The Dreamworld Thunder River Rapids ride. Photo / Supplied
The Dreamworld Thunder River Rapids ride. Photo / Supplied
The panicked voice saying there was a "raft in the conveyor" of the Thunder River Rapids ride was Dreamworld employee Nigel Irwin's first indication something disastrous had happened at the theme park.
Irwin was manning the Gold Coast park's communication hub on October 25, 2016 when he received a call about a medical emergency on the 30-year-old ride, AAP reports.
On Tuesday, he provided an account of his experience to an inquest into the deaths of New Zealand woman Cindy Low, Kate Goodchild, her brother Luke Dorsett and his partner Roozi Araghi at the Southport Coroners Court.
Irwin told the inquest he simply heard a panicked voice say "I've got a raft in the conveyor".
Only when he looked at CCTV footage and saw a raft on its side did Irwin realise something serious had occurred.
When first aid officers told him to call an ambulance and they had at least one person who was unconscious and "turning blue", Irwin was the man to call triple zero.
As he made the call, Irwin upgraded the emergency to a "222 emergency" - the park's most serious emergency code.
"It basically means we have something terrible going on," Irwin said in a statement to police that was shown to the inquest.
Irwin said everyone had acted as swiftly as they could.
"Unfortunately there was just nothing we could do when we got there," he told the inquest.
Four former Dreamworld workers are suing the Gold Coast theme park, two years after they witnessed the entire horror of four people dying on the Thunder River Rapids ride.
Three of the four workers will give evidence at the inquest into the October 2016 incident.
Represented by Shine Lawyers, the four first responders say they are still psychologically damaged from trying to help the four pinned Australians.
Dreamworld's Thunder River Rapid ride experienced a serious accident which led to people being killed when the ride flipped on the conveyor belt Photo / David Clark, News Corp Australia
In a statement to news.com.au, Shine Lawyers' solicitor Tina Ibraheem said the four first responders' "level of trauma is beyond anything I have ever seen".
Shine Lawyers is representing safety officers Shane Green, John Clark and Rebecca Ramsey and engineer Paul Burke who have all left Dreamworld and are all involved in ongoing counselling.
The three safety officers were part of Dreamworld's medical team and were called as soon as the ride flipped, crushing the four victims between the wooden conveyor belt and the raft.
"Nobody should ever have to see what they were confronted with when they entered that trench," Ibraheem said.
"The victims' bodies were so badly disfigured from crush and compression injuries that these first aid officers were completely helpless, there was nothing they could do.
"The nation was overcome with grief and everybody tried to piece together in their minds what happened to those innocent people as they were dragged into that machinery.
"Our clients, however, saw exactly what happened to the four bodies and they have to live with those images for the rest of their lives."
Major event - Dreamworld victims Kate Goodchild Luke Dorsett Roozi Araghi and Cindy Low. Photo / Supplied
Three of the four first responders will take the stand to testify at the inquest into the Dreamworld tragedy — something that's played heavily on their minds Ibraheem said.
"The lead up to this week has been incredibly distressing, it's a date that has played on their minds for nearly two years," she said.
"One of the hardest memories for our clients to forget is the screams of the victims' family members who were right there wanting them to do more to save their loved ones. They so desperately wanted to do more, but the victims were gone."
The second two-week block of the Dreamworld inquest started yesterday.
The details of an earlier collision between empty rafts on a Dreamworld ride on which four people would die in 2016 are set to be revealed at an inquest into the fatal incident.
Stephen Buss was operating the Thunder River Rapids ride in 2014 when two rafts collided in similar fashion to the incident.
Buss was subsequently fired following an internal investigation by the Gold Coast theme park.
Yesterday, the court heard an employee admit Dreamworld had suffered a "total failure" to identify safety issues on the ill-fated Thunder River Rapids ride.
Maintenance planner Grant Naumann conceded issues such as pinch points had been overlooked with the 30-year-old ride before a malfunction in October 2016 led to the deaths of four visitors.
Counsel assisting Ken Fleming QC asked Mr Naumann if there had been a "total failure by everybody" to identify risks with the ride.
"In hindsight, yes," Naumann replied after a long pause.
Senior police officers arrive at the scene of accident at Dreamworld where four people were killed, Gold Coast. Photo / Regi Varghese, News Corp Australia
The fatal incident occurred after a water pump failed, dropping water levels and leaving a raft stranded on a conveyor belt.
Operators failed to shut down the conveyor belt before the raft containing the four victims collided with it, forcing both rafts to flip and the visitors to suffer fatal injuries in the ride's machinery.
Naumann had earlier said he believed some maintenance operations may have been deferred for budgetary reasons.
But he said he had never been told explicitly he could not attend to safety issues due to monetary factors.
The inquest also heard an emergency stop button on the main control panel of the ride was never checked by a maintenance supervisor.
"That button was not a part of our pre-operational checks," maintenance supervisor Stephen Murphy said.
Murphy also revealed senior management had altered a policy to allow a ride to break down three times in 24 hours before it was shut down. "It was passed down from the management meeting that we would do it that way," Murphy said, adding he didn't know when the order to extend it from two break downs in one day had been made, or why.
The scene following the disaster at Dreamworld. Photo / David Clark, News Corp Australia
The inquest also heard from ex-senior ride operator Stephen Buss, who was terminated by Dreamworld after an incident in November 2014 when two rafts containing visitors collided on the ride's conveyor belt.
CCTV footage of the incident was played in the inquest, showing the two rafts colliding and bumping before the conveyor shut down.
No one was harmed in the 2014 incident.
Buss said he'd mistakenly shut down a water pump and the conveyor belt after receiving a "low-air alarm".
"I don't remember a great collision. I believe the rafts touched," Buss told the inquest.
"If they were touching each other that's why I would have stopped the conveyor." Earlier, the inquest heard an external engineer had issued a certificate saying the ride was "mechanically and structurally safe to use" just days before the tragedy occurred.
Third party engineer Thomas Polley issued the certificate after undertaking the inspection alongside Dreamworld junior engineer Gen Cruz in September 2016. Cruz told the inquest he was unaware of any risk assessment or safety audits being undertaken on the ride.
