Mackay Potash Project

The Mackay Potash Project is situated in Western Australia, approximately 785 kilometres south of the Port of Wyndham. The Project comprises twelve tenements covering a total area of 4,370 square kilometres spanning Lake Mackay, which is the world’s largest undeveloped SOP-bearing salt lake.


Agrimin signed a Native Title Agreement on 8 November 2017 with representatives of the Kiwirrkurra people. The agreement provides the necessary native title consents for the project’s development and operations.

On 7 May 2018, Agrimin reported the results of a positive Pre-Feasibility Study (PFS) for the project. For the PFS announcement Click Here

The project is based on the extraction SOP mineralisation which is dissolved in the brine (hypersaline groundwater) within Lake Mackay. The salt lake is a single aquifer unit with the brine starting at just 40 centimetres below ground surface and extending beyond the deepest drilling of 30 metres.

The project will utilise a network of shallow trenches to extract brine from only the top 3 metres of the salt lake.

Brine is planned to flow along the trenches and fed into a series of solar evaporation ponds where SOP-bearing salts will precipitate. These salts will contain high-grade SOP and will be wet harvested and pumped to the process plant.

The process plant has been designed for a capacity of 426,000 tonnes per year of SOP as dry granular product. Agrimin plans to sell its production to domestic customers or export it through the Port of Wyndham via an integrated mine-to-ship logistics chain.

The PFS assessed the economics of an initial 20 year operation. Excellent potential exists for Agrimin to increase planned production rates and/or extend the operational life of the project.

The project hosts a specific yield Mineral Resource of 123 million tonnes of SOP, comprising 3.9 million tonnes classified as Measured and 19.5 million tonnes classified as Indicated.