LOMA PRIETA, CA EARTHQUAKE OCTOBER 17, 1989 Dr. Walter Hays, Global Alliance For Disaster Reduction.

LOMA PRIETA, CA EARTHQUAKE

OCTOBER 17, 1989

Dr. Walter Hays,

Global Alliance For Disaster Reduction

LOMA PRIETA, CALIFORNIA EARTHQUAKE

LOMA PRIETA, CALIFORNIA EARTHQUAKE

5:04 PM ON OCTOBER 17, 1989M 7.1

62 DEATHS

$1 BILLION INSURED LOSS

FRAGILE INFRASTRUCTURE EXPOSED

5:04 PM ON OCTOBER 17, 1989M 7.1

62 DEATHS

$1 BILLION INSURED LOSS

FRAGILE INFRASTRUCTURE EXPOSED

LOMA PRIETA EARTHQUAKELOMA PRIETA EARTHQUAKE

• 62 DEATHS

• 3,757 INJURIES

• 8,000 HOMELESS

• $5.6 BILLION PROPERTY DAMAGE

• LIFELINE FLAWS

LOMA PRIETA EARTHQUAKELOMA PRIETA EARTHQUAKE• 1,300 BUILDINGS

DESTROYED

• 20,000 BUILDINGS DAMAGED

• 3,500 BUSINESSES DAMAGED

• $1.8 BILLION LOSS TO TRANS- PORTATION

CA: HIGH SEISMICITYCA: HIGH SEISMICITY

CALIFORNIA’S FAULTS (SOURCE: CDMG)

CALIFORNIA’S FAULTS (SOURCE: CDMG)

USGS’S 1988 FORCAST OF EARTHQUAKE PROBABITIESUSGS’S 1988 FORCAST OF

EARTHQUAKE PROBABITIES

Schematic Diagram of the Schematic Diagram of the Earthquake MechanismEarthquake Mechanism

Schematic Diagram of the Schematic Diagram of the Earthquake MechanismEarthquake Mechanism

NORTHNORTHNORTHNORTHWESTWESTWESTWEST

Schematic Diagram of the Earthquake Schematic Diagram of the Earthquake Mechanism, But Without Surface Mechanism, But Without Surface

RuptureRupture

Schematic Diagram of the Earthquake Schematic Diagram of the Earthquake Mechanism, But Without Surface Mechanism, But Without Surface

RuptureRupture

NORTHNORTHNORTHNORTHWESTWESTWESTWEST

GROUND FAILURE, NOT SURFACE FAULT RUPTURE

POWER OUTAGES BEGAN AT 5:04 PM IN THE REGION

POWER OUTAGES BEGAN AT 5:04 PM IN THE REGION

FIRE IN MARINA DISTRICT 100 KM FROM EPICENTER

FIRE IN MARINA DISTRICT 100 KM FROM EPICENTER

LIQUEFACTION: MARINA DISTRICT

LIQUEFACTION: MARINA DISTRICT

VULNERABLE SOFT-STORY BUILDINGS: MARINA DISTRICT

VULNERABLE SOFT-STORY BUILDINGS: MARINA DISTRICT

LATERAL SPREADING: SAN FRANCISCO WHARF AREA

LATERAL SPREADING: SAN FRANCISCO WHARF AREA

VULNERABLE UNREINFORCED MASONRY BUILDINGS

VULNERABLE UNREINFORCED MASONRY BUILDINGS

VULNERABLE UNREINFORCED MASONRY BUILDINGS

VULNERABLE UNREINFORCED MASONRY BUILDINGS

COLLAPSE OF ELEVATED CYPRESS VIADUCT

COLLAPSE OF ELEVATED CYPRESS VIADUCT

FORTY-ONE VICTIMS AT THE CYPRESS VIADUCT

FORTY-ONE VICTIMS AT THE CYPRESS VIADUCT

FAILURE OF A SPAN ON THE OAKLAND BAY BRIDGE

FAILURE OF A SPAN ON THE OAKLAND BAY BRIDGE

WIDESPREAD POWER OUTAGES

WIDESPREAD POWER OUTAGES

GOVERNOR DEUKMEJIAN’S BOARD OF GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY INQUIRY

