BOROUGH OF NAUGATUCK NATURAL HAZARD PRE-DISASTER MITIGATION PLAN CENTRAL NAUGATUCK VALLEY REGIONAL PLANNING AREA FEBRUARY 2009 REVISED MARCH 2009 MMI #2937-02 Prepared For: Under a grant from the Federal Emergency Management Agency (FEMA) through the Connecticut Department of Environmental Protection (DEP) Council of Governments of the Central Naugatuck Valley 60 North Main Street, 3rd Floor Waterbury, Connecticut 06702-1403 Prepared By: MILONE & MACBROOM, INC. 99 Realty Drive Cheshire, Connecticut 06410 (203) 271-1773 www.miloneandmacbroom.com In Association With: Fitzgerald & Halliday 72 Cedar Street Hartford, Connecticut 06106 (860) 446-2102 www.fhiplan.com TABLE OF CONTENTS EXECUTIVE SUMMARY...........................................................................................ES-1 1.0 INTRODUCTION 1.1 Background and Purpose ................................................................................................. 1-1 1.2 Hazard Mitigation Goals.................................................................................................. 1-3 1.3 Identification of Hazards and Document Overview ........................................................ 1-5 1.4 Discussion of STAPLEE Ranking Method...................................................................... 1-7 1.5 Documentation of the Planning Process .......................................................................... 1-8 2.0 COMMUNITY PROFILE 2.1 Physical Setting................................................................................................................ 2-1 2.2 Existing Land Use............................................................................................................ 2-4 2.3 Geology............................................................................................................................ 2-6 2.4 Climate........................................................................................................................... 2-13 2.5 Drainage Basins and Hydrology .................................................................................... 2-14 2.6 Population and Demographic Setting ............................................................................ 2-18 2.7 Governmental Structure................................................................................................. 2-19 2.8 Development Trends...................................................................................................... 2-23 2.9 Critical Facilities and Sheltering Capacity .................................................................... 2-26 3.0 INLAND FLOODING 3.1 Setting .............................................................................................................................. 3-1 3.2 Hazard Assessment .......................................................................................................... 3-2 3.3 Historic Record................................................................................................................ 3-5 3.4 Existing Programs, Policies and Mitigation Measures .................................................... 3-8 3.5 Vulnerabilities and Risk Assessment............................................................................. 3-16 3.6 Potential Mitigation Measures, Strategies, and Alternatives......................................... 3-24 3.7 Summary of Recommended Mitigation Measures, Strategies, and Alternatives .......... 3-34 4.0 HURRICANES 4.1 Setting .............................................................................................................................. 4-1 4.2 Hazard Assessment .......................................................................................................... 4-1 4.3 Historic Record................................................................................................................ 4-6 4.4 Existing Programs, Policies, and Mitigation Measures ................................................... 4-9 4.5 Vulnerabilities and Risk Assessment............................................................................. 4-11 4.6 Potential Mitigation Measures, Strategies, and Alternatives......................................... 4-12 4.7 Summary of Recommended Mitigation Measures, Strategies, and Alternatives .......... 4-14 NATURAL HAZARD PRE-DISASTER MITIGATION PLAN NAUGATUCK, CONNECTICUT FEBRUARY 2009 ii TABLE OF CONTENTS (Continued) 5.0 SUMMER STORMS & TORNADOES 5.1 Setting .............................................................................................................................. 5-1 5.2 Hazard Assessment .......................................................................................................... 5-1 5.3 Historic Record................................................................................................................ 5-6 5.4 Existing Programs, Policies, and Mitigation Measures ................................................... 5-9 5.5 Vulnerabilities and Risk Assessment............................................................................. 5-11 5.6 Potential Mitigation Measures, Strategies, and Alternatives......................................... 5-12 5.7 Summary of Recommended Mitigation Measures, Strategies, and Alternatives .......... 5-13 6.0 WINTER STORMS 6.1 Setting .............................................................................................................................. 6-1 6.2 Hazard Assessment .......................................................................................................... 6-1 6.3 Historic Record................................................................................................................ 6-3 6.4 Existing Programs, Policies and Mitigation Measures .................................................... 6-7 6.5 Vulnerabilities and Risk Assessment............................................................................... 6-7 6.6 Potential Mitigation Measures, Strategies, and Alternatives........................................... 6-9 6.7 Summary of Recommended Mitigation Measures, Strategies, and Alternatives .......... 6-11 7.0 EARTHQUAKES 7.1 Setting .............................................................................................................................. 7-1 7.2 Hazard Assessment .......................................................................................................... 7-1 7.3 Historic Record................................................................................................................ 7-3 7.4 Existing Programs, Policies, and Mitigation Measures ................................................... 7-4 7.5 Vulnerabilities and Risk Assessment............................................................................... 7-5 7.6 Potential Mitigation Measures, Strategies, and Alternatives........................................... 7-8 8.0 DAM FAILURE 8.1 Setting .............................................................................................................................. 8-1 8.2 Hazard Assessment .......................................................................................................... 8-1 8.3 Historic Record................................................................................................................ 8-3 8.4 Existing Programs, Policies, and Mitigation Measures ................................................. 8-10 8.5 Vulnerabilities and Risk Assessment............................................................................. 8-11 8.6 Potential Mitigation Measures, Strategies, and Alternatives......................................... 8-16 NATURAL HAZARD PRE-DISASTER MITIGATION PLAN NAUGATUCK, CONNECTICUT FEBRUARY 2009 iii TABLE OF CONTENTS (Continued) 9.0 WILDFIRES 9.1 Setting .............................................................................................................................. 9-1 9.2 Hazard Assessment .......................................................................................................... 9-1 9.3 Historic Record................................................................................................................ 9-3 9.4 Existing Programs, Policies, and Mitigation Measures ................................................... 9-5 9.5 Vulnerabilities and Risk Assessment............................................................................... 9-6 9.6 Potential Mitigation Measures, Strategies, and Alternatives........................................... 9-9 10.0 RECOMMENDATIONS 10.1 Additional Recommendations........................................................................................ 10-1 10.2 Summary of Specific Recommendations....................................................................... 10-2 10.3 Sources of Funding ........................................................................................................ 10-7 11.0 PLAN IMPLEMENTATION 11.1 Implementation Strategy and Schedule ......................................................................... 11-1 11.2 Progress Monitoring and Public Participation ............................................................... 11-2 11.3 Updating the Plan........................................................................................................... 11-3 11.4 Technical and Financial Resources................................................................................ 11-4 12.0 REFERENCES 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