"One ambulance and one manager responded to the scene and treated then transported one patient in a serious condition to Middlemore Hospital."
Four fire trucks responded to this workplace accident.
A spokesperson from Fulton Hogan said the worker was a subcontractor of the company, and was being looked after by their team members at the hospital.
"He is getting all the support he needs. He is not in a serious condition."
Fire and Emergency services said they were called to the site by ambulance staff.
A WorkSafe spokesperson said they had been notified of the accident and were making initial inquiries.
A police spokesperson said the incident was reported to them at 8.27am.
"One person was transported to hospital with minor injuries. WorkSafe has been advised."