Roy Hill is owned by Australia's richest woman, Gina Rinehart, through the Hancock Prospecting Company.
Construction will start on next Tuesday, with completion in November 2015.
Several South Korean, Japanese and Taiwanese companies own 30% of the project.
The Roy Hill mine will produce 55MTPA.
The mine is 270km south of Port Hedland, in the Chichester Range.
DISCLAIMER: Since the RP search function isn't working it is not easy to say if this matter isn't covered by another thread.