Federal regulators say the company running the Keystone Pipeline is staring down nearly $27 million in penalties and tens of millions more in safety upgrades after a December 2022 rupture that dumped heavy crude into a northeast Kansas creek. A proposed settlement filed in federal court this week would funnel money into environmental restoration in Kansas and require a slate of operational changes aimed at keeping the line from failing again. For nearby landowners and downstream communities, it drags back into view one of the largest inland oil-spill responses the country has seen in recent years.
On July 10 the Justice Department, acting on behalf of the Environmental Protection Agency and the State of Kansas, filed a civil complaint and lodged a proposed consent decree against South Bow (USA) LP and South Bow Infrastructure Operations Inc., the entities that now own and operate the Keystone system, according to the Justice Department. Under the proposal, South Bow would pay a civil penalty of $26,867,789, complete an estimated $40 million in work to strengthen spill prevention and leak detection, and contribute more than $3 million to natural-resource restoration projects in Kansas. A federal judge would still have to sign off on the deal after a public comment period.
The rupture on Dec. 7, 2022 released roughly 12,973 barrels of crude into Mill Creek at Milepost 14 and sent oil across several acres of pasture and riparian land, federal investigators later documented. PHMSA laid out precise site coordinates, a blow-by-blow cleanup timeline and response costs that climbed into the hundreds of millions of dollars. The agency labeled the incident the largest onshore crude spill in the United States in nearly a decade and detailed the massive emergency operation that followed.
Government filings and subsequent reporting say oil coated Mill Creek bank to bank for about 3.5 miles and that more than 2,700 animals were harmed or killed. Officials also say no pipeline workers were injured and public drinking water systems were not contaminated. As reported by The Associated Press, South Bow has said it “proactively” launched a response, later carrying out extensive remediation and inspections. Those on-the-ground impacts, along with the company’s cleanup work, are central to the government’s math on penalties and required fixes.
What Investigators Found Under The Prairie
Federal investigators concluded the break was a circumferential girth-weld failure in a fabricated fitting assembly and traced it back to long-standing design and inspection weaknesses around that piece of pipe. PHMSA documented a 26.5-inch crack and a compression bulge at the failed weld, while flagging pipe ovality, abrupt wall-thickness transitions and missing post-construction baseline data as factors that made trouble harder to spot. The government’s complaint also alleges that soil beneath the line was not properly compacted during earlier work and that a 2013 re-excavation failed to replace the suspect section of pipe.
Settlement Terms And What South Bow Would Owe
Under the proposed consent decree, South Bow would be on the hook for the $26,867,789 civil penalty, the roughly $40 million in integrity work the company has estimated, and the restoration payments to Kansas outlined in the filing. According to the Justice Department, the injunctive relief package includes revised inspection schedules, engineering assessments, added training and operational limits that are intended to lower the risk of future discharges. Government attorneys have framed the plan as pairing financial consequences with concrete steps meant to prevent a repeat performance.
Case Status And How To Weigh In
The complaint and proposed consent decree were lodged in the U.S. District Court for the District of Kansas on July 10, 2026, as case number 2:2026cv02401. The settlement is subject to a 30-day public comment period before a judge considers approval. Listings on Justia include the notice of lodging and the complaint and will catalog any new motions or orders. If the court signs off after the comment window closes, the penalty and injunctive terms would resolve the federal government’s civil claims under the Clean Water Act.
Why This Spill Still Matters
The Kansas rupture has become a case study in worries about aging pipeline infrastructure, inspection blind spots and how corporate reshuffling affects oversight of critical energy routes. As the Washington Post and others have noted, South Bow was spun out of TC Energy in 2024 and is now pursuing new pipeline projects, a backdrop that regulators and landowners say makes rigorous integrity work non-negotiable. For communities along the Keystone route, the coming weeks will test whether the settlement delivers lasting protection or simply closes the book on an expensive cleanup.
During the 30-day comment period, residents, environmental groups and state officials will have their chance to say whether the proposed decree goes far enough. The judge’s final call will shape not just how this spill is resolved, but also how far federal watchdogs are willing to go in policing long-distance oil pipelines in the years ahead.
