Western Lithium announced the results of a National Instrument 43-101 (NI 43-101) compliant Preliminary Assessment and Economic Evaluation (PAEE) on its Kings Valley Lithium Project in Nevada, USA. The operation is planned as an open-pit operation using conventional truck/shovel mining methods. The life-of-mine plan shows a total of 32 million tonnes of mill feed and 78 million tonnes of waste over an 18-year mine operating life at a cut-off grade of 0.270% lithium. Cash operating costs estimated to be US$1,967 per tonne (US$0.89/pound) of lithium carbonate, after potassium sulphate by-product credit with a pre-tax internal rate of return (IRR) of 28%….more at InfoMine