The objective of the 2022 PEA Update was to integrate updated long-term prices for zinc and lead metal, as well as reduced life-of-mine water management cost estimates based on hydrogeological modelling, that reduced dewatering volume estimates by 30% compared to the 2020 PEA with potential for a further reduction of approximately 15% for the dewatering volume estimates as the project advances to feasibility
as well as cost escalations in CAPEX and OPEX.
| After-tax internal rate of return | 25% |
| After-tax net present value (Discount rate 8%) | $602M |
| After-tax payback period (years) | 3.8 |
| Pre-production CAPEX (including $106.6M Contingency) | $653M |
| Average annual LOM production zinc | 329Mlb |
| Average annual LOM Production lead | 141Mlb |
| Life of mine (LOM) | 12 Years |
| Total mineral resources Mined (2022 MRE) | 46.9Mt |
| Average ZnEq diluted (12%) grade of mineral resources mined | 6.1% |
| Gross revenue after royalty (LOM) | $5,625M |
| After-tax operating cash flow (LOM) | $1,279M |
| C1 Costs over LOM (ZnEq) (includes mine site cost plus smelting, transport, and royalty) | US$0.61/lb |
| All-in costs (ZnEq) (C1 plus sustaining CAPEX) | US$0.80/lb |
| LOM zinc price | US$1.37/lb |
| LOM lead price | US$0.97/lb |
| FX rate (CAD:USD) | 1.27 |