2017 Hazard Mitigation Plan Update – Coventry, Ri
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2017 HAZARD MITIGATION PLAN UPDATE – COVENTRY, RI 2017 Hazard Mitigation Plan Update Town of Coventry, Rhode Island PREPARED FOR Town of Coventry, RI Town Hall 1670 Flat River Road Coventry, RI 02816 401-821-6400 PREPARED BY 101 Walnut Street PO Box 9151 Watertown, MA 02471 617.924.1770 MAY 2017 2017 Hazard Mitigation Plan Update – Coventry, RI This Page Intentionally Left Blank. 2017 Hazard Mitigation Plan Update – Coventry, RI Table of Contents Executive Summary ........................................................................................................................................... 1 Introduction ........................................................................................................................................................ 2 Plan Purpose .................................................................................................................................................................................. 2 Hazard Mitigation and Benefits .............................................................................................................................................. 2 Goals.................................................................................................................................................................................................. 4 Background .................................................................................................................................................................................... 5 History .................................................................................................................................................................................. 5 Demographics ................................................................................................................................................................... 6 Government ....................................................................................................................................................................... 6 Land Use Patterns ............................................................................................................................................................ 7 Public Safety ...................................................................................................................................................................... 7 Roads and Bridges .......................................................................................................................................................... 8 Utilities ................................................................................................................................................................................. 8 Forest and Open Space ................................................................................................................................................. 9 Water Resources .............................................................................................................................................................. 9 Cultural and Historic Resources ................................................................................................................................. 9 Development Trends Since the 2010 Plan .......................................................................................................... 10 Planning Process ..............................................................................................................................................11 Overview ....................................................................................................................................................................................... 11 Coventry Hazard Mitigation Plan Committee ................................................................................................................ 11 The Planning Process ............................................................................................................................................................... 12 Public Input.................................................................................................................................................................................. 14 Natural Hazards ...............................................................................................................................................16 Hazards of Concern .................................................................................................................................................................. 16 High Winds ...................................................................................................................................................................... 19 Dam Failure ..................................................................................................................................................................... 23 Flooding (Riverine and Urban/Street) .................................................................................................................. 24 Hurricanes (Tropical Cyclones) ................................................................................................................................ 29 Nor’easter ........................................................................................................................................................................ 33 Ice Storm .......................................................................................................................................................................... 34 Snow Storm ..................................................................................................................................................................... 37 Hail ..................................................................................................................................................................................... 40 Lightning .......................................................................................................................................................................... 41 Brushfire ........................................................................................................................................................................... 43 Drought ............................................................................................................................................................................ 45 Extreme Temperatures ............................................................................................................................................... 48 Tornadoes ........................................................................................................................................................................ 50 i Table of Contents 2017 Hazard Mitigation Plan Update – Coventry, RI Earthquake ...................................................................................................................................................................... 52 Climate Change.......................................................................................................................................................................... 56 Risk Assessment ...............................................................................................................................................57 Facilities Inventory .................................................................................................................................................................... 57 Hazard Mitigation Mapping ................................................................................................................................................. 58 Fiscal Impact Analysis .............................................................................................................................................................. 58 Built Environment ...................................................................................................................................................................... 61 Population Impact Analysis ................................................................................................................................................... 62 Natural Environment ................................................................................................................................................................ 63 Vulnerability of Future Structures ....................................................................................................................................... 63 Community Assets Matrix ...................................................................................................................................................... 64 Programmatic Capabilities .............................................................................................................................68 Purpose ......................................................................................................................................................................................... 68 Primary Plans, Regulations, and Departments .............................................................................................................. 68