TOPEKA, Kan. (AP) — Federal data shows that a spill dumping almost enough oil to fill an Olympic-sized swimming pool into a northeastern Kansas creek this week is the largest for an onshore crude pipeline in nine years. It also shows that its operator was allowed to exceed typical maximum pressure levels. The Keystone pipeline spill was in a creek running through rural pastureland in Washington County, Kansas, about 150 miles (240 kilometers) northwest of Kansas City. U.S. Department of Transportation data shows that it was the biggest in the system’s history. Canada-based operator TC Energy said the spill was about 14,000 barrels, or 588,000 gallons. Both it and the U.S. Environmental Protection Agency said Friday the spill was contained, though cleanup efforts will continue into next week.