COLUMBIA GULF TRANSMISSION, LLC — Gas transmission and gathering — incident on 2014-04-25

Gas transmission and gathering incident in DELHI, MADISON County, LA. Reported cause: MATERIAL FAILURE OF PIPE OR WELD. Reported consequences: 0 fatalities, 0 injuries, 1302.91 NATURAL GAS released, $203,791 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20140056.

Operator ID: 2620.

Reported incident date: 4/25/2014 11:00.

Location detail: 3.24

Cause detail: DESIGN-, CONSTRUCTION-, INSTALLATION-, OR FABRICATION-RELATED

Cause detail: COMPANY PERSONNEL WERE PERFORMING A REPAIR ON A GRADE 2 LEAK ON A NEARBY LINE WHEN THEY DISCOVERED A CRACK IN THE WELD OF A 2 INCH TAP ON LINE 300. THE SECTION OF LINE 300 CONTAINING THE LEAK WAS ISOLATED BETWEEN THE COMPRESSOR STATION AND VALVE 808-3; APPROXIMATELY 8.66 MILES AND THE LINE WAS BLOWN DOWN. THE TOTAL ESTIMATED AMOUNT OF UNINTENTIONAL MATERIAL THAT VENTED INTO ATMOSPHERE DURING THIS EVENT THIS LEAK DID NOT EXCEED 3,000 MCF. FURTHER EVALUATION BY THE COMPANY'S ENGINEERING AND PROJECT MANAGEMENT GROUPS DETERMINED THE COST OF REPAIR AND WORK NECESSARY TO BRING THE ISOLATED SECTION OF LINE 300 BACK INTO SERVICE, WOULD EXCEED $50,000. BASED UPON THIS DETERMINATION THE NATIONAL RESPONSE CENTER WAS NOTIFIED. OVER THE COURSE OF THE NEXT 2 DAYS, THE CRACK WAS INVESTIGATED AND REPAIRED. ON APRIL 27, THE LINE WAS PURGED AND RETURNED BACK INTO SERVICE. BASED ON VISUAL EXAMINATION, METALLURGICAL ANALYSES AND MATERIAL ANALYSES, THE METALLURGICAL FAILURE INVESTIGATION PERSONNEL CONCLUDED THAT THE LEAK WAS CAUSED BY A CRACK THROUGH THE WALL OF A 2-IN WELD-O-LET ON THE 36-INCH DIAMETER PIPE CAUSED BY FATIGUE. AS SHOWN ON PAGE 1 OF THIS REPORT, THE INITIAL INCIDENT REPORT WAS SUBMITTED ON MAY 22, 2014 AND THE ASSIGNED REPORT NUMBER WAS: 20140056 - 16407

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: MATERIAL FAILURE OF PIPE OR WELD — CONSTRUCTION, INSTALLATION OR FABRICATION-RELATED.

PHMSA indexed costs: $289,450 reported total cost, $162,663.47 in 1984 dollars, $327,417.862 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.