Part of a tree has fallen on a forestry worker in bush near Hannam Vale.
The 35-year-old man was airlifted to John Hunter Hospital in Newcastle soon after midday today. (Thursday June 5).
It is believed the man was conducting logging operations at the time of the accident west of Johns River in Waitui bushland.
Westpac Rescue Helicopter Service spokesman Glen Ramplin said paramedics arrived to find the man with a broken arm, broken ribs and suspected internal injuries.
It is believed the right side of his body was crushed under a fallen chunk of a fielded tree, which hit another as it came crashing down.
"In one sense he is probably very lucky."
Mr Ramplin said the man was conscious and in a stable condition.