Timeline: Natural Gas Pipeline Safety


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 

Appendix A & B 

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 20, 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, 2012:CPUC urges parties to PG&E Pipeline Cases to continue talks; withdraws mediator 

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

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 (Updated April 2013) 

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

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 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. 

February 21, 2012: CPUC Levied Fines and Restitution - 1999 to February 21, 2012 

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 

Feb. 13, 2012: CPUC Proposal Aims to Improve Public Access to Documents  

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

Read the Citation 

Appeal of Citation, filed Feb. 1, 2012 

ALJ's Draft Decision Denying Appeal, March 19, 2012 

Read the Press Release 

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

Jan. 11, 2012: System Safety & Security in Ratemaking Workshop 


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

Dec. 7, 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 San Bruno Incident Investigation 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


Southwest Gas 


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 

June 30, 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 

Complete 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 

March24, 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 (I.11-02-016) 

Feb. 24, 2011: CPUC to Set New Rules for Safe, Reliable Operation of State’s Natural Gas Pipelines (Proceeding R.11-02-019) 

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. 7, 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.

Oct. 2010: CPUC's Safety and Enforcement Role 

Oct. 2010: CPUC's Utility Safety Graduated Enforcement Program  

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

Oct. 8, 2010: CPUC Considers Adding Item to Oct. 14 Meeting 

Oct. 8, 2010: Pipeline Safety Q&A 

Oct. 12, 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  

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