Berkeley Mitigation Plan Chapter 1
Total Page:16
File Type:pdf, Size:1020Kb
Section 3: Hazard Analysis FIRST DRAFT October 21, 2013 Hazard Analysis Table of Contents 3 Hazard Analysis ........................................................................................................... 5 3.1 Identification of Hazards..................................................................................... 5 3.1.1 Natural Hazards ......................................................................................................... 5 3.1.2 Manmade Hazards ..................................................................................................... 6 3.1.3 Public Health Impacts of Identified Hazards .............................................................. 6 3.1.4 Hazards Not Considered in the Plan .......................................................................... 7 3.2 Components of the Hazards Analysis ................................................................. 7 SECTION A: HAZARDS OF GREATEST CONCERN ............................................... 9 3.3 Earthquakes ......................................................................................................... 9 3.3.1 Historical Earthquakes ............................................................................................... 9 3.3.2 Earthquake Hazard .................................................................................................... 9 3.3.3 Exposure and Vulnerability ...................................................................................... 26 3.3.4 Earthquake Risk and Loss Estimates ........................................................................ 70 3.4 Wildland-Urban Interface Fire .......................................................................... 75 3.4.1 Historical Wildland-Urban Interface Fires ............................................................... 75 3.4.2 Wildland-Urban Interface Fire Hazard ..................................................................... 78 3.4.3 Exposure and Vulnerability ...................................................................................... 78 3.4.4 Wildland-Urban Interface Fire Risk and Loss Estimates .......................................... 87 SECTION B: HAZARDS OF CONCERN ................................................................... 88 3.5 Rainfall-Triggered Landslides .......................................................................... 88 3.5.1 Historical Rainfall-Triggered Landslides ................................................................... 88 3.5.2 Rainfall-Triggered Landslide Hazard ........................................................................ 88 3.5.3 Exposure and Vulnerability ...................................................................................... 89 3.5.4 Landslide Risk and Loss Estimates ........................................................................... 89 3.6 Floods ................................................................................................................ 90 3.6.1 Historical Floods ...................................................................................................... 90 3.6.2 Flood Hazard ............................................................................................................ 90 3.6.3 Exposure and Vulnerability ...................................................................................... 91 2014 First Draft: Berkeley Local Hazard Mitigation Plan - 1 - Section 3: Hazard Analysis FIRST DRAFT October 21, 2013 3.6.4 Flood Risk and Loss Estimates ................................................................................. 99 3.7 Tsunami........................................................................................................... 101 3.7.1 Historical Tsunamis ................................................................................................ 101 3.7.2 Tsunami Hazard ..................................................................................................... 101 3.7.3 Exposure and Vulnerability .................................................................................... 102 3.7.4 Tsunami Risk and Loss Estimates ........................................................................... 106 3.8 Climate Change ............................................................................................... 108 3.8.1 Direct and Secondary Climate Change Impacts ..................................................... 108 3.8.2 Climate Change Impacts to Natural Hazards of Concern ...................................... 112 SECTION C: ADDITIONAL HAZARDS ................................................................. 116 3.9 Hazardous Materials Release .......................................................................... 116 3.9.1 Historical Hazardous Materials Releases ............................................................... 116 3.9.2 Hazardous Materials Release Hazard .................................................................... 116 3.9.3 Exposure and Vulnerability .................................................................................... 117 3.9.4 Hazardous Materials Release Risk and Loss Estimates .......................................... 123 3.10 Terrorism......................................................................................................... 124 3.11 Hazard Analysis and Actions Summary ......................................................... 125 3.11.1 Hazard Analysis Summary ................................................................................. 125 3.11.2 Vulnerabilities and Actions Summary ............................................................... 125 2014 First Draft: Berkeley Local Hazard Mitigation Plan - 2 - Section 3: Hazard Analysis FIRST DRAFT October 21, 2013 Maps Map 3.1 Regional faults and their location with respect to Berkeley ............................... 10 Map 3.2 Modified Mercalli Intensity for Magnitude 7.3 Scenario Earthquake on the Hayward fault.................................................................................................................... 13 Map 3.3 Berkeley Seismic Hazard Planning Zones.......................................................... 15 Map 3.4 Landslide hazard for 7.1 Hayward fault earthquake scenario ............................ 18 Map 3.5 Active and potentially-active landslides in Berkeley hills (developed by Alan Kropp Associates and used with permission) ................................................................... 19 Map 3.6 Liquefaction Scenario Map ................................................................................ 22 Map 3.7 Single-Family Homes with structural and nonstructural mitigation work from 2004 -2011 ........................................................................................................................ 33 Map 3.8 Retrofitted and Unretrofitted Soft-Story Buildings ............................................ 36 Map 3.9 Retrofitted and Unretrofitted Unreinforced Masonry Buildings ........................ 38 Map 3.10 Potentially Hazardous Tilt-Up Concrete Buildings .......................................... 40 Map 3.11 Seismic Hazard Planning Zones, Gas Transmission Pipelines and Jet Fuel Line ........................................................................................................................................... 49 Map 3.12 Seismic Hazard Planning Zones and Transportation Infrastructure ................. 53 Map 3.13 Seismic Hazard Planning Zones and Critical Facilities.................................... 62 Map 3.14 Area burned by 1923 Berkeley Fire ................................................................. 77 Map 3.15 City-designated and Calfire hazardous fire zones ............................................ 80 Map 3.16 Digital Flood Insurance Rate Map.................................................................... 93 Map 3.17 Berkeley Area Watersheds .............................................................................. 95 Map 3.18 Berkeley Tsunami Inundation ........................................................................ 104 Map 3.19 Berkeley Shoreline Areas Prone to Sea Level Rise ........................................ 111 Map 3.20 Level 1 Hazardous Materials Facilities, Transportation Systems and Primary Natural Hazards .............................................................................................................. 121 2014 First Draft: Berkeley Local Hazard Mitigation Plan - 3 - Section 3: Hazard Analysis FIRST DRAFT October 21, 2013 Tables Table 3.1 Transfer Tax Rebate Program ........................................................................... 32 Table 3.2 Berkeley Soft-Story Building Status................................................................. 35 Table 3.3 Key Berkeley Utility Systems........................................................................... 42 Table 3.4 Sanitary Sewer System ..................................................................................... 45 Table 3.5 Storm Drain System .......................................................................................... 46 Table 3.6 Key Berkeley Transportation Systems ............................................................. 52 Table 3.7 Curbs, Streets and the Solano Tunnel ............................................................... 54 Table 3.8 Key Berkeley Communications Systems .......................................................... 57 Table 3.9 LifeLong Berkeley Healthcare