NORTHERN BORDER PIPELINE COMPANY
gas_transmission Incident — — July 3, 2025
Incident Information
| Incident Date | July 3, 2025 |
| Operator | NORTHERN BORDER PIPELINE COMPANY |
| Commodity | NATURAL GAS |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 48.99920, -107.54290 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | MALFUNCTION OF CONTROL/RELIEF EQUIPMENT |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $0 |
| Emergency Response | $0 |
| Other Costs | $0 |
Location Map
Incident Narrative
"ON JULY 3, 2025, AT 16:24 MDT, NORTHERN BORDER'S GAS CONTROL (GC) RECEIVED AN ALARM AT MONCHY METER STATION AND AT 16:36 MDT, GC RECEIVED A CALL FROM A CUSTOMER ABOUT A PRESSURE DROP ON THEIR COMPRESSOR STATION THAT MAY HAVE IMPACTED MONCHY METER STATION. AT 18:38 MDT, A SECOND CALL WAS RECEIVED FROM THE CUSTOMER ASKING FOR A TECHNICIAN ON OUR SIDE TO INVESTIGATE A RELIEF VALVE AT MONCHY METER STATION. GC DISPATCHED A TECHNICIAN TO INVESTIGATE A POTENTIAL RELEASE AT 18:45 MDT. UPON ARRIVING ON SITE AT 21:17 MDT, THE TECHNICIAN DISCOVERED NATURAL GAS WAS BEING RELEASED TO THE ATMOSPHERE THROUGH AN EIGHT-INCH RELIEF VALVE. IMMEDIATE ACTION WAS TAKEN TO ISOLATE THE VALVE, WHICH ENDED THE RELEASE AT 21:20 MDT. THE UNINTENTIONAL GAS LOSS WAS CALCULATED TO BE APPROXIMATELY 217,850.1 MCF. THERE WERE NO DAMAGES, INJURIES OR HOSPITALIZATIONS. THE INVESTIGATION INTO THE CAUSE OF THE VALVE FAILURE IS STILL ON-GOING. THE RELIEF VALVE IS CURRENTLY ISOLATED AND THERE IS A SECONDARY RELIEF VALVE AT THE MONCHY METER STATION THAT IS PROVIDING OVERPRESSURE PROTECTION TO THE PIPELINE SYSTEM."
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.