DRAFT Town of Shandaken Flood Mitigation Plan May, 2019 Prepared by: Tetra Tech, Inc. 6 Century Drive, 3rd Floor Parsippany, NJ 07054 TABLE OF CONTENTS Table of Contents SECTION 1 INTRODUCTION .............................................................................................................. 1-1 1.1 WHY PREPARE THIS PLAN? ........................................................................................................ 1-1 1.2 GUIDELINES FOR FLOOD PLANNING ....................................................................................... 1-1 1.2.1 CRS STEPS FOR COMPREHENSIVE FLOODPLAIN MANAGEMENT PLAN .................... 1-2 1.3 BACKGROUND............................................................................................................................... 1-2 1.3.1 CRS Origins .................................................................................................................................. 1-2 1.3.2 Organizations Involved in the Mitigation Planning Effort ............................................................ 1-3 1.3.3 Multiple Agency Support for Hazard Mitigation .......................................................................... 1-3 1.3.4 IMPLEMENTATION OF THE PLANNING PROCESS ............................................................ 1-4 1.3.5 Benefits of Mitigation Planning .................................................................................................... 1-5 1.3.6 Benefits of Participating in the Community Rating System ......................................................... 1-5 1.3.7 How to Use this Plan ..................................................................................................................... 1-6 SECTION 2 PLANNING PROCESS...................................................................................................... 2-1 2.1 INTRODUCTION............................................................................................................................. 2-1 2.2 FORMATION OF A PLANNING TEAM-ORGANIZE THE RESOURCES ................................. 2-1 2.3 DEFINING THE PLANNING AREA .............................................................................................. 2-2 2.3.1 Planning Committee and Other Stakeholder Support ................................................................... 2-3 2.3.2 Early Planning Efforts ................................................................................................................... 2-3 2.3.3 Planning Committee Involvement and Efforts .............................................................................. 2-3 2.3.4 Stakeholders Involved in Mitigation Planning .............................................................................. 2-6 2.3.5 Municipal and Local Involvement ................................................................................................ 2-6 2.3.6 Coordination with Other Agencies- Federal, State, County, and Regional Agency Involvement 2-7 2.3.7 PUBLIC INVOLVEMENT .......................................................................................................... 2-8 2.4 Integration of Existing Data and Plans into Mitigation Plan ........................................................... 2-10 2.4.1 Local Data ................................................................................................................................... 2-11 2.4.2 Federal and State Data ................................................................................................................ 2-11 2.4.3 Other Plans, Reports, and Data ................................................................................................... 2-11 2.5 CONTINUED PUBLIC INVOLVEMENT .................................................................................... 2-13 SECTION 3 TOWN PROFILE ............................................................................................................... 3-1 3.1 GENERAL INFORMATION ........................................................................................................... 3-1 3.1.1 Physical Setting ............................................................................................................................. 3-1 3.2 POPULATION AND DEMOGRAPHICS ...................................................................................... 3-10 3.3 Economy ......................................................................................................................................... 3-16 Flood Mitigation Plan –Town of Shandaken, New York i May 2019 TABLE OF CONTENTS 3.4 GENERAL BUILDING STOCK .................................................................................................... 3-18 3.5 LAND USE AND POPULATION TRENDS ................................................................................. 3-20 3.5.1 Land Use Trends ......................................................................................................................... 3-20 3.5.2 Population Trends ....................................................................................................................... 3-20 3.5.3 Future Growth and Development ................................................................................................ 3-21 3.6 Critical Facilities ............................................................................................................................. 3-21 3.6.1 Essential Facilities ...................................................................................................................... 3-22 3.6.2 Transportation Systems ............................................................................................................... 3-25 3.6.3 Lifeline Utility Systems .............................................................................................................. 3-27 3.6.4 High-Potential Loss Facilities ..................................................................................................... 3-29 SECTION 4 RELEVANT PROGRAMS AND REGULATIONS ........................................................ 4-1 4.1 Federal Plans ..................................................................................................................................... 4-1 4.1.1 DISASTER MITIGATION ACT OF 2000 ................................................................................... 4-1 4.2 State Plans AND RESOURCES ....................................................................................................... 4-8 4.3 Local Plans and Ordinances ............................................................................................................ 4-11 SECTION 5 RISK ASSESSMENT ......................................................................................................... 5-1 5.1 Hazard Profile ................................................................................................................................... 5-1 5.1.1 General Concepts .......................................................................................................................... 5-1 5.1.2 Principal Types of Flooding the Town of Shandaken ................................................................... 5-2 5.1.3 Major Flood Events ....................................................................................................................... 5-4 5.1.4 Location ...................................................................................................................................... 5-13 5.1.5 Frequency .................................................................................................................................... 5-19 5.1.6 Severity ....................................................................................................................................... 5-19 5.1.7 Warning Time ............................................................................................................................. 5-21 5.1.8 Secondary Hazards ...................................................................................................................... 5-22 5.1.9 Future Trends .............................................................................................................................. 5-23 5.1.10 Scenario .................................................................................................................................. 5-24 5.1.11 Challenges, Data Gaps, and Issues ......................................................................................... 5-24 5.2 Vulnerability Assessment ................................................................................................................ 5-25 5.2.1 Overview of Vulnerability .......................................................................................................... 5-25 5.2.2 Data and Methodology ................................................................................................................ 5-25 5.2.3 Impact on Life, Health and Safety .............................................................................................. 5-27 5.2.4 Impact on General Building Stock .............................................................................................. 5-32 5.2.5 Impact on Critical Facilities ........................................................................................................ 5-40 5.2.6 Impact on the Economy 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