Presentation to Coachella’s City Council October 8, 2014 Technical Background Report to the Safety Element of the 2035 General Plan Presentation to Coachella’s City Council October 8, 2014
SAFETY ELEMENT Mandatory component of the General Plan Discusses natural and man-made hazards Provides mitigation actions Discusses disaster preparedness, response and recovery
Report SECTIONS Chapter 1: Seismic Hazards Chapter 2: Geologic Hazards Chapter 3: Flood Hazards Chapter 4: Fire Hazards Chapter 5: Hazardous Materials Management Chapter 6: Severe Weather Hazards Chapter 7: Disaster Preparedness, Response and Recovery Appendix A: References Appendix B: Glossary
Chapter 1: Seismic hazards Regulatory framework Notable Historic Earthquakes Seismic Shaking Emphasis on the ShakeOut Scenario Fault Rupture Liquefaction Earthquake-Induced Landslides
Faults and historical seismicity
Liquefaction and slope instability
Hazus earthquake scenarios Software created for FEMA; runs on ArcGIS platform; analyses conducted by a certified HazUS Trained Professional Estimates losses resulting from earthquakes, floods and hurricanes Uses Census data; user-modified to better represent conditions M7.8, Southern San Andreas fault M7.1, Coachella segment of San Andreas fault
Hazus results M7.8 ShakeOut Scenario M7.1 Coachella Segment Scenario Building-Related Economic Losses >$880 million >$260 million Building Damage 3,700 moderately; 500 extensively; 3,000 completely 980 moderately; 1,300 extensively; 260 completely Injuries Fatalities 250-400 10-27 52-62 1-2 Damage to Utilities Severe; no water or electric power for > 3 months Minor; 1000’s of households with no water for 1 week Damage to Critical Facilities Extensive damage to schools and hospitals Moderate damage to schools and hospitals
Chapter 2: GEOLOGIC hazards Landslides and unstable slopes Compressible, collapsible, expansive and corrosive soils Ground subsidence Erosion and wind-blown sand
Chapter 3: Flood hazards
Seismically induced inundation
500-year flood on Whitewater River Hazus loss scenario 500-year flood on Whitewater River Building-Related Losses >$187 Million Buildings >280 extensively damaged >2,200 slightly to moderately damaged Critical Facilities Many moderately damaged; none will be substantially damaged
Chapter 4: Fire Hazards Vegetation fires Structure fires Chemical Fires Fires after an Earthquake Fire Suppression Services Chapter completed with significant input from the Riverside County Fire Department and Battalion Chief De La Cruz
High fire hazard areas
Chapter 5: Hazardous materials management Superfund, Cortese, Toxic Release Inventory, EPA-registered Generators Leaking Underground Storage Tank Sites Drinking Water Quality Household Hazardous Waste & Recycling Releases due to Transportation Accidents Earthquake-Induced Releases
Hazardous materials sites
Chapter 6: Severe weather High Winds Hail Temperature Extremes Drought
Chapter 7: Disaster preparedness Risk Analysis Impact to Critical Facilities Potential Evacuation Routes Potential Shelter Locations
Potential Emergency Shelters and Evacuation Routes
THANK YOU! ANY QUESTIONS? Tania González Vice-President, Sr. Consultant Earth Consultants International, Inc. tgonzalez@earthconsultants.com 714-412-2654