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Timeline: Natural Gas Pipeline Safety

Information on Hydrotesting and In-Line Inspection

Proceeding: Setting New Rules for Safe, Reliable Operation of State’s Natural Gas Pipelines (R.11-02-019)

Proceeding: Penalty Consideration Regarding PG&E Gas Pipeline Recordkeeping (I.11-02-016)


April 20, 2015: CPUC Continues Investigation of PG&E Pipeline Explosion in Fresno to Determine Cause of Pipeline Failure

April 9, 2015: CPUC Penalizes PG&E $1.6 Billion for Pipeline Violations

March 13, 2015: CPUC President Proposes $1.6 Billion in Remedies in PG&E Pipeline Cases, Increasing Penalty Amount by $200 Million and Directing $850 Million to Shareholder-Funded Safety Improvements

Nov. 20, 2014: CPUC Issues $10.85 Million Staff Citation to PG&E; Commissioners Open Formal Case To Evaluate PG&E’s Gas Distribution Recordkeeping


September 19, 2014: NTSB Responds to Status Report

August 27, 2014: NTSB Status Report

August 27, 2014: IRP Status Report

August 14, 2014: CPUC Status Report to the NTSB on Progress Made Toward Safety Recommendations

December 19, 2013: CPUC Fines PG&E $14.35 Million for Ethics Violations

July 16, 2013: CPUC Staff Amended Brief on Fines and remedies in PG&E Enforcement Cases

June 26, 2013: CPUC Comments on Staffing Changes To PG&E Enforcement Cases 

June 3, 2013: CPUC Letter to NTSB on Progress Made in Addressing Safety Recommendations

March 2, 2013: NTSB Letter to Governor Brown re: Closing as Acceptable Safety Recommendation P-11-21


Dec. 20, 2012: CPUC Approves Pipeline Safety Plan For PG&E; Increases Whistleblower Protections

Nov. 1, 2012: CPSD Status Report Filing (I.12-01-007, I.11-02-016, I.11-11-009)

Oct 26, 2012CPUC urges parties to PG&E Pipeline Cases to continue talks; withdraws mediator

Oct. 15, 2012: Former U.S. Senator George Mitchell Appointed as Mediator for Negotiations Over PG&E San Bruno Pipeline Explosion Fines and Remedies

Oct. 5, 2012: Natural Gas Safety Action Plan – Oct. 2012

Oct. 5. 2012: CPSD Motion to Suspend Proceedings in Order to Facilitate Negotiations (I.12-01-007)

Oct. 23, 2012: Safety Leadership Conference, L.A.

Sept. 13, 2012: San Francisco Cast Iron Gas Pipe Replacement

Sept. 5, 2012: CPUC staff investigation finds no fault with PG&E weld practices

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

June 26, 2012: Safety Leadership Conference

May 7, 2012: CPUC Letter to NTSB re: Status of CPUC Implementation of Recommendations Related to San Bruno Tragedy

May 7, 2012: Gas Pipeline Safety Update

April 19, 2012: CPUC Affirms Citation and Fine Against PG&E

April 12, 2012: CPUC Supports National Dig Month and Reminds Californians to Call 811 Before Digging

April 4, 2012: CPUC Welcomes Brigadier General (CA) Jack Hagan as Consumer Protection and Safety Director

March 2012: CPUC Proposal Aims to Improve Public Access to Documents

March 14, 2012: Risk Assessment Unit Report on Status and Initial Recommendations

March 12, 2012: Reference Documents for CPSD Reports in Recordkeeping Penalty Consideration Case

March 7, 2012: Second Educational Symposium Regarding Hydrostatic Testing of Natural Gas Pipelines

March 5, 2012: CPUC Executive Director's letter to PG&E re: funding independent consultants to review safety and security proposals in PG&E's 2014 rate case.

Feb. 17, 2012: CPUC Response Letter to PHMSA's 2010 Program Evaluation Letter

Feb. 16, 2012: CPUC Sponsors Legislative Bills to Obtain Needed Safety and Enforcement Tools

Feb. 13, 2012: CPUC Follows-Up on Allegations Regarding PG&E Pipeline Work

Jan. 31, 2012: CPUC Issues Joint Statement of President Peevey and Commissioner Florio Regarding PG&E Pipeline Rupture Case

Jan. 27, 2012: CPUC Fines PG&E $16 Million Through Citation Program

Jan. 2012: Overview of CPUC Actions in Response to NTSB and Independent Review Panel Recommendations

