DOON, Iowa (AP) — An estimated 230,000 gallons (870,619 liters) 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 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 (378,530 liters) — had been contained with booms near the derailment site and an additional boom placed approximately 5 miles (8.05 kilometers) 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.

Officials still hadn’t determined the cause of Friday morning’s derailment, 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, Canada, to Stroud, Oklahoma, for ConocoPhillips. ConocoPhillips spokesman Daren Beaudo said each tanker can hold more than 25,000 gallons (20,817 imperial 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, Nebraska, about 150 miles (240 kilometers) 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.

OMAHA, Neb. (AP) — The U.S. Army Corps of Engineers says sandbars along part of the Missouri River are again closed to protect the nests of endangered bird species.

The Corps says endangered interior least terns and threatened piping plovers nest on sandbars between Ft. Peck Dam in Montana and Ponca State Park in Nebraska.

The birds use the sandbars to lay their eggs and hatch chicks.

The number of sandbars on the Missouri River is limited this year because the water level is higher than normal.

The nesting season runs from mid-May through August.

LA VISTA, Neb. (AP) — A new music venue with an indoor space and an outdoor amphitheater will be built in eastern Nebraska.

The La Vista City Council unanimously approved a preliminary statement of intent to build the venue, the Omaha World-Herald reported

The venue will be built by local promoter 1% Productions, Kansas-based Mammoth Live and Omaha developer City Ventures. Mammoth Live and 1% Productions will operate the venue.

“There are more shows out there,” said Marc Leibowitz of 1% Productions. “There’s more business to be had, and we need a place to do it that works.”

Brenda Gunn, city administrator for La Vista, said the cost hasn’t been determined for the project but that about $3.2 million could be needed.

Leibowitz said the goal isn’t to take down other venues.

“It’s about the venue we want to build. It’s about bringing something new,” Leibowitz said. “We really just want it to be a top-notch experience.”

The venue is expected to hold 1,800 people indoors and 4,000 people outdoors. Both areas will have the capacity to scale up, depending on the configuration of seating and other elements.

Mammoth Live and 1% Productions said artists have skipped the market because they don’t have the right place to play.

“We’re missing tours. When we don’t miss them, we’re putting them in oddball situations where the production doesn’t work, or it’s an odd fit, or the artist can’t make money, or we can’t break even,” said Josh Hunt of Mammoth.

Construction is expected to begin this year, with a goal of opening by 2020.

“It’s gonna be really exciting for the market,” Leibowitz said,

HARRISON, Neb. (AP) — A woman has been given one to three years in prison for her role in a pasture rental scam in the northern Nebraska Panhandle.

Sioux County District Court records say 52-year-old Kelley Heller, of Crawford, was sentenced June 12.

Heller and her daughter, Calinda Barthel Vantine, were arrested in February 2017. Prosecutors say the scheme was orchestrated by Vantine and resulted in more than $44,000 in losses to the five victims. The two didn’t own the pasture they’d rented to the five people from Nov. 1, 2015 through Feb. 15, 2017.

The 28-year-old Vantine was sentenced to prison last October. She also is known as Calinda Barthel.