Minemakers has entered into a port access agreement with the Darwin Port Corporation for its $100 million Wonarah phosphate project in the Northern Territory.
Both entities have signed a heads of agreement which covers the shipment of rock phosphate product through the Darwin Port's shiploading facility.
Minemakers said there was enough capacity at the port for the early phases of the project's production, scheduled to start later this year.
"Both parties have agreed to work together in an accelerated program to ensure maximum efficiency of handling the rock phosphate product through the existing facilities, and will also identify future expansion requirements," Minemakers said.
In this month's federal budget, the government allocated $50 million to the Darwin port, which is on top of the NT government's commitment of $100 million.
Shares in Minemakers fell 3.5 cents to 47c at 12:35 AEST.