technical background report to the safety element of the 2035 general plan

TECHNICAL BACKGROUND REPORT TO THE SAFETY ELEMENT OF THE 2035 GENERAL PLAN

Presentation to Coachella’s City CouncilOctober 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

M7.8, Southern San Andreas fault M7.1, Coachella segment of San

Andreas fault

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

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

InjuriesFatalities

250-40010-27

52-621-2

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

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 GonzálezVice-President, Sr. Consultant

Earth Consultants International, Inc.tgonzalez@earthconsultants.com

714-412-2654