An adventure tourism organisation hopes to launch what it calls New Zealand's first power-fan jump experience, down a 13 metre mine shaft in Greymouth this year.
Wild West Adventure Tours says the experience is similar to a bungy jump, but instead of bouncing back up, a brake brings the fall to a gradual halt.
Director Paul Schramm says the equipment has been rigourously tested and certified and has been used in Britain for several years.
He hopes the experience will be operating by November.
Mr Schramm says the company plans to set up other jumps around the country, with the potential for falls of up to 100 metres.