Ann: Voluntary Suspension, page-259

Perhaps "Spodumene/MRL" is referring to loading Spod via MRL (MIN) equipment?  Berth 3 was dedicated to iron ore, but it looks like it has recently been upgraded to cater for all vessels.

30 Oct 2018 - http://australianminingreview.com.au/anchors-aweigh/ (note, article only refers to GXY and A40/TAW for spod and MIN for Iron Ore)

“Amendments to a Southern Ports’ environmental licence allowed export of spodumene concentrate through Esperance Port, which secured ongoing exports from Galaxy Resources and attracted new customer Tawana Resources during FY17-19,” Mr Byers said.

Export of lithium at Esperance almost quadrupled through FY18 increasing from 55,000 tonnes to 202,000t.

Mr Byers said the amended licence would facilitate additional trade of up to 1 million metric tonnes per annum for export of spodumene using a tipping container system.

“We continue to work with our current spodumene concentrate proponents Galaxy and Tawana Resources to facilitate export of their product and continue to talk to other potential proponents about future exports,” he said.

Qube Bulk had also recently constructed a new state-of-the-art lithium bulk storage facility in Esperance, which would facilitate Galaxy and Tawana’s exports through the port.

Then at Esperance, the company was progressing plans to improve the Berth 3 facility.

“We have designed upgrades to the dedicated iron ore Berth at Esperance to take advantage of the new capacity that would enable the berth to cater to all vessels, including cruise ships,” Mr Byers said.