VIKING GAS TRANSMISSION CO
gas_transmission Incident — — March 3, 2017
Incident Information
| Incident Date | March 3, 2017 |
| Operator | VIKING GAS TRANSMISSION CO |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 45.31365, -92.58768 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $0 |
| Emergency Response | $1,000 |
| Other Costs | $0 |
Location Map
Incident Narrative
THE INITIAL TRIGGER FOR THE EVENT WAS A BLOWN CIRCUIT PROTECTION FUSE. THE LOSS OF POWER ON THE CIRCUIT RESULTED IN AN UNINTENDED EMERGENCY SHUTDOWN OF THE OSCEOLA COMPRESSOR STATION. THE ESD ACTIVATED AND OPERATED AS DESIGNED. OPERATIONS PERSONNEL WERE NOTIFIED IMMEDIATELY AND ARRIVED ON SITE TO FIND GAS BLOWING FROM THE STATION DISCHARGE BLOW OFF. OPERATIONS ASSESSED THE SITUATION ON THE GROUND TO DETERMINE SAFETY OF THE ENVIRONMENT AND DETERMINE CAUSE OF THE ESD. ATTEMPTS WERE MADE TO CLOSE THE DISCHARGE BLOCK VALVE BUT THE ACTUATOR DID NOT FUNCTION. OPERATORS ISOLATED THE ESD SYSTEM TO ALLOW USE OF REVERSING GAS AND CLOSED THE DISCHARGE AND SUCTION BLOW OFF VALVES. THE DISCHARGE BLOCK VALVE ACTUATOR WAS FOUND TO CONTAIN ICE WHICH IMPEDED FUNCTION. THE ACTUATOR WAS THAWED, WATER DRAINED, TESTED AND RETURNED TO SERVICE. THIS REPORT WAS SUBMITTED IN MAY OF 2017 BUT WAS NOT ACCEPTED BY THE SYSTEM FOR UNKNOWN REASON.
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.