The explosion at Pinnacle Renewable Energy in Entwistle is being investigated.
Parkland County firefighters responded to an explosion at a wood-pellet plant that injured three people on Monday.
Sarah Mate of Parkland County says 40 members of its crew arrived at Pinnacle Renewable Energy in Entwistle around 2:00 that afternoon. They had contained the fire by 7 p.m.
A 28-year-old man was airlifted by STARS in critical condition and the other two people were taken to the hospital by ambulance.
OHS is continuing to investigate the cause of the explosion.