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    Moon River’s Davidson NPV jumps to $879M: economics and design notes for mine planners

    October 24, 2026|

    Reviewed by Joe Ashwell

    Moon River’s Davidson NPV jumps to $879M: economics and design notes for mine planners

    First reported on MINING.com

    30 Second Briefing

    Moon River Moly’s updated PEA lifts the Davidson underground molybdenum-copper-tungsten project’s after-tax NPV to C$1.23 billion at an 8% discount rate and cuts payback to 1.5 years, driven by a switch from gravity separation to tungsten flotation and revised capex/opex. The 10,000 t/d, 20-year operation now targets average annual output of 13.27 million lb molybdenum, 1.5 million lb copper and 1.51 million lb WO₃, with all-in sustaining costs of $4.36/lb Mo net of by-products. Tungsten resources are upgraded to 80.8 million tonnes measured and indicated, and the mine plan includes battery-electric equipment, paste backfill and dry-stack tailings.

    Technical Brief

    • Updated PEA assumes long-term prices: US$23.41/lb Mo, US$4.65/lb Cu, US$43.25/lb WO₃.
    • Using September 2026 average prices, after-tax NPV increases to C$3.0 billion and IRR to 57%.
    • Initial capex now C$750.1 million, including C$118.5 million contingency; previous estimate C$672.3 million.
    • Tungsten output in the 2025 PEA was 334,000 lb WO₃ per year, now more than quadrupled.
    • Upgraded resource: 80.8 Mt measured and indicated at 0.182% Mo, 0.037% Cu, 0.036% WO₃.
    • Existing underground development exceeds 2.1 km of exploration tunnels within Hudson Bay Mountain, 9 km from Smithers.
    • Mine design includes underground processing plant, paste backfill and dry-stack tailings to minimise surface footprint.
    • Baseline environmental studies and First Nations engagement underway ahead of a planned PFS in H1 2027.
    • Moon River also owns 25% of the nearby Endako molybdenum mine, currently under restart evaluation.

    Our Take

    With Moon River Moly’s Davidson project in British Columbia modelled on long-term molybdenum and copper prices, it stands out in our database as one of the few polymetallic moly–copper–tungsten projects with a 20-year mine life, which could give it optionality to cycle through multiple commodity price regimes.

    The updated all-in sustaining cost for molybdenum at Davidson, net of copper and WO₃ credits, places it towards the lower end of cost assumptions seen in recent molybdenum-focused pieces in our coverage, signalling potential resilience if moly prices soften from the September 2026 levels used in the upside case.

    Moon River’s 25% interest in the idled Endako molybdenum mine, combined with the planned Davidson development near Smithers, positions the company as a more regionally concentrated moly player in central British Columbia than most juniors in our mining project database, which may help in sharing infrastructure and regional expertise but concentrates jurisdictional risk.

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    Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.

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