CATTARAUGUS COUNTY Multi-Jurisdictional Hazard Mitigation Plan Cattaraugus County 303 Court Street Little Valley, NY 14755 Prepared By: Cattaraugus County Departments of Public Works; Economic Development, Planning and Tourism; Real Property/GIS; and Emergency Services August – 2013 TABLE OF CONTENTS 1.0 Executive Summary ............................................................................................................ 1 2.0 Plan Initiation - Cattaraugus County Multi-Jurisdictional Planning Process ................ 3 2.1 Geographic Scope of the Mitigation Plan ......................................................................... 4 2.2 The Planning Team .............................................................................................................. 4 2.3 Guidance Group and Project Group Meetings ................................................................. 5 2.4 Involving the Public ........................................................................................................... 10 3.0 Introduction to Cattaraugus County ................................................................................ 10 3.1 Demographics .................................................................................................................... 10 3.2 Geographic Review ........................................................................................................... 16 3.3 Watersheds ........................................................................................................................ 18 3.3.1 Upper Allegheny Watershed ......................................................................................... 19 3.3.2 Upper Allegheny Subwatersheds ................................................................................. 19 3.3.3 Cattaraugus Watershed ................................................................................................. 20 3.3.4 Cattaraugus Subwatersheds ......................................................................................... 20 3.4 Soils .................................................................................................................................... 20 4.0 Natural Hazard Risk Assessment and Vulnerability Analysis and Loss Estimation .. 26 4.1 Local Jurisdiction Priorities ............................................................................................. 27 4.2 The Cattaraugus County Comprehensive Emergency Management Plan .................. 33 4.3 Cattaraugus County Emergency Operations Guidelines .............................................. 34 4.4 NCDC Database ................................................................................................................. 34 4.5 Federal Disasters ............................................................................................................... 35 4.6 Natural Hazard Identification Summary .......................................................................... 39 4.7 Natural Hazard Profiles / Vulnerability and Loss Estimation ........................................ 39 4.7.1 Winter Storms ................................................................................................................. 40 4.7.2 Floods (Including Flash Floods .................................................................................... 43 4.7.3 Severe Storms/Wind Storms/Hurricane Remnants ..................................................... 51 4.7.4 Ice Storms ....................................................................................................................... 53 4.7.5 Tornado ........................................................................................................................... 54 4.7.6 Wildfire ............................................................................................................................. 62 4.7.7 Landslide ......................................................................................................................... 65 4.7.8 Dam Failure ..................................................................................................................... 68 4.8 Community Profile ............................................................................................................. 73 4.8.1 Critical Facilities ............................................................................................................. 73 4.8.2 Population Data .............................................................................................................. 76 4.8.3 Future Growth ................................................................................................................. 77 4.9 Vulnerability Analysis and Loss Estimation Summary ................................................. 79 5.0 Mitigation Plan ................................................................................................................... 80 5.1 Problem Statements, Goals, and Alternate Action Items .............................................. 80 5.2 Completed Mitigation Actions .......................................................................................... 91 5.3 State and Local Mitigation Capabilities ........................................................................... 91 5.4 Mitigation Implementation Strategy ................................................................................ 92 5.5 Mitigation Plan Adoption .................................................................................................. 93 5.6 Mitigation Plan Monitoring ............................................................................................... 93 5.7 Mitigation Plan Evaluation ................................................................................................ 94 5.8 Mitigation Plan Update ...................................................................................................... 94 6.0 Plan Maintenance Process ............................................................................................... 94 6.1 Protect Life and Property .................................................................................................. 95 6.2 Public Awareness .............................................................................................................. 95 6.3 Natural Systems ................................................................................................................ 95 6.4 Partnerships and Implementation ................................................................................... 96 6.5 Emergency Services ......................................................................................................... 96 List of Tables Table 1- Summary of Plan Development Collaboration ................................................................................ 9 Table 2- Total Population, Housing - Units, Land Area, and Population Density........................................ 11 Table 3- Cattaraugus County Population Projections ................................................................................... 13 Table 4 - Cattaraugus County Population by Municipality .......................................................................... 14 Table 5 - List of Declared Disasters ............................................................................................................. 35 Table 6 - Declared Disaster Costs by Municipality ...................................................................................... 36 Table 7 - Structure Value of Parcels in Floodplain ...................................................................................... 45 Table 8 - Estimated Value of Structures on Parcels with Rooftops in Floodplains ...................................... 47 Table 9 - Critical Facilities Located in Floodplain ....................................................................................... 48 Table 10 – NFIP Insurance Report vs Estimated Value ............................................................................... 50 Table 11 - Enhanced Fujita Scale ................................................................................................................. 55 Table 12 - Cattaraugus County Tornadoes ................................................................................................... 56 Table 13 - Major Dams in Cattaraugus County ............................................................................................ 70 Table 14 - Small Dams in Cattaraugus County ............................................................................................ 71 Table 15 – Critical Facilities in Cattaraugus County .................................................................................... 74 Table 16 - Critical Facilities in the Floodplain ............................................................................................. 75 Table 17 - Vulnerability and Loss Estimation .............................................................................................. 79 List of Figures Figure 1 – Population Data from 2010 Census ............................................................................................. 15 Figure 2 - Geographic Boundaries ................................................................................................................ 17 Figure 3 - Cattaraugus County Watersheds .................................................................................................