A security firm was guarding the quarry entrance and police vehicles were seen coming and going from the quarry during the afternoon.
Police said in a media statement that the family had been advised.
"A Serious Crash Unit investigation will be conducted, and WorkSafe [New Zealand] have been advised," the statement said.
A WorkSafe spokesman said WorkSafe had been notified of the incident and was making initial inquiries.
Fire and Emergency communications shift manager Paul Radden said the truck had been carrying aggregate and firefighting rescue equipment was needed.
"Specialist crews went out there with rescue equipment to assist with the incident," Mr Radden said.
Firefighters were helped by the regional incident support vehicle that contained extra rescue equipment appropriate for crashes involving heavy trucks.
Tauranga Quarries Ltd and Ian Wilson, a member of the J Swap Contractors management team, declined to comment. Mr Wilson is also on the executive of the New Zealand Road Transport Association for the Waikato and Bay of Plenty.
Two years ago a 24-year-old man died after he became trapped under a 45-tonne rock cutter at Oropi Quarries in McPhail Rd.