Fortescue chief executive Nev Power conceded the company's rail was already operating at capacity, having shipped 165.4 million tonnes last financial year, but it hoped to create additional capacity through operating efficiencies by the time Extension was in production. The agreement allowed Fortescue a bit of wriggle room, noting AAMC may need to deliver the ore directly to the port or alter the amount delivered to the rail based on "prevailing rail volume and any potential for surplus capacity". Persistent rumours have swirled that Fortescue has been in discussions over potential asset sales, including the potential sale of a stake in its infrastructure assets.