One man has been killed and another flown to hospital after an accident at a Transpower site near Makara.
Rescue staff says it appears a cherry picker, 10 metres in height, toppled down a hill with the two men in its basket.
The Transpower contractors were carrying out high voltage line work.
The injured man was flown by Westpac rescue helicopter from Oteranga Bay – near the Meridian wind farm – to Wellington Hospital.
He is in critical condition with serious leg and chest injuries.
Westpac Rescue spokesman Dave Greenberg told 3 News paramedics performed CPR on the second man, but he was pronounced dead at the scene.
A no fly zone has been put in place over the area.
Department of Labour and Transpower officials have begun investigations.