"COLUMBIA GAS TRANSMISSION, LLC"
gas_transmission Incident — — November 19, 2021
Incident Information
| Incident Date | November 19, 2021 |
| Operator | "COLUMBIA GAS TRANSMISSION, LLC" |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 38.40191, -81.41727 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $125 |
| Emergency Response | $350 |
| Other Costs | $0 |
Location Map
Incident Narrative
"COCO COMPRESSOR STATION'S EMERGENCY SHUTDOWN SYSTEM (ESD) BLOWDOWN VALVE (6""- BDV#:197) UNINTENTIONALLY OPENED AT 1:02AM ON NOVEMBER 19, 2021 AND RELEASED 4370 MCF OF NATURAL GAS THROUGH THE ESD BLOW-DOWN STACK FOR APPROXIMATELY18 MINUTES BEFORE THE VALVE WAS MANUALLY CLOSED. THE OPERATING PRESSURE AT THE TIME OF THE RELEASE WAS 916 PSIG. THE STATION OPERATOR WAS ON-SITE DURING THE EVENT AND WAS ABLE TO ISOLATE THE STATION PIPING AND STOP THE RELEASE. AS PART OF THE PRELIMINARY INVESTIGATION, ICE/MOISTURE WAS FOUND IN THE PILOT CONTROL VALVE OF THE BLOW-DOWN ACTUATOR VALVE, POTENTIALLY CAUSED THE EVENT. THE ISOLATED ESD FACILITIES WERE RETURNED BACK TO SERVICE AT 4:01 AM EST AFTER THE PILOT CONTROL VALVE ASSOCIATED SENSING LINES WERE CLEARED OF MOISTURE/ICE AND INSPECTED."
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.