UPDATE: This story has been updated and corrected based on new information from Union Pacific. It will continue to be updated if more information becomes available.
CHEYENNE – One man is dead and another is missing after two eastbound trains collided Thursday night about 18 miles west of Cheyenne.
Raquel Espinoza, the senior director of corporate communications for Union Pacific, said Friday a train carrying mixed freight traveling eastbound from Pocatello, Idaho, toward North Platte, Nebraska, collided with the rear portion of another train that was stopped on the track.
One man died and one crew member still had not been located as of 9:30 a.m. Friday. Fifty-six cars derailed as part of the crash, Espinoza said.
The crew of the stopped train, which was traveling from Green River to Cheyenne, had evacuated prior to the collision, Espinoza said.
The cause and names of the people involved were not released as of Friday afternoon.
Exit 345 (Warren Road) on Interstate 80 was closed, as well as the truck parking area at that interchange. The Interstate 80 Service Road eastbound at Exit 342 (Harriman Road) was also closed, though traffic accessing the quarries in that area was allowed, according to a Wyoming Department of Transportation news release.
That area will continue to be closed as investigators from the National Transportation Safety Board conduct an investigation, Espinoza said.
Immediately following the crash, first-responders assessed all of the train cars and found no immediate hazards or threats to the public, according to a Cheyenne Fire and Rescue news release sent just after midnight Friday morning.
Cheyenne Mayor Marian Orr said she had been in communication with first-responders, as well as Union Pacific officials.
“This was a significant and tragic event. We are a community of railroaders, and tonight our community has experienced loss. And if you pray, please pray,” Orr said.
Responding agencies included Cheyenne Fire and Rescue; F.E. Warren Air Force Base; Laramie County Sheriff’s Department; American Medical Response (AMR) ambulance; Laramie County Fire Districts 1, 2 and 10; Cheyenne-Laramie County Health Department and Wyoming Highway Patrol.