TOPEKA, Kansas — The Keystone oil pipeline was operating at the bounds of its permit when it burst and released almost 13,000 barrels of oil in northern Kansas, an executive from the company said Tuesday.
Gary Salsman, vice president of field operations for TC Energy, which owns the Keystone pipeline, testified before a joint meeting of two Kansas House committees. He fielded pointed questions from lawmakers about the cause of the spill, cleanup and their concerns about TC Energy’s transparency.
Salsman assured the committee that no spills are acceptable to the company and its response team will remain at the site of the spill, which turned Mill Creek black.
“These response efforts will continue until we have fully remediated the site,” Salsman said.
But on questions of how long cleanup will take, why spills on the Keystone pipeline are becoming more frequent and how much longer a months-long no-fly zone for drones will prevent media and other interested parties in viewing the site, Salsman had little to share.
TC Energy, based in Canada, is still reviewing the root cause of the spill, which involved a welding flaw that burst under stress of bending pipe.
“We understand what happened,” Salsman said. “At this point, we don’t understand why.”
Salsman said TC Energy expects to find out more about that in the next few weeks.
The Keystone pipeline runs 2,687 miles and carries crude oil from Canada to the U.S. It splits just north of the Kansas-Nebraska border with one route cutting across northeast Kansas before running through Missouri and into Illinois. The one that burst runs south through the middle of Kansas and ends in Texas.
The spill was first estimated to be 14,000 barrels, or 588,000 gallons, but the company revised that estimate to 12,937 barrels. It is the largest spill in the decade-plus that the pipeline has been in operation.
Salsman said the company has recovered more than 95% of the oil that was released.
TC Energy has paid just more than $300,000 in fines for more than 20 previous spills. That’s 0.2% of the more than $111 million in property damage resulting from those spills.
What caused the spill?
TC Energy announced last month that it had completed a metallurgical analysis showing the pipeline burst was caused by a flaw in welding that, under the strain of bending stress on the pipe, burst.
But it’s still in the midst of an analysis into why those conditions were present.
Salsman said the section of pipe that burst was installed in 2011 and original to the pipeline.
Rep. Laura Williams, R-Lenexa, said TC Energy’s website talks about its investments in pipeline safety, including risk assessments and threat identification and evaluation. She asked whether there were any warning signs that the segment of pipeline that burst posed such a threat.
“To my knowledge, we did not have any indication that issue existed in that particular location,” he said.
Pipelines in the U.S. are limited under federal regulations in terms of the pressure they can exert to move oil through pipelines. That regulation limits pipelines to operate at 72% of the maximum pressure the metal can withstand.
But, under a special permit, Keystone is allowed to operate at 80% of maximum pressure, according to the 2021 GAO report.
When the pipe burst, it was pushing the limits of that waiver, operating at 1,153 pounds per square inch, Salsman said. That equates to 80.07% of the maximum 1,440 psi. Salsman didn’t acknowledge that, but said the pipeline was operating “well below” the maximum pressure.
Salsman said the pipeline is currently operating at 923 psi.
TC Energy has been performing round-the-clock air monitoring at the site, Salsman said.
In his opening remarks, Salsman said TC Energy recognizes that it must operate with responsibility to the environment.
“While we strive for zero safety or operational incidents,” Salsman said, “our Keystone system did not achieve this goal.”
This story was originally published by the Kansas Reflector, a States Newsroom affiliate.