Boab Metals released the results of its front-end engineering and design study for the 75%-owned Sorby Hills Lead-Silver-Zinc Project in Western Australia’s Kimberley region.

The FEED study showed improvements over the January 2023 definitive feasibility study (DFS), including a net cash flow increase by $73 million and a net present value rise by $41 million.

Project metrics reported include upfront capital expenditure of $264 million, average C1 cost of US$0.36/lb payable lead, and a pre-tax NPV8 of $411 million.

Boab Metals attributed the gains to multiple factors such as process plant EPC contract pricing updates from GR Engineering Service, an optimised mining schedule, and improved metallurgical test results from the high-grade Norton deposit.