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Associated Press
Doon, Iowa

Railway estimates 230,000 gallons of oil spilled into floodwaters after Iowa derailment

Iowa oil spill
Rail cars carrying crude oil are shown derailed about a mile south of Doon, Iowa, on Friday, June 22, 2018. More than 30 cars derailed after the tracks reportedly collapsed due to saturation from flood waters from the adjacent Little Rock River.
Tim Hynds | Sioux City Journal via AP

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An estimated 230,000 gallons of crude oil spilled into floodwaters in the northwestern corner of Iowa following a train derailment, a railroad official said Saturday.

BNSF spokesman Andy Williams said 14 of 32 oil tanker cars that derailed Friday just south of Doon in Lyon County leaked oil into surrounding floodwaters from the swollen Little Rock River. Williams had earlier said 33 oil cars had derailed.

Nearly half the spill — an estimated 100,000 gallons — had been contained with booms near the derailment site and an additional boom placed about 5 miles downstream, Williams said. Skimmers and vacuum trucks were being used to remove the oil. Crews will then use equipment to separate the oil from the water.

"In addition to focusing on the environmental recovery, ongoing monitoring is occurring for any potential conditions that could impact workers and the community and so far have found no levels of concern," Williams said.

Iowa oil spill
In this aerial image taken from video, tanker cars carrying crude oil are shown derailed about a mile south of Doon, Iowa, on Friday, June 22, 2018.
Sioux County (Iowa) Sheriff's Office via AP

Officials still hadn't determined the cause of Friday morning's derailment about 15 miles south of the Minnesota border, but a disaster proclamation issued by Gov. Kim Reynolds for Lyon and three other counties placed the blame on rain-fueled flooding. Reynolds visited the derailment site Saturday afternoon as part of a tour of areas hit by recent flooding.

Some officials have speculated that floodwaters eroded soil beneath the train track. The nearby Little Rock River rose rapidly after heavy rain Wednesday and Thursday.

A major part of the cleanup work includes building a temporary road parallel to the tracks to allow in cranes that can remove the derailed and partially-submerged oil cars. Williams said officials hoped to reach the cars Saturday.

The train was carrying tar sands oil from Alberta to Stroud, Okla., for ConocoPhillips. ConocoPhillips spokesman Daren Beaudo said each tanker can hold more than 25,000 gallons of oil.

Beaudo said Saturday that the derailed oil cars were a model known as DOT117Rs, indicating they were newer or had been retrofitted to be safer and help prevent leaks in the event of an accident.

The derailment also caused concern downstream, including as far south as Omaha, Neb., about 150 miles from the derailment site. The spill reached the Rock River, which joins the Big Sioux River before merging into the Missouri River at Sioux City.

Omaha's public water utility — Metropolitan Utilities District — said it was monitoring pumps it uses to pull drinking water from the Missouri River.

Rock Valley, Iowa, just southwest of the derailment, shut off its water wells within hours of the accident. It plans to drain and clean its wells and use a rural water system until testing shows its water is safe.