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City of Brigantine Floodplain Management Plan

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City of Brigantine Floodplain Management Plan City of Brigantine Floodplain Management Plan Prepared By Rutala Associates Adopted February 19, 2020 Brigantine Floodplain Management Plan 1 | P a g e Rutala Associates Table of Contents Executive Summary.............................................................................................................................................. 6 PART 1 — PLANNING PROCESS AND PROJECT BACKGROUND ...................................................... 12 CHAPTER 1 - INTRODUCTION .................................................................................................................. 12 1.1 Background and History .............................................................................................................. 12 1.2 Why Prepare a Floodplain Management Plan......................................................................... 13 1.3 Previous Floodplain Management Plans ................................................................................... 13 1.4 The Brigantine Floodplain Management Plan ........................................................................ 13 CHAPTER 2 – PLAN DEVELOPMENT METHODOLOGY ................................................................... 15 2.1 Formation of the Planning Team ................................................................................................. 15 2.2 Defining the Planning Area ............................................................................................................ 15 2.3 Establishing the Floodplain Management Committee ......................................................... 15 2.4 Coordination with Other Agencies .............................................................................................. 19 2.5 Review of Existing Plans ................................................................................................................. 19 2.6 Public Involvement............................................................................................................................ 19 2.7 Revising Program for Public Information ......................................................................... 22 2.8 Plan Development Chronology/Milestones .......................................................................... 22 CHAPTER 3 – CITY OF BRIGANTINE PROFILE ................................................................................... 23 3.1 Overview ............................................................................................................................................ 23 3.2 Documented Damage from Superstorm Sandy ................................................................... 24 3.3 Funding Assistance Provided ..................................................................................................... 27 CHAPTER 4 – RELEVANT PROGRAMS AND REGULATION ........................................................... 30 4.1 Federal Assistance ............................................................................................................................. 30 4.2 State Coastal Engineering Project/Shore Protection Program ..................................... 34 4.3 Local Flood Protection Efforts ................................................................................................... 35 CHAPTER 5 – PLANNING COORDINATION AND PUBLIC OUTREACH ...................................... 40 PART 2 – FLOOD HAZARD ASSESSMENT ................................................................................................. 46 CHAPTER 6 – HAZARD ASSESSMENT ................................................................................................... 46 CHAPTER 7 – FLOOD HAZARD PROFILE .............................................................................................. 47 7.1 General Concepts ............................................................................................................................... 47 7.2 Flooding Types ................................................................................................................................. 52 7.3 Principal Flooding Sources .......................................................................................................... 53 CHAPTER 8 – HISTORIC FLOODING DAMAGE ................................................................................... 54 Historic and Future Damage Estimates ................................................................................................ 56 CHAPTER 9 – FLOOD HAZARD VULNERABILITIES ......................................................................... 60 9.1 Flood Hazard Exposure ................................................................................................................... 60 9.2 Flood Hazard Vulnerabilities ......................................................................................................... 77 CHAPTER 10 – CLIMATE CHANGE CONSIDERATIONS FOR FLOODPLAIN MANAGEMENT ............................................................................................................................................................................... 81 10.1 What is climate change?................................................................................................................ 81 10.2 How Climate Change Affects Floodplain Management ..................................................... 81 10.3 Current Global Indications of Climate Change ..................................................................... 82 10.4 Projected Future Impacts ............................................................................................................. 82 Brigantine Floodplain Management Plan 2 | P a g e Rutala Associates PART 3 – MITIGATION STRATEGY .............................................................................................................. 88 CHAPTER 11 – GUIDING PRICIPLE, GOALS AND OBJECTIVES .................................................... 88 CHAPTER 12 – MITIGATION INITIATIVES .......................................................................................... 90 12.1 Alternatives Analysis ................................................................................................................ 90 12.2 Completed Initiatives ................................................................................................................ 92 Chapter 13: ACTION PLAN AND PLANNED INITIATVES ............................................................. 102 13.1 Prioritized Actions ........................................................................................................................ 102 13.2 Post-Disaster Mitigation Policies and Procedures ........................................................... 109 CHAPTER 14 – PLAN ADOPTION .......................................................................................................... 110 CHAPTER 15 – PLAN MAINTENANCE STRATEGY .......................................................................... 111 15.1 Implementing the Plan ................................................................................................................ 111 15.2 Monitoring, Evaluating and Updating the Plan .................................................................. 111 15.3 Maintaining Public Involvement ............................................................................................. 113 15.4 Incorporating the Plan into other Mechanisms ................................................................. 113 15.5 Funding Options ....................................................................................................................... 114 References .......................................................................................................................................................... 119 Appendices ......................................................................................................................................................... 122 Table of Figures Figure 1: Floodplain Management Plan Steps ........................................................................................... 8 Figure 2: Enabling Resolution ....................................................................................................................... 17 Figure 3: Civilian Labor Force in Atlantic City-Hammonton MSA, 1990-2019 .......................... 26 Figure 4: Unemployment Rate in Atlantic County, 1990-2019 ........................................................ 27 Figure 5: Home Being Elevated in the Golf Course Section of Brigantine .................................... 28 Figure 6: President Obama Tours Brigantine after Sandy ................................................................. 29 Figure 7: Projected NFIP Annual Flood Insurance Premiums for V Zone and A Zone Properties with $250,000 Residential Building Coverage ................................................................. 31 Figure 8: Summary of Plans and Ordinances for the City of Brigantine ....................................... 35 Figure 9: Brigantine Projects Identified in the Atlantic County Flood Control Study ............. 38 Figure 10: Table of Contacts .......................................................................................................................... 40 Figure 11: Range of Elevations for Brigantine (Feet NAVD 88) ....................................................... 47 Figure 12: Value of NFIP Losses ..................................................................................................................
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