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Keystone Pipeline Spill in North Dakota Linked to Fatigue Crack
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A fatigue crack in the Keystone Pipeline caused an oil spill in North Dakota this past April, releasing an estimated 3,500 barrels of oil onto farmland, according to the pipeline operator, South Bow. The incident underscores ongoing concerns about the integrity of critical energy infrastructure and raises questions about long-term environmental impacts.
The findings, released in a quarterly report on Thursday, indicate the failure “resulted from a fatigue crack that originated along the pipe’s manufactured long-seam weld.” A fatigue crack develops over time due to repeated stress. Despite the failure, a mechanical and metallurgical analysis persistent that the pipe and welds initially met industry standards, according to the company.
Spill Costs and Insurance Claims
The spill-related costs currently total approximately $55 million, with South Bow anticipating full recovery through insurance claims early next year. As of September, the company had already received around $16 million in reimbursements from its insurance policies.
Regulatory Response and Delayed Analysis
The U.S. Pipeline and Hazardous Materials safety Governance (PHMSA) mandated several corrective actions following the spill. However, the release of a complete, third-party “root cause analysis” was delayed due to the federal government shutdown.
The timing of the analysis remains uncertain. A South Bow spokesperson stated that PHMSA is leading the process and,”out of respect for the process,we can’t speak for them.”
Incident Details and Rapid Shutdown
The spill occurred on April 8th. An employee at the rural site, located roughly 60 miles southwest of Fargo, detected a “mechanical bang” and swiftly shut down the pipeline within two minutes, a state official reported. The spill impacted a field near fort Ransom, a small town known for its forested landscapes, outdoor recreation opportunities, and scenic views.
Approximately 147,000 gallons of oil were released. South Bow mobilized vacuum trucks and over 200 workers to manage the cleanup efforts, and the pipeline was restored to service after a six-day shutdown.
Environmental Recovery and Ongoing Monitoring
State regulators have conducted multiple inspections of the site in the months following the spill. According to an incident report from September,”the vegetation is recovering well,” but further assessment is scheduled for spring 2026. Nearly 90% of the spilled oil has been recovered, with crews removing impacted soil for disposal.
Local landowner Myron Hammer expressed surprise at the speed of the cleanup, stating, “I’m surprised that they got everything put back in place as speedy as they did. It was a big project.” While approximately 5 acres of land were directly affected by the spill,south Bow utilized over 40 acres for staging and access. Hammer noted that personnel and vehicles were still present at the site as recently as Thursday.
Pipeline Integrity and Future Inspections
South Bow has conducted numerous evaluations of the pipeline and, to date, has found “no injurious issues.” The company plans to continue with additional in-line inspections and “integrity digs” to proactively identify and address potential vulnerabilities.
The Keystone Pipeline, spanning nearly 2,700 miles (4,345 kilometers), transports crude oil from Alberta, Canada, to refineries in Illinois, Oklahoma, and Texas. From January through September of this year, the pipeline carried an average of 580,000 barrels of
