Filming for Peter Jackson's latest movie The Hobbit took to the Aratiatia rapids near Taupo this week for a scene using spill gates from a dam.
Publicist Melissa Booth said the film crew dropped 20 to 25 barrels down the rapids for the scene.
"We shot the scene every time there was a dam release, which was at 10am, noon, 2pm and 4pm.''
No actors or stunt crew were forced into the barrels to venture into the extreme conditions, she said.
"I think we would have had some issues with (Occupational Safety and Health) if that were the case.''