CITY OF PLEASANTON, CALIFORNIA COMPREHENSIVE EMERGENCY MANAGEMENT PLAN ANNEX D ALL HAZARD VULNERABILITY ASSESSMENT CITY OF PLEASANTON ALL-HAZARD VULNERABILITY ANALYSIS Table of Contents INTRODUCTION........................................................................................................................................... 3 RISK ASSESSMENT ................................................................................................................................... 3 Kinds of Hazard ........................................................................................................................................... 3 Severity of Hazard....................................................................................................................................... 4 Affect of Hazard........................................................................................................................................... 4 Impact of Hazard on the Community ....................................................................................................... 4 DEMOGRAPHIC........................................................................................................................................... 5 LAND USE .................................................................................................................................................... 5 BUSINESS .................................................................................................................................................... 5 TRANSPORTATION .................................................................................................................................... 5 GENERAL CLIMATE ................................................................................................................................... 6 Severe Weather ........................................................................................................................................... 6 Local Meteorology ...................................................................................................................................... 6 CRITICAL FACILITIES ................................................................................................................................6 INVENTORY OF ASSETS AND FACILITIES............................................................................................ 7 RISK PRIORITIZATION ............................................................................................................................... 7 COMMUNITY ASSETS................................................................................................................................8 NATURAL HAZARDS.................................................................................................................................. 9 EARTHQUAKE............................................................................................................................................. 9 Faults........................................................................................................................................................... 11 Earthquake Probability............................................................................................................................. 11 Earthquake Probability............................................................................................................................. 12 Livermore Earthquake (January 24, 1980) ............................................................................................ 15 Seismic Ground Response...................................................................................................................... 16 Geology.................................................................................................................................................... 16 Liquefaction.............................................................................................................................................. 22 Damage....................................................................................................................................................... 24 Road Closures Predictions ..................................................................................................................... 26 Hazardous Materials Problems in Earthquakes................................................................................... 42 FLOOD ........................................................................................................................................................ 45 Significant Flood Events.......................................................................................................................... 46 Flood Loss Estimation ............................................................................................................................. 46 HAZUS Loss Estimation Models: Flood................................................................................................. 46 Local Flood Information........................................................................................................................... 47 Flood History............................................................................................................................................ 47 Principal Flood Problems ........................................................................................................................ 48 Principal Flood Problems ........................................................................................................................ 49 Flood Protection Measures..................................................................................................................... 49 SEVERE WEATHER.................................................................................................................................. 49 El Niño......................................................................................................................................................... 49 WILD LAND FIRE....................................................................................................................................... 52 LAND SLIDES ............................................................................................................................................ 54 Hazards From "Mudslides", Debris Flows............................................................................................ 56 Debris Flows ............................................................................................................................................ 56 Rock Slides ................................................................................................................................................ 58 Local Slide Potential................................................................................................................................ 58 MAN-CAUSED HAZARDS........................................................................................................................ 59 Annex D--All Hazard Vulnerability Assessment Updated 9/26/2005 PAGE 1 CITY OF PLEASANTON ALL-HAZARD VULNERABILITY ANALYSIS DAM FAILURE INUNDATION................................................................................................................... 59 Livermore Valley Watershed................................................................................................................... 60 South Bay Aqueduct................................................................................................................................. 61 Del Valle Dam............................................................................................................................................. 62 Lake Del Valle State Recreation Area.................................................................................................... 63 Dam Failure Inundation Area – Del Valle Dam...................................... 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Local Impact............................................................................................................................................. 64 Hazard Materials Vulnerability Threat Summary................................................................................... 65 HAZARDOUS MATERIALS SITES & TRANSPORTATION ROUTES................................................. 66 Regulatory Agencies ................................................................................................................................66 Federal ..................................................................................................................................................... 66 State ......................................................................................................................................................... 66 Regional................................................................................................................................................... 67 Local............................................................................................................................................................ 67 Hazardous Materials Business Plan. ..................................................................................................... 68 Emergency Response.