TENNESSEE GAS PIPELINE CO (EL PASO) — Gas transmission and gathering — incident on 2011-08-22

Gas transmission and gathering incident in LA. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 4 NATURAL GAS released, $759,503 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: 20110350.

Operator ID: 19160.

Reported incident date: 8/22/2011 9:25.

Cause detail: INTERNAL CORROSION

Cause detail: A LOCAL LANDOWNER IN THE LOUISIANA COASTAL MARSH AREA REPORTED SEEING A SMALL SHEEN OF LIQUID IN THE VICINITY OF TENNESEE GAS PIPELINE'S (TGP) 26" 523M-100 LINE. TGP PERSONNEL INVESTIGATED AND DISPATCHED DIVERS WHO CONFIRMED A PINHOLE LEAK IN THE BODY OF THE PIPE. TGP ALSO MOBILIZED A LIQUID CLEAN-UP CONTRACTOR TO ADDRESS THE SMALL LIQUID ACCUMULATION. A CLAMP WAS INSTALLED OVER THE PINHOLE IN THE PIPE AND THE LINE WILL REMAIN SHUT IN FOR ABANDONMENT. SUBSEQUENT TO THIS AUGUST 22, 2011 REPORT, SEVERAL OTHER LEAKS OCCURRED THAT ONLY INVOLVED SMALL SHEENS AND DID NOT INVOLVE ANY ASSOCIATED GAS RELEASE. THE PIPELINE HAD BEEN TAKEN OUT OF SERVICE AND WAS AWAITING ABANDONMENT. THESE ARE NOTED HERE PURSUANT TO APPROVAL TO DO SO FROM MR. GENE ROBERSON, PHMSA SW REGION: 11/7/2011 NRC NO. 994780; 12/6/2011 NRC NO. 997331; 3/23/2012 NRC NO. 1006704.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: CORROSION — INTERNAL.

PHMSA indexed costs: $1,127,519 reported total cost, $607,726.792 in 1984 dollars, $1,481,035.623 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.