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The Karinga Lakes project, which was modelled as a 40,000t per annum SOP producer at operating costs of $293/t for 20 years, was calculated to have a post-tax net present value of $80.1 million and an internal rate of return of 20.4%.
The project involves Parkway's acquired aMES technology, described as an innovate process "developed (for) a range of challenging brine streams from the mining industry, in order to recover valuable minerals, reagents as well as produce fresh water".
Parkway has a 15% stake in the project - majority owned by Verdant Minerals - with the ability to earn another 25% by spending $2 million advancing the venture.
Parkway raised $1.6 million last month by issuing new shares priced at 0.9c each for a number of "strategic growth initiatives including expanding in-house technical and commercial capabilities, to support increasing business development related activities".
Parkway started the December quarter with $1.5 million cash.
Shares in Parkway were unchanged at 1c in morning trade, capitalising the company at $19 million.
