MIDWESTERN GAS TRANSMISSION CO
gas_transmission Incident — — May 7, 2020
Incident Information
| Incident Date | May 7, 2020 |
| Operator | MIDWESTERN GAS TRANSMISSION CO |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 41.06548, -88.08821 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $0 |
| Emergency Response | $250 |
| Other Costs | $0 |
Location Map
Incident Narrative
AT APPROXIMATELY 18:06 ON MAY 7, 2020 MIDWESTERN GAS TRANSMISSION GAS CONTROLLERS RECEIVED AN ALARM FOR ""UNIT CONTROL PANEL TO SYSTEM CONTROL PANEL COMMUNICATION FAILURE K100"" AT THE HERSCHER COMPRESSOR STATION. FIELD OPERATIONS PERSONNEL WERE DISPATCHED TO THE LOCATION. UPON ARRIVAL AT THE STATION, OPERATIONS EMPLOYEE IDENTIFIED NATURAL GAS VENTING FROM THE UNIT BLOW DOWN VALVE AS THE UNIT SUCTION AND DISCHARGE VALVES HAD NOT CLOSED. EMPLOYEE ACTIVATED THE STATION EMERGENCY SHUTDOWN WHICH CLOSED THE SUCTION AND DISCHARGE VALVE, STOPPING THE RELEASE. MIDWESTERN GAS TRANSMISSION'S INVESTIGATION FOUND A TRIPPED CIRCUIT BREAKER IN THE STATION CONTROL LOGIC SYSTEM WHICH ALLOWED THE UNIT TO SHUTDOWN WITHOUT CLOSURE OF THE UNIT SUCTION AND DISCHARGE VALVE. 5/28/20 CHANGED REPORT TO FINAL - NEAL JONES
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.