TOPEKA, Kan. (AP) – Federal data shows a spill from the Keystone pipeline this week dumped enough oil to fill an Olympic-sized swimming pool into a northeastern Kansas creek.

The data shows it’s the largest for an onshore crude pipeline in nine years, and the biggest in the system’s history.

The U.S. Department of Transportation data also shows Keystone’s operator was allowed to exceed typical maximum pressure levels. T

he pipeline’s Canada-based operator, TC Energy, and the U.S. Environmental Protection Agency said Friday the spill was contained, although cleanup efforts will continue into next week.