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Draft Bennington Hazard Mitigation Plan July 2017 with Maps

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Draft Bennington Hazard Mitigation Plan July 2017 with Maps Draft Town of Bennington Hazard Mitigation Plan July 17, 2017 Bennington, Vermont Town of Bennington Resolution of Adoption A Resolution Adopting the Town of Bennington Hazard Mitigation Plan ____________ ___, 2017 Whereas, the Town of Bennington has worked with the Bennington County Regional Commission to identify hazards, analyze past and potential future losses due to natural disasters, and identify strategies for mitigating future losses; and Whereas, the respective officials identified in the mitigation action plan are hereby directed to pursue implementation of the recommended actions assigned to them, assuming funding is available; and Whereas, a duly noticed public meeting was held by the Town of Bennington Select Board on ____________ ___, 2017 to formally adopt the Town of Bennington Hazard Mitigation Plan; Now, therefore be it resolved that the Town of Bennington hereby adopts the Town of Bennington Hazard Mitigation Plan. ____________________ ____________________ Select Board Chair Select Board ____________________ ____________________ Select Board Select Board ____________________ Select Board ____________________ Select Board ____________________ Select Board Table of Contents List of Tables ............................................................................................ 2 List of Figures .......................................................................................... 3 I. Introduction ................................................................................. 4 A. Purpose ............................................................................................................................................ 4 B. Mitigation Goals ............................................................................................................................... 4 II. Town Profile ................................................................................ 5 A. Regional Context .............................................................................................................................. 5 B. Demography and Land Use .............................................................................................................. 5 C. Economic and Cultural Resources .................................................................................................... 6 D. Critical Facilities ............................................................................................................................... 7 III. Planning Process .......................................................................... 8 A. Planning Team .................................................................................................................................. 8 B. Public Involvement ........................................................................................................................... 9 C. Hazard Assessment .......................................................................................................................... 9 IV. Hazard Assessment ................................................................... 11 A. Flooding and Fluvial Erosion .......................................................................................................... 11 B. Winter Storms ................................................................................................................................ 20 C. High Wind Events ........................................................................................................................... 25 D. Hail ................................................................................................................................................. 30 E. Temperature Extremes .................................................................................................................. 32 F. Drought .......................................................................................................................................... 34 G. Wildfire .......................................................................................................................................... 35 H. Earthquake ..................................................................................................................................... 37 I. Landslide ........................................................................................................................................ 40 J. Invasive Species ............................................................................................................................. 41 K. Hazardous Material Spill ................................................................................................................ 44 L. Water Supply ................................................................................................................................. 45 M. Infectious Disease Outbreak ......................................................................................................... 46 V. Vulnerability Assessment .......................................................... 48 A. Prioritization of Hazards ................................................................................................................. 48 B. List of Priority Hazards ................................................................................................................... 48 VI. Mitigation Measures ................................................................. 50 A. Hazard Mitigation Goals ................................................................................................................. 50 B. 2005 Hazard Mitigation Plan .......................................................................................................... 50 C. Town Plan ....................................................................................................................................... 52 D. State and Regional Plans and Programs ......................................................................................... 53 F. Town Capabilities ........................................................................................................................... 57 G. Mitigation Actions .......................................................................................................................... 61 VII. Plan Maintenance ...................................................................... 68 A. Annual Monitoring and Continued Public Involvement ................................................................. 68 B. Plan Evaluation and Update ........................................................................................................... 68 C. Post Disaster Review and Revision ................................................................................................. 69 VIII. References ................................................................................. 70 A. Literature and Reports ................................................................................................................... 70 B. Map Data Sources .......................................................................................................................... 74 C. Personal Communication Sources .................................................................................................. 75 List of Tables Table 1. Number of properties by classification ......................................................................................... 6 Table 2. Bennington Critical Facilities. ......................................................................................................... 7 Table 3. Planning team members ................................................................................................................ 8 Table 4. Dates of planning meetings and public and agency review ........................................................... 9 Table 5. Total number of flood events by type and year for Bennington County ..................................... 13 Table 6. Months where rainfall exceeded the 90th percentile (precipitation totals, in inches, in parentheses) of monthly precipitation at the Peru, Pownal and Sunderland Cooperative Observer Stations from 1990 to 2013. ...................................................................................................................... 18 Table 7. Structures by type in flood hazard areas in Bennington, VT. ....................................................... 20 Table 8. Total number of winter storm events by type and year for Bennington County ......................... 21 Table 9. Summary of wind events in Bennington County .......................................................................... 26 Table 10. Pownal normal temperatures and precipitation for 1981 to 2010. ........................................... 33 Table 11. Years and number of months when the PHDI indicated severe or extreme droughts from 1985 to 2015 ....................................................................................................................................................... 34 Table 12. Wildland fire size classes ............................................................................................................ 36 Table 13. Earthquake Magnitude and intensity scale descriptions ........................................................... 38 Table 14. Earthquakes in Vermont ...........................................................................................................
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