NTSB: Broken Wheel Caused 2015 North Dakota Oil Train Wreck
Federal investigators believe a broken wheel caused a May 2015 oil train derailment that prompted the evacuation of Heimdal, North Dakota.
The National Transportation Safety Board says in a recently released report that investigators found a mark on the track indicating a broken wheel that caused six cars on the BNSF Railway train to leave the tracks. They also found pieces of a broken wheel at the scene, and say workers had fixed another defective wheel on the train two days before the derailment.
Five derailed cars breached and spilled nearly 100,000 gallons of crude oil from the Bakken region of North Dakota, fueling a massive fire about 1 mile east of Heimdal. No one was hurt, but about 30 people had to evacuate.
The train had three locomotives and 109 cars, 107 of them loaded with crude. The broken wheel was on the 81st car. BNSF estimated damage at $5 million.
The NTSB said in its report that classification of Bakken crude oil emerged as a safety concern after the July 6, 2013, Lac-Megantic (Quebec, Canada) crude oil rail accident in which 47 people were killed.
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