GOAL: TO FIND THE COMMON AGENDAGOAL: TO FIND THE COMMON AGENDA(CA) OF TECHNICAL (CA) OF TECHNICAL

AND POLITICAL SOLUTIONSAND POLITICAL SOLUTIONS

GOAL: TO FIND THE COMMON AGENDAGOAL: TO FIND THE COMMON AGENDA(CA) OF TECHNICAL (CA) OF TECHNICAL

AND POLITICAL SOLUTIONSAND POLITICAL SOLUTIONS

TECHNICAL TECHNICAL SOLUTIONSSOLUTIONSTECHNICAL TECHNICAL SOLUTIONSSOLUTIONS

POLITICAL POLITICAL SOLUTIONSSOLUTIONSPOLITICAL POLITICAL

SOLUTIONSSOLUTIONS

CACA

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• QUESTION 1:

• WHY DID THE CYPRESS VIADUCT ON INTERSTATE 880 AND THE OAKLAND BAY BRIDGE SPAN FAIL?

• QUESTION 1:

• WHY DID THE CYPRESS VIADUCT ON INTERSTATE 880 AND THE OAKLAND BAY BRIDGE SPAN FAIL?

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• QUESTION 2:

• COULD THESE FAILURES HAVE BEEN FORESEEN?

• QUESTION 2:

• COULD THESE FAILURES HAVE BEEN FORESEEN?

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• QUESTION 3:

• CAN WE IMPROVE OUR ABILITY TO PREDICT ACCURATELY FUTURE BRIDGE FAILURES?

• QUESTION 3:

• CAN WE IMPROVE OUR ABILITY TO PREDICT ACCURATELY FUTURE BRIDGE FAILURES?

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• QUESTION 4:

• IS THE SCHEDULE FOR AND MANNER OF RETROFITTING CA’S BRIDGE STRUCTURES APPROPRIATE IN TERMS OF THE STATE-OF-ART?

• QUESTION 4:

• IS THE SCHEDULE FOR AND MANNER OF RETROFITTING CA’S BRIDGE STRUCTURES APPROPRIATE IN TERMS OF THE STATE-OF-ART?

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• QUESTION 5:

• SHOULD CA MODIFY EXISTING CONSTRUCTION AND RETROFIT PROGRAMS FOR BRIDGE STRUCTURES?

• QUESTION 5:

• SHOULD CA MODIFY EXISTING CONSTRUCTION AND RETROFIT PROGRAMS FOR BRIDGE STRUCTURES?

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

GOVERNOR DEUKMEJIAN’S BOARD OF INQUIRY

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• THE BOARD’S REPORT: “COMPETING AGAINST TIME”

• QUESTION 6:

• ARE CA’S FREEWAY SYSTEMS SAFE FROM FUTURE EARTHQUAKES?

• QUESTION 6:

• ARE CA’S FREEWAY SYSTEMS SAFE FROM FUTURE EARTHQUAKES?

GOVERNOR DEUKMAJIAN’S BOARD GOVERNOR DEUKMAJIAN’S BOARD OF INQUIRY OF INQUIRY

GOVERNOR DEUKMAJIAN’S BOARD GOVERNOR DEUKMAJIAN’S BOARD OF INQUIRY OF INQUIRY

FACT: THE COMMON AGENDA WAS BASED FACT: THE COMMON AGENDA WAS BASED ON THE STRICKEN COMMUNITY’S ON THE STRICKEN COMMUNITY’S STAPLE FACTORSSTAPLE FACTORS

FACT: THE COMMON AGENDA WAS BASED FACT: THE COMMON AGENDA WAS BASED ON THE STRICKEN COMMUNITY’S ON THE STRICKEN COMMUNITY’S STAPLE FACTORSSTAPLE FACTORS

