The operator of the Keystone Pipeline System, which carries a form of crude oil from Canada to multiple states for refining, said over the weekend that its largest-yet breach has been contained for now.
TC Energy, the Canadian parent of day-to-day pipeline operator TC Oil, said in a statement Saturday that the spill was no longer moving downstream.
It mobilized 250 crews to handle cleanup and has deployed booms and vacuum trucks to stop the oil, the company said.
The failure along a 96-mile segment in parts of Washington County, Kansas, Clay County, Kansas and Jefferson County, Nebraska, brings renewed concern over pipeline safety following the demise of the contentious Keystone XL pipeline project.
Mayberry wants TC Oil to determine the root cause of the breach and name decision-makers who might have contributed to the spill, according to the letter dated Thursday.