Windarra Gold Tailings, page-11

Hi Kip
To proccess those tails off site when the grade is about 0.6gr and due to them being in sulphides recoverys will only be about 50/60 % you will need a G/P over $2000 /oz as most plants not set up to handle this type of product, also trucking the product is expensive .
To process yourself is only option as i see it, it is cheap to move tails with water (hydraulic mining ) and plant could be set up to fine grind if required to increase recoverys. I would think 30 mil might cover costs for new plant but depends on things like current power supply ,acc camp , bore fields , tails dam ect
hope this helps.