TC Energy says combination of factors caused Keystone pipeline leak

TC Energy Corp. says cleanup and remediation of the Keystone pipeline leak in December will value an estimated US$480 million.

The Keystone pipeline system suffered the worst oil spill in its historical past on Dec. 7, when oil leaked right into a creek in Washington County, Kansas.

The Calgary-based pipeline operator says the leak was attributable to a mix of things, together with bending stress on the pipe and a welding flaw.

It says the weld flaw led to a crack that grew over time because of bending stress fatigue, resulting in the leak. The explanation for the bending stress stays below investigation.

The firm says a metallurgical evaluation recognized no points with the energy or materials properties of the pipe or manufactured becoming.

TC Energy additionally revised the dimensions of the leak to 12,937 barrels from the unique estimated most of 14,000 barrels.

This report by The Canadian Press was first printed Feb. 9, 2023.