Village of Manchester Hazard Mitigation Plan , 2017 Village of Manchester, Vermont Table of Contents List of Tables ................................................................................................................................................. 2 List of Figures ................................................................................................................................................ 2 I. Introduction .......................................................................................................................................... 3 A. Purpose ............................................................................................................................................. 3 B. Mitigation Goals ................................................................................................................................ 3 II. Village Profile ........................................................................................................................................ 4 A. Regional Context ............................................................................................................................... 4 B. Demography and Land Use ............................................................................................................... 4 C. Economic and Cultural Resources ..................................................................................................... 4 D. Critical Facilities ................................................................................................................................ 5 III. Planning Process ................................................................................................................................... 5 A. Planning Team ................................................................................................................................... 5 B. Public Involvement............................................................................................................................ 6 C. Hazard Assessment ........................................................................................................................... 6 IV. Hazard Assessment ............................................................................................................................... 8 A. Flooding and Fluvial Erosion ............................................................................................................. 8 B. Winter Storms ................................................................................................................................. 13 C. High Wind Events ............................................................................................................................ 16 D. Hail .................................................................................................................................................. 19 E. Temperature Extremes ................................................................................................................... 20 F. Drought ........................................................................................................................................... 21 G. Wildfire............................................................................................................................................ 22 H. Earthquake ...................................................................................................................................... 24 I. Landslide ......................................................................................................................................... 26 J. Invasive Species .............................................................................................................................. 27 K. Hazardous Material Spill ................................................................................................................. 29 V. Vulnerability Assessment .................................................................................................................... 34 A. Prioritization of Hazards ................................................................................................................. 34 B. Priority Hazards ............................................................................................................................... 34 VI. Mitigation Measures ........................................................................................................................... 35 A. Hazard Mitigation Goals.................................................................................................................. 35 B. 2005 Hazard Mitigation Plan ........................................................................................................... 36 C. Village Plan of Development ........................................................................................................... 37 D. State and Regional Plans and Programs ......................................................................................... 37 E. Current Programs Supporting Mitigation ....................................................................................... 39 F. Village Capabilities .......................................................................................................................... 39 G. Mitigation Actions ........................................................................................................................... 43 VII. Plan Maintenance ............................................................................................................................... 51 A. Annual Monitoring and Continued Public Involvement ................................................................. 51 B. Plan Evaluation and Update ............................................................................................................ 51 C. Post Disaster Review and Revision ................................................................................................. 52 VIII. References .......................................................................................................................................... 53 A. Literature and Reports .................................................................................................................... 53 B. Map Data Sources ........................................................................................................................... 55 C. Personal Communication Sources .................................................................................................. 56 List of Tables Table 1. Number of properties by classification. .......................................................................................... 4 Table 2. Manchester Critical Facilities. ......................................................................................................... 5 Table 3. Planning Commission members ...................................................................................................... 6 Table 4. Dates of planning meetings and public and agency review ............................................................ 6 Table 5. Total number of flood events by type and year for Bennington County. ....................................... 9 Table 6. Months where rainfall exceeded the 90th percentile .................................................................... 11 Table 7. Structures by type in flood hazard zones in the Village of Manchester, VT. ................................ 13 Table 8. Total number of winter storm events by type and year for Bennington County. ........................ 13 Table 9. Summary of wind events in Bennington County. .......................................................................... 17 Table 10. Sunderland normal temperatures and precipitation for 1981 to 2010. ..................................... 20 Table 11. Years and number of months when the PHDI indicated severe or extreme droughts. .............. 21 Table 12. Wildland fire size classes. ............................................................................................................ 23 Table 13. Earthquakes in Vermont. ............................................................................................................ 24 Table 14. Landslide and debris flow types. ................................................................................................. 27 Table 15. Designated Class B noxious weeds in Vermont. ......................................................................... 28 Table 16. Aquatic invasive species in Vermont. .......................................................................................... 28 Table 19. Vulnerability assessment. ........................................................................................................... 35 Table 21. Comparison of Vermont vs. Village of Manchester Hazard Mitigation Plans ............................. 37 Table 22. Capabilities of the Village of Manchester ................................................................................... 40 Table 23. Ranking of mitigation actions ...................................................................................................... 43 Table 24. Mitigation Actions. .....................................................................................................................