HAZARD MITIGATION PLAN 2010 Page intended to be blank. Table of Contents EXECUTIVE SUMMARY ................................................................................. Executive Summary -1 Organization of the Plan ............................................................................ Executive Summary -1 Development of the Plan .......................................................................... Executive Summary -1 Mission Statement .................................................................................... Executive Summary -2 Goals of the Plan ....................................................................................... Executive Summary -2 Organization of the Action Items .............................................................. Executive Summary -3 Plan Implementation, Monitoring, and Evaluation ................................... Executive Summary -4 Plan Adoption ............................................................................................ Executive Summary -4 Coordinating Body ..................................................................................... Executive Summary -5 Convener ................................................................................................... Executive Summary -5 Implementation through Existing Programs ............................................. Executive Summary -5 Economic Analysis of Mitigation Projects ................................................. Executive Summary -5 Formal Review Process .............................................................................. Executive Summary -5 Continued Public Involvement .................................................................. Executive Summary -6 Acknowledgements ................................................................................... Executive Summary -6 SECTION ONE - INTRODUCTION ......................................................................... Section One -1 Background ............................................................................................................. Section One -1 Why Develop a Hazard Mitigation Plan? ............................................................... Section One -1 Whom Does the Plan Affect? ................................................................................. Section One -2 Hazard Land Use Policy in California ...................................................................... Section One -2 Support for Hazard Mitigation ............................................................................... Section One -2 Plan Methodology .................................................................................................. Section One -3 Input from the Steering Committee ....................................................................... Section One -3 State and Federal Guidelines and Requirements for Mitigation Plans .................. Section One -3 Hazard Specific Research........................................................................................ Section One -4 Public Workshops ................................................................................................... Section One -4 How Is the Plan Organized? ................................................................................... Section One -4 SECTION TWO - COMMUNITY PROFILE ............................................................... Section Two -1 Why Plan for Natural Hazards in the City of Santa Clarita .................................... Section Two -1 Santa Clarita Geography and Environment ........................................................... Section Two -1 History of Santa Clarita .......................................................................................... Section Two -1 Major Rivers .......................................................................................................... Section Two -3 Climate ................................................................................................................... Section Two -3 Minerals and Soils ................................................................................................. Section Two -4 Other Significant Geologic Features ...................................................................... Section Two -4 Population and Demographics .............................................................................. Section Two -6 Land and Development ......................................................................................... Section Two -7 Housing and Community Development ................................................................ Section Two -9 Employment and Industry ..................................................................................... Section Two -9 Capabilities Assessment ......................................................................................Section Two -10 Existing Institutions, Plans, Policies and Ordinances ..........................................Section Two -11 City of Santa Clarita Hazard Mitigation Plan - 2010 TOC - i Fiscal Resources ...................................................................................................Section Two -12 SECTION THREE - RISK ASSESSMENT ............................................................... Section Three -1 What is Risk Assessment .................................................................................... Section Three -1 Federal Requirements for Risk Assessment ....................................................... Section Three -5 Critical Facilities and Infrastructure ................................................................... Section Three -6 SECTION FOUR - MULTI-HAZARD GOALS AND ACTION ITEMS ............................ Section Four -1 SECTION FIVE - EARTHQUAKE HAZARD PROFILE ................................................. Section Five -1 Earthquake Hazard Information and Background ............................................... Section Five -1 Earthquake History .............................................................................................. Section Five -6 Probability, Frequency and Magnitude ............................................................... Section Five -8 Historic Losses and Impacts ............................................................................... Section Five -10 Designated Hazard Areas ................................................................................... Section Five -10 Vulnerability Assessment ................................................................................... Section Five -10 Community Earthquake Issues .......................................................................... Section Five -11 Potential Damages ............................................................................................. Section Five -14 Existing Mitigation Measures............................................................................. Section Five -15 California Earthquake Mitigation Measures ...................................................... Section Five -18 Earthquake Education ........................................................................................ Section Five -19 Earthquake Mitigation Action Items .................................................................. Section Five -20 Earthquake Resource Directory ......................................................................... Section Five -22 SECTION SIX - FLOOD HAZARD PROFILE ................................................................ Section Six -1 Flood Hazard Information and Background ........................................................... Section Six -1 Flood History .......................................................................................................... Section Six -5 Probability, Frequency and Magnitude ................................................................. Section Six -5 Historic Losses and Impacts ................................................................................... Section Six -6 Designated Hazard Areas ....................................................................................... Section Six -8 Potential Damages ................................................................................................. Section Six -8 Repetitive Loss Properties ..................................................................................... Section Six -9 Existing Mitigation Activities ................................................................................ Section Six -10 Community Rating System ................................................................................... Section Six -11 Flood Mitigation Action Items ............................................................................. Section Six -12 Flood Resource Directory..................................................................................... Section Six -14 SECTION SEVEN - HAZARDOUS MATERIALS HAZARD PROFILE ........................... Section Seven-1 Hazardous Materials Hazard Information and Background ............................. Section Seven -1 Hazardous Materials History............................................................................. Section Seven -4 Probability, Frequency and Magnitude ............................................................ Section Seven -5 Historic Losses and Impacts .............................................................................. Section Seven -6 Designated Hazard