TENNESSEE GAS PIPELINE COMPANY — Gas transmission and gathering — incident on 2013-01-02

Gas transmission and gathering incident in BAY SAINT LOUIS, HANCOCK County, MS. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 22000 NATURAL GAS released, $0 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: 20130002.

Operator ID: 19160.

Reported incident date: 1/2/2013 3:43.

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: ON JANUARY 2, 2013, A 8-INCH X DOUIBLE 8-INCH RELIEF VALVE MALFUNCTIONED AT TENNESSEE GAS PIPELINE'S BAY SAINT LOUIS COMPRESSOR STATION IN BAY SAINT LOUIS, MS. THE RELIEF VALVE RELEASED NATURAL GAS TO THE ATMOSPHERE FOR APPROXIMATELY 25 MINUTES AND EXCEEDED PHMSA'S REPORTABLE QUANTITY THRESHOLD FOR A PIPELINE INCIDENT. THE RELIEF VALVE WAS ISOLATED BY CLOSING A VALVE BENEATH IT. RELIEF VAVLE WAS CLEANED, SET, AND RETURNED TO SERVICE.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $88,000 reported total cost, $71,229.508 in 1984 dollars, $87,459.016 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.