NORTHERN NATURAL GAS CO
gas_transmission Incident —
Incident Information
| Report Date | — |
| Operator | NORTHERN NATURAL GAS CO |
| Commodity | — |
| Pipeline Type | gas_transmission |
Location
| State | |
| Coordinates | 38.07090, -98.92010 |
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 DECEMBER 9, 2023, AT 15:37 HOURS, A NORTHERN NATURAL GAS CONTROLLER, REPORTED AN ABNORMAL OPERATING CONDITION AT THE MACKSVILLE, KANSAS, COMPRESSOR STATION (M670D/E). HE NOTICED FALLING PRESSURE ON THE MULLINVILLE TO MACKSVILLE D AND E LINES WHICH WERE RUNNING COMMON. THERE WAS NO INDICATION OF WHERE THE LEAK MIGHT BE AND NO NOTICES FROM THE PUBLIC OR EMERGENCY RESPONDERS. GAS CONTROL WAS USING THE MACKSVILLE TURBINE 5 TO DIRECTLY INJECT ABOUT 450 MILLION INTO THE CUNNINGHAM, KANSAS UNDERGROUND STORAGE FIELD, WHEN THEY EXPERIENCED A SUDDEN AND UNEXPECTED LOSS OF PRESSURE. PIPELINE TECHNICIANS WERE DISPATCHED ALONG THE PIPELINE IN AN ATTEMPT TO LOCATE THE LEAK. SEVERAL LOCATIONS WERE SHUT-IN OR BYPASSED TO STEM THE FLOW OF GAS. AT 16:37 HOURS, THE MACKSVILLE ON-CALL PERSON ARRIVED ON SITE AND DISCOVERED A RELIEF VALVE VENTING IN THE MACKSVILLE COMPRESSOR STATION YARD (991001). THE 3/8"" RELIEF VALVE PILOT TUBING LINE WAS BROKEN CAUSING THE ANDERSON GREENWOOD 8X10X10 RELIEF VALVE TO FAIL OPEN. THE VALVE WAS SHUT-IN WHICH STOPPED THE LEAK, REPAIRS WERE MADE AND THE SYSTEM WAS RETURNED TO NORMAL SERVICE.
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.