Jan. 12, 2012: System Safety & Security in Ratemaking Workshop

Dec. 15, 2011: CPUC Lifts Pressure Restrictions on Certain PG&E Pipelines Following Review

Dec. 8, 2011: CPUC Issues RFP Seeking Expert to Audit Natural Gas Safety and Reliability Program

Dec. 1, 2011: CPUC Expands Gas Safety Enforcement Tools With New Citation Program

Nov. 10, 2011: CPUC Begins Penalty Consideration Case Regarding Alleged PG&E Pipeline Classification Violations

Oct. 18, 2011: CPUC President Comments on PG&E Hiring of Former NTSB Chair to Advise on Natural Gas Safety

Oct. 6, 2011: CPUC Lifts Pressure Restriction on PG&E’s Topock Compressor Station

Sept. 26, 2011: NTSB Releases Report

Sept. 22, 2011: Proposed Decision authorizing PG&E to restore the Maximum Allowable Operating Pressure of the suction side of the Topock Compressor Station to 660 pounds per square inch gage.

Sept. 15, 2011: CPUC Letter to Honorable Roger Dickinson, Chair, Assembly Committee on Accountability and Administrative Review

Sept. 8, 2011: CPUC Orders PG&E to Use Public Process to Request Authorization to Restore Pipeline Pressure to Previous Operating Levels

August 30, 2011: CPUC Comments on NTSB Findings Regarding PG&E Pipeline Rupture in San Bruno

August 26, 2011: Utilities File Implementation Plans

August 17, 2011: CPUC Presentation to the Assembly Committee on Accountability and Administrative Review

August 9, 2011: CPUC Reminds Californians to Call 811 Before Digging

August 9, 2011: CPUC Welcomes New Leadership to PG&E Corporation

July 22, 2011: CPUC Embarks on Search for New Safety Director

July 7, 2011: CPUC Elevates Pipeline Safety With Creation of New Risk Assessment Unit and More Inspectors

July 1, 2011: PG&E 6/30/11 Letter to the CPUC on Class Location Designation

June 9, 2011: CPUC Orders All California Gas Transmission Operators to Test or Replace Pipeline Not Previously Pressure Tested

June 9, 2011: Independent Review Panel Releases Report

May 13, 2011: CPUC response to Representative Speier's request

May 10, 2011: PG&E Report on Status of MAOP Validation

May 10, 2011: Proposed Decision Issued re: Determining Maximum Allowable Operating Pressure; Requires Filing Of Natural Gas Transmission Pipeline Replacement Or Testing Implementation Plans

May 6, 2011: Educational Symposium on Hydrostatic Testing of Natural Gas Pipeline

May 3, 2011: CPUC staff letter to Sempra re: MAOP Validation Submission

April 26, 2011: CPUC response letter to PG&E concerning MAOP Validation Methodology

April 15, 2011: Sempra Responds to CPUC Directive re: NTSB Safety Recommendations

April 14, 2011: CPUC Approves Settlement in PG&E Gas Transmission and Storage Case and Calls for Semi-Annual Safety Report

April 1, 2011: Congresswoman Speier's letter to the CPUC with proposals for natural gas transmission line safety

March 29, 2011: NTSB letter to CPUC requesting periodic updates on implementing Safety Recommendations

March 24, 2011: CPUC to Consider $6 Million Fine Against PG&E for Non-Compliance With Pipeline Records Search Order

March 21, 2011: PG&E's supplement to its March 15th report on pipeline records search

March 17, 2011: CPUC Considers Adding Item to March 24 Meeting

March 16, 2011: CPUC Demands Records From PG&E After Utility Fails to Comply with CPUC Orders; CPUC Staff to Recommend Fines and Penalties

March 15, 2011: Proposed Decision Issued in PG&E Gas Transmission and Storage Case

March 15, 2011: PG&E's response to CPUC's order to aggressively and diligently search for pipeline records.  

March 11, 2011: PG&E agrees to reimburse the CPUC for its costs incurred in investigating the causes of the San Bruno rupture and for the costs of any other CPUC investigation that stems from it.