TECHNICAL TECHNICAL SOLUTIONSSOLUTIONSTECHNICAL TECHNICAL SOLUTIONSSOLUTIONS

POLITICAL POLITICAL SOLUTIONSSOLUTIONSPOLITICAL POLITICAL

SOLUTIONSSOLUTIONS

STAPLE STAPLE FACTORSFACTORSSTAPLE STAPLE

FACTORSFACTORS

PPPP

TTTTSSSS

OOOO

CACA

THE STAPLE FACTORS ALWAYS VARY WITH

THE STAPLE FACTORS ALWAYS VARY WITH

• TIME

• PLACE• CIRCUMSTANCES

• TIME

• PLACE• CIRCUMSTANCES

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS• 1. AFFIRM THE

POLICY THAT SEISMIC SAFETY IS A PRIMARY CONCERN FOR ALL TRANSPORTATION SYSTEMS

• 1. AFFIRM THE POLICY THAT SEISMIC SAFETY IS A PRIMARY CONCERN FOR ALL TRANSPORTATION SYSTEMS

• 2. ESTABLISH THE POLICY THAT SEISMIC SAFETY IS A PRIORITY FOR ALL PUBLIC AND PRIVATE BUILDINGS

• 2. ESTABLISH THE POLICY THAT SEISMIC SAFETY IS A PRIORITY FOR ALL PUBLIC AND PRIVATE BUILDINGS

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS• 3. ESTABLISH A

MECHANISM TO ADVISE THE GOVERNOR AND LEGISLATURE ON THE ACTIONS OF CA’S AGENCIES TO ACHIEVE SEISMIC SAFETY

• 3. ESTABLISH A MECHANISM TO ADVISE THE GOVERNOR AND LEGISLATURE ON THE ACTIONS OF CA’S AGENCIES TO ACHIEVE SEISMIC SAFETY

• 4. PREPARE A PLAN TO MEET THE GOVERNOR’S GOALS FOR THE SEISMIC SAFETY OF CA’S TRANSPORTATION SYSTEMS

• 4. PREPARE A PLAN TO MEET THE GOVERNOR’S GOALS FOR THE SEISMIC SAFETY OF CA’S TRANSPORTATION SYSTEMS

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS• 5. FORM A

PERMANENT EARTHQUAKE ADVISORY BOARD TO ADVISE CALTRANS ON POLICY, STANDARDS, AND PRACTICE

• 5. FORM A PERMANENT EARTHQUAKE ADVISORY BOARD TO ADVISE CALTRANS ON POLICY, STANDARDS, AND PRACTICE

• 6. ENSURE THAT CALTRAN’S SEISMIC DESIGN POLICIES AND CONSTRUCTION PRACTICES MEET THE POLICIES AND GOALS SET BY THE GOVERNOR

• 6. ENSURE THAT CALTRAN’S SEISMIC DESIGN POLICIES AND CONSTRUCTION PRACTICES MEET THE POLICIES AND GOALS SET BY THE GOVERNOR

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS

BOARD’S RECOMMENDATIONS: INTEGRATED POLITICAL AND

TECHNICAL SOLUTIONS

• 7. TAKE SPECIFIC ACTIONS TO REDUCE VULNERABILITIES OF NEW AND EXISTING TRANSPORTATION SYSTEMS

• 7. TAKE SPECIFIC ACTIONS TO REDUCE VULNERABILITIES OF NEW AND EXISTING TRANSPORTATION SYSTEMS

• 8. INVOLVE ALL TRANSPORTATION AGENCIES AND DISTRICTS--RAIL, HIGHWAY, AIRPORTS, PORTS, AND HARBORS---IN THE SOLUTION

• 8. INVOLVE ALL TRANSPORTATION AGENCIES AND DISTRICTS--RAIL, HIGHWAY, AIRPORTS, PORTS, AND HARBORS---IN THE SOLUTION

State of California (1990), Competing Against Time, Report of Governor Deukmejian’s Board

of Inquiry on the Loma Prieta Earthquake

Office of Planning and Research, New Highlands, California, 264 p.