QUEENSLAND Premier Campbell Newman has hit back at claims dumping dredge spoil on the Great Barrier Reef will ruin the world-heritage listed marine park.

The Great Barrier Reef Marine Park Authority approved a proposal, along with 47 strict conditions, to dump dredge spoil from the Abbot Point coal terminal expansion in the marine park area.

Three million cubic metres of spoil must be dredged as part of the expansion after the Federal Environment Minister Greg Hunt gave the controversial project the green-light late last year.

Environmentalists have argued the project will damage marine life and turn the reef into a shipping super-highway.

Mr Newman said on Tuesday during a visit to Curtis Island there was a very dishonest campaign being run by certain groups.

"There is no spoil being dropped on coral reefs," he said

"It is not true, it is bunkum.

"The nearest reefs are 40 kilometres away."

Mr Newman said the Galilee Basin coal projects will see billions of dollars worth of investment flood into Queensland on the same scale as the widespread LNG projects across the state.

"They will see 11,000 to 12,000 people employed during construction then around 4000 to 6000 when those mines are at a steady state," he said.

"We need to get on with those projects and this government is committed to do that."