March 8, 2011: CPUC response letter to Assemblyman Hill re: re: PG&E records search

March 8, 2011: Letter from Assemblyman Hill to CPUC re: PG&E records search

March 1-3, 2011: NTSB Hearings

Feb. 24, 2011: CPUC Begins Penalty Consideration Regarding PG&E Gas Pipeline Recordkeeping

Feb. 24, 2011: CPUC to Set New Rules for Safe, Reliable Operation of State’s Natural Gas Pipelines

Feb. 22, 2011: CPUC Unveils Proposed Natural Gas Pipeline Safety Proceeding

Feb. 11, 2011: PG&E's Top 100 Segments 2007-2009 - Updated March 9, 2011

Feb. 9, 2011: Documents on Pipeline Safety - New documents may be added to this page periodically

Feb. 8, 2011: Independent Review Panel's Interim Report, Feb. 7, 2011

Feb. 7, 2011: CPUC Reply Letter to Assembly Member Hill's Jan. 19, 2011, Letter

Feb. 2, 2011: CPUC Orders PG&E to Reduce Operating Pressure on Additional Gas Transmission Pipelines

Feb. 1, 2011: PG&E Files Information on Actions re: CPUC Directive re: NTSB Safety Recommendations

Feb. 1, 2011: PG&E’s Accelerated Gas Transmission System Aerial and Ground Leak Survey Trends Report

Feb. 1, 2011: Sempra's Response to Jan. 3, 2011, CPUC Directive

Jan. 21, 2011: Southwest Gas Corporation's Response to Jan. 3, 2011, CPUC Directive

Jan. 13, 2011: CPUC Sets March 15 Deadline for PG&E to Comply With Pipeline Records Search Related to San Bruno Explosion

Jan. 7, 2011: PG&E Responds to CPUC directive re: NTSB safety recommendations

Jan. 7, 2011: PG&E Response to Data Request re: hydro tested pipeline

Jan 7, 2011: PG&E Response to Data Request re: miles of pipe in the Bay Area that have been hydro-tested

Jan. 3, 2011: CPUC Response to NTSB Safety Recommendation Letter re: San Bruno Pipeline Explosion

Dec.16, 2010: CPUC Executive Director Letter to PG&E re: Safety Response to the NTSB Advisory of Dec. 14, 2010  

Nov. 23, 2010: CPUC Response Letter to Senator Padilla re: hiring additional inspectors

Oct. 28, 2010: CPUC Gives Rate Relief to San Bruno Customers; Ensures Safe Natural Gas Supply for Winter

Oct. 27, 2010: PG&E Letter to San Bruno Mayor Ruane committing to not rebuild the damaged section of Line 132 in its current location.

Oct. 25, 2010: PG&E Response to CPUC Directives (in CPUC letters dated Sept. 13, Sept. 17, Oct. 15, and CPUC Res. L-403):

  • Assessment of gas transmission pipelines in the San Bruno area
  • Preliminary report on the replacement or retrofit of manually operated valves with automatically or remotely controlled valves on PG&E gas transmission pipelines.
  • Accelerated gas system survey initial report.
  • Curtailment plans.

CPUC Levied Fines and Restitution - 1999 to Present

CPUC's Safety and Enforcement Role

CPUC's Utility Safety Graduated Enforcement Program

Oct. 14, 2010: CPUC Announces Expert Panelists for Independent Study of San Bruno Explosion

Oct. 11, 2010: CPUC Considers Adding Item to Oct. 14 Meeting

Oct. 8, 2010: Pipeline Safety Q&A

Oct. 5, 2010: PG&E letter requesting extension to supply certain information

Oct. 4, 2010: PG&E Response to questions 4,9, and 10 of the CPUC's Sept. 13, 2010, letter and Ordering Paragraphs 13, 18, 19, and 20 of CPUC Resolution L-403

Sept. 23, 2010: CPUC Approves Establishment of Expert Panel to Study San Bruno Explosion

Sept. 20, 2010: CPUC Provides Information on PG&E Natural Gas Pipelines

Sept. 17, 2010: CPUC Executive Director Letter to PG&E re: Questions About San Bruno Pipeline Explosion

Sept. 15, 2010: ALJ Ruling requesting that parties file comments by Sept. 20th on whether the proposed settlement in PG&E's gas transmission and storage application is adequate in light of the pipeline safety, integrity, and reliability concerns raised by the San Bruno explosion. 

Sept. 13, 2010: CPUC Executive Director Letter to PG&E

Sept. 12, 2010: CPUC Orders PG&E to Take Specific Action Related to San Bruno Explosion, Including Inspection of Natural Gas System

Sept. 10, 2010: CPUC Establishes Phone Number and Email Address for Tips to Aid in Investigation of San Bruno Explosion

Sept. 9, 2010: CPUC Investigates San Bruno Explosion and Fire


CPUC Remembers Jacqueline Greig


Last Modified: 4/20/2015

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