CITY OF BUENA PARK LOCAL HAZARD MITIGATION PLAN DRAFT March 2017 This page is deliberately blank LOCAL HAZARD MITIGATION PLAN BASIC PLAN Table of Contents Credits ........................................................................................................................ 4 Part I: BACKGROUND .............................................................................. 6 Executive Summary .................................................................................................. 6 Mitigation Planning Benefits ................................................................................................ 6 Hazards and Land-Use Policy in California ......................................................................... 7 Support for Hazard Mitigation ............................................................................................. 7 How is the Plan Organized? ................................................................................................ 8 City of Buena Park and Hazard Mitigation ........................................................................... 9 Mitigation Planning Process ...............................................................................................11 Plan Review .......................................................................................................................11 Plan Adoption ....................................................................................................................12 Plan Approval ....................................................................................................................12 Point of Contact .................................................................................................................12 Plan Maintenance ..............................................................................................................12 Section 1: Introduction ............................................................................................ 13 Why Develop a Mitigation Plan? ........................................................................................13 Why Plan for Hazards? ......................................................................................................14 Hazard Mitigation Legislation .............................................................................................14 State and Federal Support .................................................................................................16 Hazards U.S. – Multi-Hazard .............................................................................................17 Who Does the Mitigation Plan Affect? ................................................................................18 Section 2: Community Profile ................................................................................. 20 Geography and the Environment .......................................................................................20 History ...............................................................................................................................20 Climate ..............................................................................................................................21 Population and Demographics ...........................................................................................22 Employment and Industry ..................................................................................................23 Transportation and Commuting Patterns ............................................................................25 Part II: HAZARD ANALYSIS .................................................................... 27 Section 3: Risk Assessment ................................................................................... 27 What is a Risk Assessment? ..............................................................................................27 Critical and Essential Facilities ...........................................................................................31 Land and Development ......................................................................................................31 Key Focus Areas for Growth ..............................................................................................32 Summary ...........................................................................................................................32 Section 4: Earthquake Hazards .............................................................................. 34 Earthquake Characteristics ................................................................................................34 Measuring and Describing Earthquakes .............................................................................35 Regulatory Background .....................................................................................................37 Historical Earthquakes in Orange County ..........................................................................38 Local Hazard Mitigation Plan | March 15, 2017 Page 1 of 161 LOCAL HAZARD MITIGATION PLAN BASIC PLAN Previous Occurrences of Earthquakes in the City of Buena Park .......................................39 Earthquake Hazard Assessment ........................................................................................39 Impact of Earthquakes in the City of Buena Park ...............................................................43 Earthquake-Related Hazards .............................................................................................44 Risk Analysis .....................................................................................................................53 Community Earthquake Issues ..........................................................................................53 Existing Mitigation Activities ...............................................................................................57 Section 5: Flood Hazards ........................................................................................ 60 Flood Risk Factors .............................................................................................................60 Flood Terminology .............................................................................................................61 Types of Flooding ..............................................................................................................62 Severity ..............................................................................................................................66 How are Flood-Prone Areas Identified? .............................................................................67 Definitions of FEMA Flood Zone Designations ...................................................................68 Flood-Mapping Methods and Techniques ..........................................................................73 Historic Flooding in Southern California .............................................................................73 Previous Occurrences of Flooding in the City of Buena Park .............................................74 Flood Hazard Assessment .................................................................................................75 Local Conditions ................................................................................................................76 Impact of Flooding in Buena Park ......................................................................................79 Section 6: Drought .................................................................................................. 83 Hazard Identification and Risk Assessment .......................................................................83 Previous Occurrences of Drought ......................................................................................86 Impact of Drought on Buena Park ......................................................................................89 PART III: MITIGATION STRATEGIES ..................................................... 93 Section 7: Mitigation Strategies ............................................................................. 93 Overview of Mitigation Strategy .........................................................................................93 Planning Approach ............................................................................................................93 Mitigation Measure Categories ..........................................................................................94 Goals .................................................................................................................................94 Public Participation ............................................................................................................96 How are the Mitigation Action Items Organized? ................................................................96 City of Buena Park General Plan 2010...............................................................................99 Mitigation Actions Matrix ................................................................................................ 103 Section 8: Planning Process ................................................................................ 129 Plan Methodology ............................................................................................................ 129 Planning Team ................................................................................................................