Just about 16,800 gallons of oil leaked into a field in South Dakota as part of a spill that shut the Keystone pipeline down while officials investigate, said officials at TransCanada.
The company reported the 400-barrel estimate Thursday to the National Response Center and the Pipeline and Hazardous Materials Administration. It said the estimate is the result of the excavation of soil to expose more than 100 feet of pipe and takes into account factors including oil observed in the soil and the potential area affected.
TransCanada hasn’t said what caused the leak, reported Saturday. The company said the pipeline will remain closed until this week.
About 100 workers are at the site, which is approximately 4 miles from the Freeman, SD, pump station in Hutchinson County, said TransCanada spokesman Mark Cooper. He said specialists at the site said the leak is under control and there is no significant environmental impact and no threat to public safety.
The pipeline runs from Alberta, Canada, to refineries in Illinois and Cushing, Oklahoma, passing through the eastern Dakotas, Nebraska, Kansas and Missouri. The Keystone pipeline can handle 550,000 barrels, or about 23 million gallons, daily.
The shutdown will have a short-term impact in which less-heavy Canadian crude will be getting to the market, but the system already is in an oversupply mode so consumers are unlikely to see an impact at the pump.