Changes by IronClad Mining to its planned iron ore export facilities at Lucky Bay, near Cowell on Eyre Peninsula, have been endorsed by the South Australian Government.
They include the addition of a bulk container storage site.
Iron ore is to be transported from the company's Wilcherry Hill mine, north of Kimba.
Managing director Robert Mencel is expecting to get final approvals by about May.
"The next step is for IronClad to put in the documents as part of the normal development approval," he said.
"We've committed a lot of the information, it's drafted already and we believe most of the state agencies have already seen the documents and we expect have already provided advice to the Government.
"Once we have that approval, it's subject to funding and board approval. We expect construction to take some five months and to be shipping within six months."
IronClad has been testing a new offshore loading system that would let it avoid the need for a deep sea port.
In a successful trial done at Largs Bay in Adelaide, shipping containers of iron ore were loaded onto barges and moved out to sea.
A floating crane then loaded the containers onto cargo ships.