ENABLE GAS TRANSMISSION, LLC

Incident Narrative

ON SEPTEMBER 13TH ENABLE MIDSTREAM PARTNERS RECEIVED NOTIFICATION FROM THE LOCAL DISTRIBUTION COMPANY (LDC) OF A POSSIBLE MINOR LEAK ON ENABLE GAS TRANSMISSION LINE K-NORTH. THE POSSIBLE LEAK WAS IN SMACKOVER, ARKANSAS. ON 9/13/21 ENABLE EXCAVATED AND DID CONFIRM A MINOR LEAK WAS ORIGINATING FROM AN OLD-STYLE CLAMP LEAKING AT THE TAP VALVE THREADS ON LINE K-NORTH. THIS TAP ON LINE K-NORTH FEEDS 5 DOMESTIC CUSTOMERS IN THE AREA. A 20% REDUCTION IN PRESSURE WAS IMMEDIATELY IMPLEMENTED ON 9/13. A REPAIR PLAN WAS DETERMINED ON 9/14 THAT WOULD REPLACE THIS SECTION OF 12"" PIPELINE REMOVING THE BOLT ON CLAMP. TO KEEP THE DOMESTIC CUSTOMERS SUPPLIED WITH GAS DURING REPAIR, STOPPLES WOULD NEED TO BE INSTALLED PRIOR TO PIPE REPLACEMENT. PRIOR TO STOPPLE REPLACEMENT, REINFORCING SLEEVES WOULD NEED TO BE INSTALLED ON THE FIRST 3 DRESSER COUPLERS JOINTS UPSTREAM AND DOWNSTREAM OF THE LEAK TO STABILIZE THE LINE FOR STOPPLE INSTALLATION. IT WAS DETERMINED AT THIS TIME THAT THE REPAIR WOULD EXCEED THE $122,000 THRESHOLD FOR AN INCIDENT. A CALL WAS PLACED TO THE NRC ON 9/14/2021 (#1316739) AND THE 48 HR. FOLLOW UP WAS PLACED ON 9/16/2021 (#1316931). THE LINE WAS REPAIRED ON 9/16. SUPPLEMENTAL 10/20/22: PART B CHANGED CALHOUN COUNTY TO UNION COUNTY