Seismic Re-Engineering of the VMT TOEM Committee RCAC Staff - - PowerPoint PPT Presentation

1/27/2006 Board Meeting

Seismic Re-Engineering of the VMT

TOEM Committee RCAC Staff Seismic Hazards Safety Commission Tom Kuckertz

1/27/2006 Board Meeting

Seismic Re-Engineering of VMT

• Scope of Seismic Re-engineering Project
• Seismic Hazards Safety Commission

– SHSC Members Appointed Only Recently – HB-83 Extends Sunset Provisions for SHSC – PWSRCAC Has Interest in Addressing Seismic Hazards at VMT

• Action Requested

– Resolution for Passage of HB-83

1/27/2006 Board Meeting

Three Issues Are of Concern

• Change from TAPS-specific seismic design

criteria to criteria based on international standards (IBC-2003/ASCE 7 )

• Potential for catastrophic failure of rock of

slopes above VMT

• Potential for catastrophic tsunamis at VMT

driven by underwater slumping of sediment.

1/27/2006 Board Meeting

Change in Standards Deal with Structural Integrity

1/27/2006 Board Meeting

Potential For Slope Failure?

1/27/2006 Board Meeting

Potential for Tsunami Damage to Berths?

1/27/2006 Board Meeting

Scope of Seismic Re-Engineering Project

• Comparison of Standards—Structural Engineering

– Verify

• Slope Stability Above VMT—Geologic

Engineering

– Investigate

• Underwater sediment slumping – Marine

Geophysical Surveying

– Investigate

1/27/2006 Board Meeting

Action Requested

• Approve resolution supporting retention of

the Alaska Seismic Hazards Safety Commission by passage of HB-83.

1/27/2006 Board Meeting

End of Presentation