TOWN OF SUNAPEE, NEW HAMPSHIRE HAZARD MITIGATION PLAN UPDATE 2016 M/V Kearsarge, Sunapee Harbor – January, 2013 Prepared by: Town of Sunapee 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 ................................................................................................................................................................................................... 7 II. COMMUNITY PROFILE ........................................................................................................................................................................................................ 8 A. INTRODUCTION .................................................................................................................................................................................................................. 8 B. DEVELOPMENT TRENDS ................................................................................................................................................................................................ 10 III. HAZARD IDENTIFICATION.......................................................................................................................................................................................... 13 A. WHAT ARE THE HAZARDS IN SUNAPEE? .................................................................................................................................................................... 13 B. DESCRIPTIONS OF HAZARDS ........................................................................................................................................................................................ 13 Dam Failure .............................................................................................................................................................................................................................. 14 Flooding .................................................................................................................................................................................................................................... 17 Hurricane .................................................................................................................................................................................................................................. 20 Tornado & Downburst .............................................................................................................................................................................................................. 23 Thunderstorms/Lightning/Hail .................................................................................................................................................................................................. 25 Severe Winter Weather .............................................................................................................................................................................................................. 28 Earthquake ................................................................................................................................................................................................................................ 32 Drought ..................................................................................................................................................................................................................................... 35 Extreme Heat............................................................................................................................................................................................................................. 37 Erosion/Landslide ..................................................................................................................................................................................................................... 39 Wildfire ..................................................................................................................................................................................................................................... 40 Natural Water & Air Contaminants .......................................................................................................................................................................................... 42 Hazardous Materials Spills ....................................................................................................................................................................................................... 45 Terrorism .................................................................................................................................................................................................................................. 46 C. HAZARD RISK RATINGS ................................................................................................................................................................................................. 46 Assessing Probability ................................................................................................................................................................................................................ 47 Assessing Vulnerability ............................................................................................................................................................................................................. 47 Assessing Risk ........................................................................................................................................................................................................................... 48 IV. CRITICAL FACILITIES/LOCATIONS ......................................................................................................................................................................... 50 V. DETERMINING HOW MUCH WILL BE AFFECTED .................................................................................................................................................... 52 A. IDENTIFYING VULNERABLE FACILITIES ................................................................................................................................................................... 52 B. IDENTIFYING VULNERABLE SPECIAL POPULATIONS ............................................................................................................................................ 53 C. POTENTIAL LOSS ESTIMATES ....................................................................................................................................................................................... 53 Dam Failure – Low/Medium – Unknown cost .......................................................................................................................................................................... 53 Flooding – Low/Medium Risk - $8.9 Million Estimated Cost (not including roads, bridges) .................................................................................................. 53 Hurricane – Medium Risk – $13.2 Million Estimated Cost ...................................................................................................................................................... 53 Tornado & Downburst –Medium Risk – No Recorded or Estimated Cost ................................................................................................................................ 54 Thunderstorm/Lightning/Hail – Low/Medium Risk – No Recorded or Estimated Cost ............................................................................................................ 54