Emergency crews were called to northwest Calgary on Thursday after a man became trapped inside an aggregate hopper.
Paramedics responded to Inland Concrete in the 11000 block of 69 Street N.W. at around 11 a.m.
EMS said victim, a man in his late 20s, was buried up to his waist in aggregate material that was being loaded into a hopper, located three stories off the ground in a large building.
Paramedics found him in serious but stable condition.
EMS could not say exactly how the worker became trapped.
There were concerns the cold temperature of the material could result in hypothermia.
It took crews more than two hours to free the victim, who was then taken to Foothills hospital in stable condition.
Occupational Health and Safety officials are investigating the incident.
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