San Bruno Incident Report   


 Transcripts of Examinations Under Oath: The CPUC conducted a number of examinations under oath during its investigation. 

On September 9, 2010, a 30-inch diameter natural gas transmission pipeline, owned and operated by Pacific Gas and Electric Company (PG&E) ruptured in San Bruno, California.  Gas escaping from the rupture ignited resulting in the loss of eight lives, injuries to 58 people, destruction of 38 homes, and damage to 70 other homes.

On Jan. 12, 2012, the CPUC voted to open a penalty consideration case (I.12-01-007) to determine whether PG&E violated the law in its natural gas pipeline operations, and if so what remedies should be imposed to ensure public safety.

In opening the penalty consideration case, the CPUC considered a report from the Consumer Protection and Safety Division that determined that PG&E violated the Public Utilities Code, several federal and state pipeline safety regulations and failed to follow accepted industry standards.

Supporting Documents

Independent Review Panel 

The CPUC formed an Independent Review Panel to investigate the San Bruno incident. The panel issued its report in June 2011.

CPUC Decisions 

Miscellaneous CPUC-Published Documents 

PG&E Risk Management Procedures 

NTSB-Published Sources 

The National Transportation and Safety Board investigated in tandem with the California Public Utilities Commission the causes of the San Bruno Incident.  They published their report in August 2011.  You can find the report and the docket on their website.

US Department of Transportation Pipeline and Hazardous Materials Safety Administration (PHMSA) 

Other Documents

Aug. 21, 2012: Overland Consulting Financial Analysis of PG&E Corporation 




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