04/26/2016 08:08 EDT | Updated 04/27/2016 10:17 EDT

Mayerthorpe Trestle Bridge Destroyed By Massive Fire

Thick, black smoke billowed from the burning railway bridge for hours.

MAYERTHORPE, Alta. — Residents of a trailer park have been given the all-clear to return home after a fire engulfed a wooden trestle bridge northwest of Edmonton.

The fire started Tuesday afternoon at the Canadian National Railway bridge on the outskirts of Mayerthorpe, forcing students at the nearby Mayerthorpe high school and residents of 38 mobile homes at the Kreek's Krossing trailer park to leave.

Thick, black smoke billowed from the burning railway bridge for hours until it collapsed later Tuesday.

Ashley Olsen, spokeswoman for the town of Mayerthorpe, said the fire has been contained and residents were being allowed back.

The bridge collapsed Tuesday after burning for hours. (Photo: Town of Mayerthorpe)

Kevin Andrea, superintendent of Northern Gateway Public Schools, said students were sent home early over concerns the smoke from creosote in the wood could cause health problems.

Water bombers, along with fire crews from Mayerthorpe and surrounding areas, battled the blaze. Olsen said it's not known how the fire started.

A CN spokeswoman said there were no injuries and train traffic was not affected.

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