NATIONAL FUEL GAS SUPPLY CORP — Gas transmission and gathering — incident on 2013-06-22

Gas transmission and gathering incident in RED HOUSE, CATTARAGUS County, NY. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 6486 NATURAL GAS released, $20,000 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: 20130067.

Operator ID: 13063.

Reported incident date: 6/22/2013 0:04.

Location detail: WELL LINE

Cause detail: INTERNAL CORROSION

Cause detail: AT APPROXIMATELY 12:04 AM, ON JUNE 22, 2013, THE NATIONAL FUEL GAS CONTROL OPERATIONS CENTER RESPONDED TO AN ALARM ON THE SCADA SYSTEM FOR COMPRESSOR SHUT DOWN AT THE LIMESTONE STORAGE FIELD STATION. GAS CONTROL OPERATIONS STAFF DETERMINED FROM SCADA THAT THE STORAGE FIELD WAS POTENTIALLY EXPERIENCING AN ABNORMAL DECLINE IN PRESSURE AND CONTACTED FIELD OPERATIONS TO INVESTIGATE. A RUPTURE WAS DISCOVERED AT WELL LINE FW 7013 WHICH WAS ISOLATED AND MADE SAFE AT 6:04 AM. FURTHER INVESTIGATION REVEALED THAT NO PERSONAL INJURIES OR PROPERTY DAMAGE BEYOND THE PIPELINE RESULTED FROM THE INCIDENT. A ROOT CAUSE ANALYSIS HAS BEEN COMPLETED BY AN EXPERT LAB IDENTIFYING INTERNAL CORROSION AS THE APPARANT CAUSE. THE COMPANY IS EVALUATING THE REPORT TO DETERMINE A LONG TERM ACTION PLAN. WELL LINE FW 7013 REMAINS OUT OF SERVICE AT THIS TIME.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: CORROSION — INTERNAL.

PHMSA indexed costs: $48,000 reported total cost, $32,132.052 in 1984 dollars, $54,143.473 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.