Councillors received a report warning of rockfall and landslide risks before six died.
A report commissioned just seven months before a fatal Mount Maunganui campground landslide says there was a high risk to life - but councillors never read it.
A review found more than 20 years of known landslide risk at the campground.
Six people died when the slip hit the campground on January 22.
Encouraged by a staff member to stay, the family rented a caravan to ride out the storm.
WorkSafe could prosecute over the Mount Maunganui landslide that killed six people.