San Diego County Multi-Jurisdiction Hazard Mitigation Plan San Diego County, California
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FINAL DRAFT SAN DIEGO COUNTY MULTI-JURISDICTION HAZARD MITIGATION PLAN SAN DIEGO COUNTY, CALIFORNIA FEBRUARY 2010 This page intentionally left blank. TABLE OF CONTENTS Section 1 Introduction ......................................................................................................1-1 1.1 Plan Description/Purpose of Plan ..........................................................................1-1 1.2 Plan Purpose and Authority...................................................................................1-2 1.3 Community Description.........................................................................................1-3 1.3.1 The County of San Diego..........................................................................1-3 1.3.2 Local Jurisdictions ....................................................................................1-6 Section 2 Multi-Jurisdictional Participation Information...............................................2-1 2.1 List of Participating and Non-Participating Jurisdictions......................................2-1 2.2 Description of Each Jurisdiction’s Participation in the Planning Process .............2-1 Section 3 Planning Process Documentation ..................................................................3-1 3.1 Description of Planning Committee Formation.....................................................3-1 3.2 Name of Planning Committee and its Members....................................................3-1 3.3 Hazard Mitigation Working Group Meetings........................................................3-2 3.4 Planning Process Milestones .................................................................................3-3 3.5 Public Involvement................................................................................................3-4 3.6 Existing Plans or Studies Reviewed ......................................................................3-4 Section 4 Risk Assessment..............................................................................................4-1 4.1 Overview of the Risk Assessment Process............................................................4-1 4.1.1 Identifying Hazards...................................................................................4-1 4.1.2 Profiling Hazards ......................................................................................4-1 4.1.3 Identifying Assets .....................................................................................4-2 4.1.4 Assessing Vulnerability ............................................................................4-2 4.1.5 Repetitive Loss..........................................................................................4-2 4.1.6 Analyzing Development Trends ...............................................................4-3 4.2 Hazard Identification and Screening......................................................................4-3 4.2.1 List of Hazards Prevalent in the Jurisdiction ............................................4-3 4.2.2 Hazard Identification Process ...................................................................4-3 4.2.3 Hazard Identification Sources...................................................................4-6 4.2.4 Non-Profiled Hazards ...............................................................................4-6 4.3 Hazard Profiles ......................................................................................................4-8 4.3.1 Coastal Storms, Erosion and Tsunami ......................................................4-8 4.3.2 Dam Failure ............................................................................................4-19 4.3.3 Earthquake ..............................................................................................4-23 4.3.4 Flood .......................................................................................................4-29 4.3.5 Rain-Induced Landslide ..........................................................................4-35 4.3.6 Liquefaction ............................................................................................4-39 4.3.7 Structure/Wildfire Fire............................................................................4-43 4.3.8 Manmade Hazards...................................................................................4-49 4.4 Vulnerability Assessment ....................................................................................4-54 4.4.1 Asset Inventory .......................................................................................4-54 4.4.2 Estimating Potential Exposure and Losses, and Future Development Trends .....................................................................................................4-55 4.5 Multi-Jurisdictional Assessment........................................................................4-101 i TABLE OF CONTENTS 4.5.1 Analysis of Land Use............................................................................4-101 4.5.2 Analysis of Development Trends..........................................................4-105 Section 5 Goals, Objectives and Actions........................................................................5-1 5.1 Overview ...............................................................................................................5-1 5.2 Regional Considerations........................................................................................5-2 5.3 City of Carlsbad.....................................................................................................5-3 5.3.1 Capabilities Assessment............................................................................5-4 5.3.2 Goals, Objectives and Actions..................................................................5-7 5.4 City of Chula Vista ..............................................................................................5-15 5.4.1 Capabilities Assessment..........................................................................5-17 5.4.2 Goals, Objectives and Actions................................................................5-23 5.5 City of Coronado .................................................................................................5-41 5.5.1 Capabilities Assessment..........................................................................5-42 5.5.2 Goals, Objectives and Actions................................................................5-45 5.6 City of Del Mar....................................................................................................5-53 5.6.1 Capabilities Assessment..........................................................................5-54 5.6.2 Goals, Objectives and Actions................................................................5-57 5.7 City of El Cajon...................................................................................................5-65 5.7.1 Capabilities Assessment..........................................................................5-66 5.7.2 Goals, Objectives and Actions................................................................5-69 5.8 City of Encinitas ..................................................................................................5-79 5.8.1 Capabilities Assessment..........................................................................5-81 5.8.2 Goals, Objectives and Actions................................................................5-84 5.9 City of Escondido ..............................................................................................5-101 5.9.1 Capability Assessment ..........................................................................5-102 5.9.2 Goals, Objectives and Actions..............................................................5-107 5.10 City of Imperial Beach.......................................................................................5-121 5.10.1 Capabilities Assessment........................................................................5-122 5.10.2 Goals, Objectives and Actions..............................................................5-126 5.11 City of La Mesa .................................................................................................5-139 5.11.1 Capabilities Assessment........................................................................5-140 5.11.2 Goals, Objectives and Actions..............................................................5-143 5.12 City of Lemon Grove.........................................................................................5-151 5.12.1 Capabilities Assessment........................................................................5-152 5.12.2 Goals, Objectives and Actions..............................................................5-155 5.13 City of National City .........................................................................................5-161 5.13.1 Capabilities Assessment........................................................................5-162 5.13.2 Goals, Objectives and Actions..............................................................5-165 5.14 City of Oceanside............................................................................................5-177 5.14.1 Capabilities Assessment ...................................................................5-178 5.14.2 Goals, Objectives and Actions .........................................................5-182 5.15 City of Poway ....................................................................................................5-189