ENBRIDGE PIPELINES (EAST TEXAS) L.P. — Gas transmission and gathering — incident on 2014-01-26

Gas transmission and gathering incident in GOODRICH, POLK County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 78042 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: 20140023.

Operator ID: 31613.

Reported incident date: 1/26/2014 8:45.

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: AT 8:45 THE CONTROL CENTER NOTIFIED OPERATIONS THAT A PRESSURE DROP WAS INDICATED ON THE DD AND CLARITY SYSTEM. OPERATIONS WAS DISPACHED AND ARRIVED AT THE GOODRICH COMPRESSOR STATION AT 09:15. OPERATIONS FOUND THE COMPRESSOR STATION HAD EXPERIENCED A POWER FAILURE CAUSING AN ESD OF THE STATION. A 20" SUCTION VALVE FAILED TO CLOSE DURING THE ESD ALLOWING ADDITIONAL GAS TO BE BLOWN DOWN. THE VALVE WAS MANUALLY SHUT AT 09:35 AND PRESSURE BEGAN TO INCREASE TO NORMAL OPERATING PRESSURE. REPORTED DUE TO UNINTENIONAL GAS LOSS EXCEEDING THE 3 MMCF LIMIT AND THE COST OF GAS LOSS EXCEEDING $50,000.

PHMSA trend classification: significant incident, not serious.

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

PHMSA indexed costs: $390,210 reported total cost, $269,935.114 in 1984 dollars, $331,439.317 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.