The park visitor, a man with 37 years of mining and explosives experience, said he was walking his dog in the morning and spotted the non-electrical explosives detonator tube protruding from a rock in a retaining wall. He contacted police at 9.30am.

Tenterfield police sent images and information of the detonator tube to the Sydney based bomb squad, concerned that tube may have still had an unexploded detonator at the end of it.

Experts in Sydney said that the tube was safe.

"In it's present state, it is deemed to be safe," Constable Shaun Bird said.

"Pictures were sent to the bomb squad in Sydney and through those pictures and information received, the experts declared the area safe. However, the rock will be removed and taken back to the quarry."

The rock was placed in a retaining wall at the Tenterfield Lodge Caravan Park two to three months ago.

"The park is perfectly safe. The rock is only being moved for precautionary concerns," Constable Bird said.

Police checked the area and no other suspicious devices or rocks were found.

Residents and visitors to the park were not evacuated at any point.