Safety Element Thousand Oaks General Plan City of Thousand Oaks City Council Mayor Andrew P. Fox Mayor Pro-Tem Al Adam Councilmember Claudia Bill-de la Peña Councilmember Jacqui V. Irwin Councilmember Joel R. Price Planning Commission Daniel Roundtree, Chair Douglas Nickles, Vice-Chair Michael Farris, Commissioner Daryl Reynolds, Commissioner Peter Turpel, Commissioner City of Thousand Oaks Staff John C. Prescott, AICP, Community Development Director Mark A. Towne, AICP, Deputy Director/City Planner Jeffrey Specter, Senior Planner March, 2014 Thousand Oaks General Plan Safety Element 2014 Update Table of Contents Table of Contents CHAPTER 1: INTRODUCTION ...................................................................................... 1 A. Overview .............................................................................................................. 1 B. Relation to Other Elements of the General Plan ................................................... 2 C. Relation to City’s Hazard Mitigation Plan .............................................................. 2 D. Planning Area Setting ........................................................................................... 2 CHAPTER 2: GEOLOGY AND SEISMICITY .................................................................. 5 A. Faulting and Seismic Hazards .............................................................................. 5 B. Regional Geology ................................................................................................. 6 C. Seismic Setting ..................................................................................................... 7 D. Geologic Hazards ................................................................................................. 9 E. Slope Stability (Landslides, Debris Flows, Rockfalls, and Mudslides) ................ 27 F. Soil Related Hazards .......................................................................................... 30 CHAPTER 3: FLOODING ............................................................................................. 35 A. Dam Inundation .................................................................................................. 35 B. Historic Flooding ................................................................................................. 35 C. Flood Hazards .................................................................................................... 37 D. Flood Control and Prevention ............................................................................. 39 E. Potential Inundation Due to Dam Failure ............................................................ 40 CHAPTER 4: FIRE HAZARDS ..................................................................................... 45 A. Urban Fire Hazards ............................................................................................ 45 B. Existing and Proposed Fire Stations ................................................................... 46 C. Wildfires .............................................................................................................. 48 CHAPTER 5: HAZARDOUS MATERIALS ................................................................... 57 CHAPTER 6: TERRORISM .......................................................................................... 61 CHAPTER 7: DISASTER PREPAREDNESS ............................................................... 65 A. Emergency Operations Plan ............................................................................... 65 CHAPTER 8: CRITICAL AND LIFELINE FACILITIES ................................................. 69 A. Critical Facilities .................................................................................................. 69 B. Schools ............................................................................................................... 70 C. Lifeline Facilities ................................................................................................. 74 i Thousand Oaks General Plan Table of Contents Safety Element 2014 Update CHAPTER 9: POLICIES .............................................................................................. 79 A. Faulting and Seismic Hazards ............................................................................ 79 B. Geologic Hazards ............................................................................................... 80 C. Flood Hazards .................................................................................................... 81 D. Fire Hazards ....................................................................................................... 82 E. Hazardous Materials ........................................................................................... 84 F. Terrorism ............................................................................................................ 85 G. Disaster Preparedness ....................................................................................... 85 GLOSSARY .................................................................................................................. 87 BIBLIOGRAPHY ........................................................................................................... 93 A. Planning/Planning for Seismic Hazards .............................................................. 93 B. Seismicity and Regional Tectonics ..................................................................... 93 C. Area Geology...................................................................................................... 96 D. Soils and Slope Stability ..................................................................................... 96 E. Groundwater and Flooding ................................................................................. 97 F. Plans, Ordinances and Guidelines ..................................................................... 98 G. Terrorism ............................................................................................................ 98 H. Other .................................................................................................................. 99 TABLES Table 1: Modified Mercalli Intensity Scale ..................................................................... 11 Table 2: Estimated Ground Accelerations and Intensities ............................................. 12 Table 3: Major Flood Events in Ventura County ............................................................ 36 Table 4: Dams in the Thousand Oaks Area .................................................................. 43 Table 5: Incident Activity for Thousand Oaks Service Area (2011) .............................. 47 Table 6: Fire Station Capabilities .................................................................................. 47 Table 7: Brush Fires Near Thousand Oaks (1952-2013) ............................................... 50 Table 8: Critical Facilities in Thousand Oaks ................................................................ 72 FIGURES Figure 1: Local Faults .................................................................................................... 15 Figure 2: Regional Faults .............................................................................................. 16 Figure 3: Ground Shaking Potential .............................................................................. 21 Figure 4: Liquifaction Areas ........................................................................................... 26 Figure 5: Landslide Hazard Area ................................................................................... 29 Figure 6: Expansive Soils .............................................................................................. 32 Figure 7: Groundwater Seepage Areas ......................................................................... 34 Figure 8 : Flood Zones .................................................................................................. 41 Figure 9: Dam Inundation Areas ................................................................................... 44 Figure 10: Very High Fire Severity Zone ....................................................................... 54 Figure 11: Evacuation Routes ....................................................................................... 66 Figure 12: Critical Facilities ........................................................................................... 71 ii Thousand Oaks General Plan Safety Element 2014 Update Table of Contents Figure 13: Lifeline Facilities ........................................................................................... 77 PHOTOGRAPHS Photo 1: Northridge Earthquake, Calif., January 17, 1994 .............................................. 5 Photo 2: Northridge Earthquake, Calif., January 17, 1994 ............................................ 13 Photo 3: 1994 Northridge Earthquake Damage to Thousand Oaks Library .................. 14 Photo 4: Road Displacement Due to Ground Rupture .................................................. 23 Photo 5: Flooding on Newbury Road (1992) ................................................................. 37 Photo 6: Casitas Springs CA, January 15, 2005 ........................................................... 39 Photo 7: Aerial view of Westlake Lake .......................................................................... 42 Photo 8: Structure Fire on Thousand