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TENNESSEE GAS PIPELINE COMPANY

gas_transmission Incident —

Incident Information

Report Date—
OperatorTENNESSEE GAS PIPELINE COMPANY
Commodity—
Pipeline Typegas_transmission

Location

State
Coordinates29.52179, -89.72058

Cause

CauseOTHER INCIDENT CAUSE
Subcause—

Casualties

Fatalities0
Injuries0

Costs

Property Damage—
Lost Commodity—
Public/Private Damage—
Emergency Response—
Environmental Remediation—
Other Costs—

Location Map

Incident Narrative

AT APPROXIMATELY 7:55 PM ON 5/19/2020, KINDER MORGAN RECEIVED AN EMAIL FROM PHMSA. IT STATED THAT A PRIVATE CITIZEN REPORTED TO THE NRC, THAT THERE WERE BUBBLES IN THE RIVER NEAR THE TENNESSEE GAS PIPELINE COMPANY (TGP) - 500 SYSTEM LINES, LOCATED IN PLAQUEMINES PARISH, LOUISIANA, ON THE EASTERN SIDE OF THE MISSISSIPPI RIVER. TGP OPERATIONS PERSONNEL STARTED THE GAS LEAK INVESTIGATION. AT 10:30 PM, TGP CONFIRMED THE GAS LEAK ON LINE 500-1 AND STARTED THE EMERGENCY RESPONSE LINE (ERL) PROTOCOL. THE LINE WAS ISOLATED AND BLOWN DOWN. TGP CONSULTED WITH A DIVE COMPANY TO SURVEY LINE 500-1. HOWEVER, THE CURRENT RIVER CONDITIONS PREVENTS THE DIVER FROM SAFELY REACHING AND ASSESSING THE LEAK. GIVEN THESE CONDITIONS ON 5/27/2020, TGP HIRED T BAKER SMITH (TBS) TO PERFORM A SONAR SURVEY TO MAP THE LEAK LOCATION. ON 6/15/2020, TGP RECEIVED THE FINAL REPORT FROM TBS. THE INITIAL ASSESSMENT SHOWED UNSUPPORTED PIPE EXPOSURE. THIS EXPOSURE COULD LIMIT THE RUNNING OF A ILI ASSESSMENT IN ITS CURRENT STATE AS NOTED IN SECTION E8. TGP IS ASSESSING THE DATA IN ORDER TO ESTABLISH A PATH FORWARD. THE LINE WILL REMAIN BLOWN DOWN AND ISOLATED UNTIL PERMANENT REPAIRS CAN BE MADE. TEMPORARY LEAK CLAMP HAS BEEN INSTALLED TO PREVENT WATER FROM ENTERING THE PIPELINE AND WILL REMAIN IN PLACE UNTIL PERMANENT REPAIR PROCESS IS COMPLETED. TGP IS FABRICATING A STRUCTURAL CLAMP AS A PERMANENT REPAIR. THE STRUCTURAL CLAMP IS PROJECTED TO BE INSTALLED BY THE END OF 2022. TGP WILL PROVIDE A SUPPLEMENTAL REPORT AS PROJECT UPDATES ARE OBTAINED. TGP PLACED THE PIPELINE SEGMENT BACK IN SERVICE AUGUST 16, 2024. PERMANENT REPAIRS BEGAN ON IN MID-JANUARY 2024, WORK HAD TO BE DELAYED OFF AND ON DUE TO RIVER RISE AND CURRENTS WHICH DID NOT ALLOW FOR SAFE WORKING CONDITIONS. WORK WAS COMPLETED IN EARLY JUNE 2024 BUT PURGE AND LOAD ACTIVITIES IN ORDER TO PLACE THE SEGMENT BACK IN SERVICE WERE DELAYED DUE TO OTHER WORK IN THE VICINITY OF THE SEGMENT. LEAK TESTING WAS COMPLETED, AND THE SEGMENT WAS PLACED BACK IN SERVICE ON AUGUST 16, 2024.

About This Pipeline Incident

Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.

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