LOSS ESTIMATES ....................................................................................................................................................................................... 60 Dam Failure – Low-Medium Risk - $65 Million Estimated Cost .............................................................................................................................................. 60 Flooding – Medium-High Risk - $42 Million Estimated Cost ..................................................................................................................................................
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