NORTHERN NATURAL GAS CO
gas_transmission Incident — — September 26, 2021
Incident Information
| Incident Date | September 26, 2021 |
| Operator | NORTHERN NATURAL GAS CO |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 41.42240, -97.28703 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $250 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
"ON SEPTEMBER 26, 2021 AT 13:03 NORTHERN'S GAS CONTROL NOTIFIED THE SOUTH SIOUX CITY ON CALL TECHNICIAN THAT THE PRESSURE WAS DROPPING AT THE COLUMBUS #4 TOWN BORDER STATION. AT 13:20 CHAD HOMOLKA FROM ADM CORN PLANT COLUMBUS #4 TOWN BORDER STATION CALLED TO REPORT AT RELIEF VALVE VENTING GAS. THE RELIEF AT THE NER-0063 - COLUMBUS 8-INCH BRANCH LINE TAKE-OFF WAS PULLING DOWN THE LINE PRESSURE. A MEASUREMENT TECHNICIAN WAS DISPATCHED TO THE NER-0063 BRANCH LINE REGULATOR SETTING. THE RELIEF VALVE WAS DISCOVERED TO BE VENTING AND WAS ISOLATED TO STOP THE VENTING GAS. A FAILED OUTPUT GAUGE WAS DISCOVERED ON THE FISHER 4100 CONTROLLER. UPDATES MADE AT THE REQUEST OF PHMSAS ACCIDENT INVESTIGATION DIVISION: GPS LOCATION CORRECTED; NRC INITIAL CALL TIME CORRECTED; INSTALLATION DATE ESTIMATED, AND NARRATIVE UPDATED;"
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.