DAPL-ETCO OPERATIONS MANAGEMENT, LLC
hazardous_liquid Incident — — February 28, 2018
Incident Information
| Incident Date | February 28, 2018 |
| Operator | DAPL-ETCO OPERATIONS MANAGEMENT, LLC |
| Commodity | CRUDE OIL |
| Pipeline Type | hazardous_liquid |
Location
| State | |
| Coordinates | 48.08253, -103.83504 |
Cause
| Cause | EQUIPMENT FAILURE |
| Subcause | NON-THREADED CONNECTION FAILURE |
Casualties
| Fatalities | 0 |
| Injuries | 0 |
Costs
| Property Damage | $85 |
| Emergency Response | $240 |
| Other Costs | $0 |
Location Map
Incident Narrative
ON 2/28/201 AT 12:47 PM THE CONTROL CENTER RECEIVED A NOTIFICATION FROM THE PUBLIC CONCERNING AN APPARENT RELEASE AT THE ND-14 VALVE SITE. FOLLOWING RECEIPT OF THE CALL STEPS WERE TAKEN TO IMMEDIATELY SHUTDOWN THE PIPELINE. FIELD PERSONNEL WERE DISPATCHED TO THE SITE AND UPON ARRIVAL AT APPROXIMATELY 13:45 DISCOVERED A LEAKING FLOWSERVE WORCHESTER 1/2"" BALL VALVE ON THE VALVE BODY BLEED PIPING ON THE ND-14 MAINLINE VALVE. THE LEAK HAD SPRAYED INSIDE THE FENCED VALVE SITE AND ALSO OUTSIDE OF THE OPERATOR CONTROLLED FENCED AREA. THE MAINLINE VALVE WAS REMOTELY CLOSED AND ANY RESIDUAL PRESSURE WAS REDUCED THROUGH THE BLEED PIPING. REMEDIAL ACTION WAS TAKEN TO REMOVE ALL CONTAMINATED SOIL AND SNOW INSIDE AND OUTSIDE OF THE VALVE SITE. THE 1/2"" VALVE WAS REMOVED AND REPLACED AND ND-14 WAS PLACED BACK INTO SERVICE AND THE LINE RESTARTED. ALL OTHER 1/2"" FLOWSERVE WORCHESTER BALL VALVES IN THE DAPL GATHERING SYSTEM WERE INSPECTED FOR THE SAME CONDITION OF WHICH NONE WERE DISCOVERED. IT WAS DETERMINED THAT THE VALVE SEAL FAILED DUE TO FREEZE EXPANSION OF RESIDUAL WATER TRAPPED IN THE VALVE BODY.
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.