TENNESSEE GAS PIPELINE CO (EL PASO) — Gas transmission and gathering — incident on 2011-07-08

Gas transmission and gathering incident. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 1000 NATURAL GAS released, $673,214 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: 20110261.

Operator ID: 19160.

Reported incident date: 7/8/2011 11:42.

Cause detail: INTERNAL CORROSION

Cause detail: BOEMRE OBSERVED BUBBLES AND A LIGHT SHEEN IN THE VICINITY OF TENNESEE GAS PIPELINE'S (TGP) FACILITIES ON THE OCS IN EUGENE ISLAND BLOCK 320. BOEMRE CONTACTED THE COAST GUARD WHO CONTACTED TGP GAS CONTROL. THE LEAK WAS DETERMINED TO BE COMING FROM TGP'S 30" 523M-2300 PIPELINE WHICH WAS ISOLATED DUE TO PENDING ABANDONMENT AND UNDER ONLY 247 PSIG OF GAS PRESSURE. DIVERS DETERMINED A PIN HOLE LEAK TO BE THE CAUSE AND REPAIRED WITH A CLAMP. ABANDONMENT OF THE LINE WILL PROCEED. SUBSEQUENT TO THE ABOVE JULY 8, 2011 OCCURRENCE, THERE WAS A LEAK FROM THIS TGP 523M-2300 PIPELINE THAT INVOLVED ONLY LIQUIDS AND RESULTED IN A SMALL SHEEN ON FEBRUARY 3, 2012. THERE WAS NO GAS RELEASED. CONSEQUENTLY, PURSUANT TO APPROVAL TO DO SO FROM MR. GENE ROBERSON, PHMSA SW REGION, THIS IS BEING NOTED HERE AND IT WAS ASSIGNED NRC NO. 1002085.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: CORROSION — INTERNAL.

PHMSA indexed costs: $791,242 reported total cost, $443,253.364 in 1984 dollars, $992,676.806 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.