ENABLE GAS TRANSMISSION, LLC

Incident Narrative

DURING A ROUTINE PATROL, A SMALL LEAK WAS DISCOVERED ON EGT LINE BM-21. ENABLE OPERATIONS REMOVED DIRT FROM THE AFFECTED AREA AND FOUND THE MINOR LEAK TO BE COMING FROM A LEGACY GIRTH WELD THAT HAD A CLAMP INSTALLED OVER IT. THE WELD WAS COMPLETED IN 1957 AND IT CANNOT BE DETERMINED WHEN THE CLAMP WAS INSTALLED. THE LINE WAS LOWERED 20% AFTER DISCOVERY AND REMEDIATION IS PLANNED TO BEGIN IN LATE JUNE. CURRENTLY, THE LINE IS OPERATING AT REDUCED PRESSURE AND SNIFFED PERIODICALLY. AT THE LOWERED OPERATING PRESSURE THE LEAK CANNOT BE DETECTED USING LEAK DETECTION EQUIPMENT. STOPPLES WILL BE INSTALLED ALLOWING CUSTOMERS TO MAINTAIN SERVICE. REPAIR IS EXPECTED TO EXCEED $50,000. WHEN THE REPAIR IS COMPLETE A SUPPLEMENTAL REPORT WILL BE COMPLETED. THE LINE WAS REPAIRED ON JULY 15TH AND THE LINE WAS RETURNED TO NORMAL OPERATING PRESSURE ON JULY 16TH. THE LEAK WAS DUE TO CORROSION IN THE LEGACY WELD AND CLAMP. THE NRC (#1275515) WAS NOTIFIED ON 4/16/2020 AND A 48 HOUR FOLLOW UP (#1275610) WAS PROVIDED ON 4/18/20. SUPPLEMENTAL 07/27/2020 PART A.5 32.214456 TO 35.214456 PART D.7.C ADDED $1,000 PART H. NARRATIVE SUPPLEMENTAL 10/02/2020 PART H NARRATIVE BT-21 CHANGED TO BM-21 SUPPLEMENTAL 10/20/2022 PART B CLEBURNE COUNTY CHANGED TO FAULKNER COUNTY PART H NARRATIVE BT-21 CHANGED TO BM-21