HAZARD MITIGATION PLAN 2019 GEORGETOWN COUNTY CITY OF GEORGETOWN TOWN OF ANDREWS TOWN OF PAWLEYS ISLAND Photographs (left to right, top to bottom): Hurricane Hugo 1989, https://www.ssec.wisc.edu/mcidas/gallery-historical/hurricaneimages.html Severe Flooding Event, Georgetown County, October 2015 Andrews 2002 Tornado: En.wikipedia.org Charleston Earthquake 1886: Charleston Museum Wildfires: California Conservation Center Severe Storms/Hail/Wind: wallsave.com Winter Storm Pax, Andrews Santee North Dam: web.ftc-i.net Drought in SC: archive.wltx.com Georgetown Sinkhole 2011: https://thesinkhole.org/ Sea Level Rise: plan.risingsea.net/statewide/sc_statewide TABLE OF CONTENTS Table of Contents Table of Contents ....................................................................................................................................... i List of Tables and Figures ..................................................................................................................... iii Record of Changes .................................................................................................................................... v Executive Summary ............................................................................................................................... vii Acronyms ................................................................................................................................................... xi Section 1: Introduction, Purpose, Organization, and Background Information ....................... 1-1 1.1 Introduction ...............................................................................................................................................1-1 1.2 Purpose ....................................................................................................................................................1-1 1.3 Existing Hazard Mitigation Programs ....................................................................................................1-2 1.3.1 Critical Facilities ..........................................................................................................................1-3 1.3.2 Weather Warning Devices .........................................................................................................1-3 1.3.3 StormReady / TsunamiReady ...................................................................................................1-3 1.3.4 Firewise Communities ................................................................................................................1-5 1.4 Organization of the Plan ...........................................................................................................................1-5 1.5 Background Information on Georgetown County ................................................................................1-5 NFIP Compliance Information ..........................................................................................................................1-9 Section 2: Planning Process ................................................................................................................. 2-1 2.1 Committee Organization ..........................................................................................................................2-1 2.1.1 Steering Committee ....................................................................................................................2-1 2.1.2 Mitigation Planning Committee ................................................................................................2-8 2.2 Public Involvement .................................................................................................................................2-14 2.3 Coordination with Other Agencies and Organizations .....................................................................2-15 2.4 Assess the Hazards..................................................................................................................................2-17 2.5 Assess the Problems ................................................................................................................................2-18 2.5.1 Hurricane/Tropical Storm .......................................................................................................2-19 2.5.2 Flood ...........................................................................................................................................2-23 2.5.3 Tornado ......................................................................................................................................2-24 2.5.4 Earthquake .................................................................................................................................2-26 2.5.5 Wildfire .......................................................................................................................................2-27 2.5.6 Drought ......................................................................................................................................2-27 2.5.7 Severe Storms/Hail/Wind Events .........................................................................................2-28 2.5.8 Winter Storm ..............................................................................................................................2-28 2.5.9 Dam Failure ...............................................................................................................................2-28 2.5.10 Sinkholes ....................................................................................................................................2-29 2.5.11 Sea Level Rise ............................................................................................................................2-30 2.5.12 Infrastructure Vulnerability .....................................................................................................2-35 2.5.12.1 Hurricane/Tropical Storm.........................................................................................2-35 2.5.12.2 Flood .............................................................................................................................2-36 2.5.12.3 Tornado ........................................................................................................................2-36 2.5.12.4 Earthquake ...................................................................................................................2-36 2.5.12.5 Wildfire ........................................................................................................................2-38 Georgetown County HMP September 2019 i TABLE OF CONTENTS 2.5.12.6 Drought ........................................................................................................................2-38 2.5.12.7 Severe Storms/Hail/Wind Events ...........................................................................2-38 2.5.12.8 Winter Storm ...............................................................................................................2-38 2.5.12.9 Dam Failure .................................................................................................................2-38 2.5.12.10 Sinkholes .................................................................................................................2-38 2.5.12.11 Sea Level Rise .........................................................................................................2-38 2.5.13 Critical Facility Analysis ..........................................................................................................2-39 Section 3: Mitigation Strategy ............................................................................................................. 3-1 3.1 Introduction ...............................................................................................................................................3-1 3.2 Georgetown County Hazard Mitigation Goals .....................................................................................3-3 3.3 Mitigation Objectives ................................................................................................................................3-3 3.4 Mitigation Actions .....................................................................................................................................3-5 3.4.1 Available Mitigation Techniques ..............................................................................................3-5 3.4.2 Mitigation Techniques for Georgetown County .....................................................................3-7 3.5 Georgetown County Mitigation Actions ..............................................................................................3-11 3.6 Town of Andrews Mitigation Actions ..................................................................................................3-51 3.7 Town of Pawleys Island Mitigation Actions ........................................................................................3-59 3.8 City of Georgetown Mitigation Actions ...............................................................................................3-91 Section 4: Resolutions ........................................................................................................................... 4-1 Appendix A: Georgetown County Hazard Assessment .................................................................. A-1 Appendix B: Community