COLUMBIA GAS TRANSMISSION, LLC
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | COLUMBIA GAS TRANSMISSION, LLC |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 38.49533, -81.31249 |
Cause
| Cause | EQUIPMENT 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
ON FEBRUARY 17TH, 2024, TC ENERGY WAS NOTIFIED BY A LANDOWNER OF A POTENTIAL GAS RELEASE AT THE CLENDENIN COMPRESSOR STATION. TC ENERGY OPERATIONS PERSONNEL ARRIVED AT CLENDENIN COMPRESSOR STATION, LOCATED IN KANAWHA WEST VIRGINIA, AND DISCOVERED NATURAL GAS BEING RELEASED TO ATMOSPHERE. THE UNINTENTIONAL GAS RELEASE WAS CONFIRMED BY THE ONSITE TC ENERGY OPERATIONS. A ESD ACTUATOR FAILED DUE TO FREEZING CONDITIONS, A VALVE ACTUATOR ON THE ESD SYSTEM FAILED AND TRAVELED OPEN. THE PILOT AIR VENT FROZE DUE TO CONDENSATION SENDING A FALSE SIGNAL TO THE TRIGGER, CAUSING THE VALVE TO TRAVEL TO THE OPEN POSITION. THE SWITCH MALFUNCTION CAUSED NO ALARM TO BE CONVEYED TO THE EMERGENCY SHUTDOWN DEVICE (ESD) PROGRAMMABLE LOGIC CONTROLLER (PLC) AND THEREFORE, IS THE REASON THE GAS CONTROLLER DID NOT RECEIVE A ""CALL OUT"" ALARM FROM THE SCADA SYSTEM. TC ENERGY CONFIRMED THAT THE CLENDENIN STATION CONTINUED TO OPERATE UNDER NORMAL CONDITIONS. TC ENERGY OPERATIONS INVESTIGATED THE OCCURRENCE, CONFIRMED THE CAUSE, CLEARED ALL OBSTRUCTIONS AND ESD ACTUATOR WAS PLACED BACK INTO SERVICE. THE FIRST NRC NUMBER IS 1391816, & THE 48 NUMBER IS 1391930
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.