When the Ogden Federal Elevator at 46th Avenue and 15th Street S.E. was built in 1915, it was seen as a marvel of modern engineering.
About 100 people watched from hundreds of metres away as crews detonated dynamite at 8 a.m. MT, demolishing the elevator in seconds.
Mitch Brown got up early and waited in the cold to witness the end of an era.
"That was pretty cool. It was a little underwhelming compared to the General Hospital explosion, but it was pretty cool," he said.
Cargill plans to sell the property once the site has been cleaned up.