ANR PIPELINE CO — Gas transmission and gathering — incident on 2014-01-17

Gas transmission and gathering incident. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 5000 NATURAL GAS released, $135,000 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: 20140020.

Operator ID: 405.

Reported incident date: 1/17/2014 9:15.

Cause detail: NON-THREADED CONNECTION FAILURE

Cause detail: AT ABOUT 9:11 A.M. CST ON FRIDAY (JANUARY 17), A POTENTIAL LEAK WAS DETECTED ON THE TC OFFSHORE SYSTEM'S SOUTHEAST AREA EAST LEG, LOCATED IN EUGENE ISLAND BLOCK 115, ABOUT 70 MILES WEST OF PATTERSON, LA. AN EXPERIENCED DIVE TEAM DISPATCHED TO THE SITE ON FRIDAY CONFIRMED THERE IS A MINOR LEAK ON THE TIE-IN ASSEMBLY THAT CONNECTS TCO"S 12-INCH DIAMETER PIPELINE SYSTEM WITH THE COMPANY'S 20-INCH DIAMETER PIPELINE SYSTEM. BECAUSE OF THE LOCATION OF THE LEAK, A LATERAL PIPELINE CONNECTED TO THE TIE-IN ASSEMBLY WILL HAVE TO BE ISOLATED AND BLOWN DOWN IN ORDER TO MAKE THE REPAIRS. ONCE THE LEAK WAS CONFIRMED AND INITIAL REPAIR ASSESSMENTS MADE, TCO PERSONNEL IMMEDIATELY BEGAN WORKING ON A PLAN TO REPAIR THE LINE. THE PIPELINE WAS SUBSEQUENTLY REPAIRED DURING THE WEEK OF FEB. 17. 2014. DIVERS WERE ABLE TO REPALCE A DAMAGED GASKET ON THE FLANGE IN THE SS VALVE ASSEMBY AND PLACED THE PIPELINE BACK INTO SERVICE.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — NON-THREADED CONNECTION FAILURE.

PHMSA indexed costs: $195,000 reported total cost, $106,320.56 in 1984 dollars, $227,665.751 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.