ANR PIPELINE CO — Gas transmission and gathering — incident on 2013-05-22

Gas transmission and gathering incident. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 1000 NATURAL GAS released, $270,000 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: 20130054.

Operator ID: 405.

Reported incident date: 5/22/2013 16:00.

Cause detail: INTERNAL CORROSION

Cause detail: 05/22/13, RECEIVED A CALL FROM GAS CONTROL STATING THE PRODUCER (APACHE) AT SOUTH MARSH ISLAND 137 CALLED IN A REPORT OF A POSSIBLE LEAK ON TCO FACILITIES. AFTER INVESTIGATING IT WAS DETERMINED, THE LEAK WAS GAS ONLY WITH NO SHEEN VERY NEAR THE 12", LINE 619 TRANSCANADA OFFSHORE LATERAL. EXTERNAL AND INTERNAL NOTIFICATIONS WERE MADE AS WELL AS CONTACT WITH THE PRODUCER AT THE FACILITY. THE PRODUCER HAD ALREADY SHUT-IN GAS PRODUCTION FROM THAT FACILITY WHICH IS THE ONLY PRODUCTION ON THE LATERAL. PLANS ARE IN PLACE TO HAVE A DIVE BOAT CLOSE AN ISOLATION VALVE AND A INVESTIGATION DIVE AT THE LOCATION OF THE LEAK. THE NRC INCIDENT NUMBER IS 1048006. THE PIEPLINE WAS REPAIRED ON 6/14/2013 BY INSTALLING A REPAIR CLAMP OVER THE LEAK AREA. THE PIPELINE WAS SUBSEQUENTLY PLACED BACK INTO SERVICE.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: CORROSION — INTERNAL.

PHMSA indexed costs: $290,000 reported total cost, $154,380.91 in 1984 dollars, $365,199.94 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.