A 33 year old worker was recently airlifted to hospital after an accident at the Boondooma Dam spillway repairs construction site.
The man was pushed by a 7 tonne air compressor onto a steel reinforcement structure.
The structure rolled over the man and caused injuries to his lower limbs.
The worker was treated by a LifeFlight critical care doctor and then Queensland Ambulance service.
He was flown to Sunshine Coast University Hospital in a stable condition.
A second man, who probably witnessed the accident was taken to hospital for treatment of shock.
Workplace Health and Safety Queensland are conducting inquiries into the incident.