South Bow Corp. has shut down the Keystone Pipeline and was actively responding April 9 to an oil release of 3,500 bbl at Milepost 171 (MP-171) of Keystone, near Fort Ransom, North Dakota.

The company said in a 12:30 p.m. CST April 9 update that the workforce at the site will increase to “over 100 resources” for repair and remediation. Multiple onsite vacuum trucks were beginning the recovery process, South Bow said on its website.

“The affected segment of the Keystone Pipeline System remains isolated. Return-to-service plans are being evaluated,” the company said.

South Bow initiated a shutdown and response at approximately 7:42 a.m. CST on April 8, after the company’s control center leak detection systems detected a pressure drop in the system. The system was shut down about two minutes later, the company said.

“Onsite staff, the surrounding community, and mitigating risk to the environment are South Bow's primary concern,” the company said. “Upon activating emergency response procedures, South Bow established around-the-clock air and environment monitoring. The Company's response efforts focus on remediating the site.”

South Bow is a midstream company that spun off from TC Energy in October 2024.

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