Town of Springfield, New Hampshire Hazard Mitigation Plan Update 2013 Town of Springfield Upper Valley Hazard Mitigation Lake Sunapee Regional Committee Planning Commission Golf Course Road before and after Tropical Storm Irene, August 2011 Town Farm Road, before and after Tropical Storm Irene, August 2011 stone bridge on Kidder Brook at Twin Lake Villa before and after Tropical Storm Irene, August 2011 Twin Lake Villa Golf course before and after Tropical Storm Irene, August 2011 Springfield Hazard Mitigation Plan Update 2013 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 ........................................................................................................................................................................................................ 8 A. INTRODUCTION .................................................................................................................................................................................................................. 8 B. DEVELOPMENT TRENDS ................................................................................................................................................................................................ 10 III. HAZARD IDENTIFICATION.......................................................................................................................................................................................... 12 A. WHAT ARE THE HAZARDS IN SPRINGFIELD? ............................................................................................................................................................ 12 B. DESCRIPTIONS OF HAZARDS ........................................................................................................................................................................................ 12 Dam Failure .............................................................................................................................................................................................................................. 13 Flooding .................................................................................................................................................................................................................................... 15 Hurricane .................................................................................................................................................................................................................................. 20 Tornado & Downburst .............................................................................................................................................................................................................. 23 Thunderstorms .......................................................................................................................................................................................................................... 24 Severe Winter Weather .............................................................................................................................................................................................................. 25 Earthquake ................................................................................................................................................................................................................................ 29 Landslide ................................................................................................................................................................................................................................... 30 Drought ..................................................................................................................................................................................................................................... 31 Extreme Heat............................................................................................................................................................................................................................. 32 Erosion ...................................................................................................................................................................................................................................... 33 Wildfire ..................................................................................................................................................................................................................................... 34 Natural Water & Air Contaminants .......................................................................................................................................................................................... 35 Hazardous Materials Spills ....................................................................................................................................................................................................... 37 Terrorism .................................................................................................................................................................................................................................. 38 Public Health and Biohazard .................................................................................................................................................................................................... 38 C. HAZARD RISK RATINGS ................................................................................................................................................................................................. 39 Assessing Probability ................................................................................................................................................................................................................ 39 Assessing Vulnerability ............................................................................................................................................................................................................. 40 Assessing Risk ........................................................................................................................................................................................................................... 41 IV. CRITICAL FACILITIES/LOCATIONS ......................................................................................................................................................................... 43 Springfield Hazard Mitigation Plan Update 2013 V. DETERMINING HOW MUCH WILL BE AFFECTED .................................................................................................................................................... 45 A. IDENTIFYING VULNERABLE FACILITIES ................................................................................................................................................................... 45 B. IDENTIFYING VULNERABLE SPECIAL POPULATIONS ............................................................................................................................................ 46 C. POTENTIAL LOSS ESTIMATES ....................................................................................................................................................................................... 46 Dam Failure – Low Risk - $0 Estimated Cost ..........................................................................................................................................................................