"Been [a] fantastic job, fantastic client, all gone extremely smoothly, it's been great," Murray said.
Rainbow Springs project director Stewart Brown said a Haast eagle would fly on a hidden compressed air ram to attack a moa, while the dinosaur will be startled by the boat while drinking from the flume.
"And he gives you a bit of a bellow," Brown said.
"The Haast eagle's dramatic attack on the moa during the ride shows the power and strength of New Zealand's now extinct massive native eagle, which is believed to have attacked its prey at up to 80km/h," he said. "It will be very dramatic."
The project would cost more than $10 million and included an outdoor 384-seat free-flight bird show auditorium, children's playground and cafe.
The cost of the project was being met by Ngai Tahu Holdings, the shareholder of Rainbow Springs owner Ngai Tahu Tourism. It is the largest single investment made in the park since it opened in 1932.