CATTARAUGUS COUNTY Multi-Jurisdictional Hazard Mitigation Plan Prepared For: Cattaraugus County 303 Court Street Little Valley, NY 14755 Prepared By: Cattaraugus County Department of Public Works 8810 Route 242 Little Valley, NY 14755 and Cattaraugus County Department of Emergency Services 303 Court Street Little Valley, NY 14755 August 2006 TABLE OF CONTENTS 1.0 Executive Summary ............................................................................................................ 1 2.0 Plan Initiation - Cattaraugus County Multi-Jurisdictional Planning Process................ 2 2.1 Geographic Scope of the Mitigation Plan ............................................................ 3 2.2 The Planning Team................................................................................................. 3 2.3 Guidance Group and Project Group Meetings .................................................... 4 2.4 Involving the Public................................................................................................ 7 3.0 Introduction to Cattaraugus County.................................................................................. 7 3.1 Demographics......................................................................................................... 7 3.2 Geographic Review .............................................................................................. 11 3.3 Major Water Bodies.............................................................................................. 13 3.3.1 Allegany River Drainage Basin ........................................................... 14 3.3.2 Allegany River Sub drainage Basin.................................................... 14 3.3.3 Cattaraugus Creek Drainage Basin .................................................... 15 3.3.4 Cattaraugus Creek Sub Drainage Basins .......................................... 15 3.4 Soils ....................................................................................................................... 15 4.0 Natural Hazard Risk Assessment and Vulnerability Analysis and Loss Estimation.. 21 4.1 Local Jurisdiction Priorities ................................................................................ 22 4.2 The Cattaraugus County Comprehensive Emergency Management Plan ..... 25 4.3 Cattaraugus County Emergency Operations Guidelines................................. 26 4.4 NCDC Database .................................................................................................... 26 4.5 Federal Disasters.................................................................................................. 27 4.6 Natural Hazard Identification Summary ............................................................. 30 4.7 Natural Hazard Profiles / Vulnerability and Loss Estimation........................... 30 4.7.1 Ice Storms ............................................................................................. 32 4.7.2 Severe Storms/Wind Storms/Hurricane Remnants........................... 33 4.7.3 Floods (Including Flash Floods .......................................................... 39 4.7.4 Winter Storms....................................................................................... 46 4.7.5 Wildfire/Fire/Drought............................................................................ 49 4.7.6 Tornado ................................................................................................. 54 4.7.7 Ice Jam .................................................................................................. 57 4.7.8 Dam Failure ........................................................................................... 58 4.7.9 Earthquake............................................................................................ 61 4.7.10 Landslide............................................................................................. 64 4.7.11 Land Subsidence................................................................................ 66 4.8 Community Profile................................................................................................ 67 4.8.1 Critical Facilities................................................................................... 67 4.8.2 Population Data .................................................................................... 70 4.8.3 Future Growth....................................................................................... 70 4.9 Vulnerability Analysis and Loss Estimation Summary .................................... 70 5.0 Mitigation Plan ................................................................................................................... 71 5.1 Hazard Mitigation Goals....................................................................................... 71 5.2 Cattaraugus County Hazard Mitigation Vision .................................................. 71 5.3 Problem Statements, Goals, and Alternate Action Items................................. 72 5.3.1 High Priority Natural Hazards ............................................................. 72 5.3.2 Medium Priority Natural Hazards........................................................ 78 5.3.3 Low Priority Natural Hazards .............................................................. 79 5.3.4 Common Hazards................................................................................. 83 5.4 State and Local Mitigation Capabilities.............................................................. 84 5.5 Mitigation Implementation Strategy ................................................................... 85 5.6 Mitigation Plan Adoption ..................................................................................... 85 5.7 Mitigation Plan Monitoring .................................................................................. 86 5.8 Mitigation Plan Evaluation................................................................................... 86 5.9 Mitigation Plan Update......................................................................................... 86 6.0 Plan Maintenance Process .............................................................................................. 87 6.1 Protect Life and Property..................................................................................... 87 6.2 Public Awareness................................................................................................. 88 6.3 Natural Systems ................................................................................................... 88 6.4 Partnerships and Implementation ...................................................................... 88 6.5 Emergency Services ............................................................................................ 88 Cattaraugus County, New York ii Multi-Jurisdiction Hazard Mitigation Plan Final 08/16/06 List of Tables Table 1 Summary of Plan Development Collaberation .............................................................................. 6 Table 2 Cattaraugus County Population..................................................................................................... 7 Table 3 Cattaraugus County Population by Municipality........................................................................... 8 Table 4 Federal Declared Storm Events ................................................................................................... 28 Table 5 HAZNY Planning/Review Attendees.......................................................................................... 31 Table 6 Estimated Value of Structures Located within Floodplain.......................................................... 42 Table 7 Critical Facilities Located within the Floodplain ........................................................................ 43 Table 8 NFIP Insurance Report with Estimated Values of Structures by Percent of Coverage ............... 45 Table 9 Fujita Tornado Scale.................................................................................................................... 54 Table 10 Magnitude of Reported Tornadoes .............................................................................................. 55 Table 11 Dams in Cattaraugus County....................................................................................................... 59 Table 12 Critical Facilities in Cattaraugus County..................................................................................... 68 Table 13 Vulnerability Analysis and Loss Estimation Summary............................................................... 71 List of Figures Figure 1 Population Data............................................................................................................................ 9 Figure 2 Geographic Scope ...................................................................................................................... 12 Figure 3 Drainage Basins, Watersheds, and Dams................................................................................... 13 Figure 4 Soil Drainage.............................................................................................................................. 19 Figure 5 Soil by Hydrological Group ....................................................................................................... 20 Figure 6 Removed .................................................................................................................................... 22 Figure