NORTHERN NATURAL GAS CO
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | NORTHERN NATURAL GAS CO |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 37.37500, -100.22725 |
Cause
| Cause | CORROSION FAILURE |
| Subcause | — |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | — |
| Lost Commodity | — |
| Public/Private Damage | — |
| Emergency Response | — |
| Environmental Remediation | — |
| Other Costs | — |
Location Map
Incident Narrative
A LOW LOW PRESSURE ALARM WAS DETECTED AT 14:39 ON MAY 29, 2015, AT THE FOWLER METERING STATION. FIELD PERSONNEL WERE DISPATCHED TO INVESTIGATE IF THE ALARM WAS ACCURATE OR A DATA ERROR. FIELD PERSONNEL ARRIVED AT APPROXIMATELY 15:00 AND MEASURED THE PRESSURE AT THE INLET VALVE AND CONFIRMED THE LOW PRESSURE THAT SCADA HAD INDICATED. PERSONNEL BEGAN SEARCHING ALONG THE RIGHT-OF-WAY FOR AN INDICATION OF BLOWING GAS. A LEAK WAS DISCOVERED AT 16:45 APPROXIMATELY 830 FEET FROM THE NEAREST ROAD IN A FIELD WITH NO FIRE DETECTED. COORDINATION WITH THE LOCAL UTILITY ALLOWED THE LINE TO REMAIN IN SERVICE UNTIL 22:30 WHEN THE LINE WAS SHUT IN AND THE TOWN WAS SUPPLIED WITH A BOTTLE TRUCK. THE SITE WAS EXCAVATED ON MAY 30, 2015, AND THE DAMAGED PIPE, DUE TO THE LEAK, WAS REPLACED ON THE SAME DAY. THE PIPELINE WAS RETURNED TO SERVICE ON MAY 31, 2015, AND RESTRICTED TO 170 PSIG OR 80% OF THE ACTUAL OPERATING PRESSURE AT THE TIME OF THE INCIDENT. THIS REDUCTION WAS HELD UNTIL THE ENTIRE LINE COULD BE LEAK SURVEYED TO ENSURE NO FURTHER LEAKS WERE PRESENT.
About This Pipeline Incident
Pipeline incident data is reported to the Pipeline and Hazardous Materials Safety Administration (PHMSA). All significant incidents involving fatalities, injuries, or property damage over $50,000 must be reported.