Kalium's resource is small, only 1Mt tonnes of drainable basal...

Kalium's resource is small, only 1Mt tonnes of drainable basal sand sop available so their mc is only $24m for a reason. AMN is now $80m but I fail to see how 250km of trenching is going to be feasable as it doesn't account for drawdown and recharge time. So they also have their work cut out. RWD's advantage is it's ability to draw brine from the surface aquifer and from the thick basal sand aquifer sitting at only 80m. Kalium can forget about the surface option imo as their flows are too slow for the scale of project it will have to be.