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Earthquake Risk Management Program

Pacific Gas & Electric Company

Kent Ferre, SEManager

Geosciences Department

Northern California Earthquake Hazards Workshop12 February 2014

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PG&E’s Service Territory

• 70,000 Square Miles

• 15 Million People Served

• 4.3 Million Gas Customers

• 5.1 Million Electric Customers

• 3,400 Buildings

Fun Facts:

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Mega Infrastructure!

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Fault Crossing Mitigation

Line 103 San Andreas Fault Crossing – Creeping Section

Installed in 1930 – 44” total displacement after 83 years!

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Lifelines Research

Qualification Testing of High Voltage Electrical Equipment

• Transformer Bushings

• Switches

• CCVTs

• Circuit Breakers

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Lifelines Research – Advanced Assessments

•8-story steel moment frame

•Pre-Northridge connections

•Performance evaluated using a probabilistic approach

•Predicted tagging based on capacity to withstand aftershocks

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Lifelines Research

Non-code compliant - out-of-plane anchorage testing

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Iso-Base

Vacaville GCC

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Restoration Concept—SF

Potrero A

Martin H

Mission X

Embarcadero ZLarkin Y

3.8 mi, 230kV single circuit

4th at Folsom

2.3 mi, 230kV single circuit115kV single circuit (on common poles)

0.6 mi, 230kV single circuit

0.6 mi, 115kV single circuit 1.2 mi, 115kV

single circuit

H-Z (230kV)

A-X(115kV)

A-Y (115kV)

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Oakland Underground Cable Restoration

Oakland D

Clairemont K

KD-2 (Existing UG)

KD (Option A, New OH full distance), 2.6 mi

KD-1 (Existing UG)

KD-2 (Option B, New OH Line), 0.5 mi

KD-1 (Option B, New OH Line),

0.3 mi

Transition point, Typ.

Hayward Fault

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Emergency ResponseDASH for Corporate Real Estate

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In Conclusion:

An effective seismic risk management program

+ highly technical, dedicated staff

+ accountability

+ management support

+ effective communication

= An acceptable level of earthquake risk