The public will have six weeks to comment on a multibillion-dollar central Queensland liquefied natural gas (LNG) plant, which would require more dredging.
The environmental impact statement for Arrow Energy's 300-hectare plant on Curtis Island off Gladstone was released on Thursday.
If approved, it would employ up to 3715 people during construction and 450 people during operation, which would begin as early as 2017.
The Curtis Island plant is expected to have an annual capacity of up to 18 million tonnes of LNG.
A nine kilometre-long feed gas pipeline would be needed from Gladstone, traversing Port Curtis through a tunnel under the seabed.
Dredging of the Port Curtis sea bed and the riverbed at the mouth of the Calliope River would be required to provide access to marine facilities on Curtis Island and the mainland.
Dredging of Gladstone Harbour for LNG-related works is already controversial.
Fisherman are seeking compensation from the government for losses suffered last year, when disease broke out in fish and drove some businesses to the wall.
Arrow chief Andrew Faulkner said it was vital the project be developed with community input.
"We're serious about our responsibilities to the people of Gladstone and surrounding communities and this rigorous process ensures we balance all the environmental, social and economic impacts of this world-scale CSG to LNG project," he said.
The environmental impact statement is available at www.arrowenergy.com and comment is open for six weeks from Monday.