Equinox Gold’s South Railroad permit: capex, schedule and NPV lens for mine planners
Reviewed by Tom Sullivan
First reported on MINING.com
30 Second Briefing
Equinox Gold has secured a positive Record of Decision from the US Bureau of Land Management for its South Railroad open-pit heap leach project on Nevada’s Carlin Trend, clearing the National Environmental Policy Act stage and allowing early works to start ahead of targeted first production in 2028. The 66.6 million tonnes of proven and probable reserves, grading 0.71 g/t gold and 5.1 g/t silver, underpin forecast output of about 104,000 oz gold per year over 10 years. An updated feasibility study pegs initial capex at $395 million and a post-tax NPV of $783 million at $3,100/oz gold, rising to $1.7 billion at $4,500/oz.
Technical Brief
- Open-pit operation will use heap leach processing, implying large leach pad earthworks and solution management systems.
- Project lies within a 25,000-hectare Carlin Trend land package, allowing potential satellite pits and shared infrastructure.
- South Railroad obtained US FAST-41 “covered project” status in 2025, enabling a more structured, time-bound federal permitting schedule.
- BLM Record of Decision completes the NEPA phase; remaining critical-path items are state permits and water rights.
- Feasibility work assumes a 5% discount rate, yielding a 48% post-tax IRR at US$3,100/oz gold and US$36.50/oz silver.
- At US$4,500/oz gold, project economics strengthen sharply to a 95% IRR and US$1.7 billion NPV.
Our Take
With a post‑tax NPV5 of $783 million against initial capex of $395 million, South Railroad sits in the upper tier of gold project economics in our database, which likely gives Equinox Gold more flexibility on sequencing capex alongside the recently approved Valentine Phase 2 expansion.
The 10‑year mine life on relatively low‑grade gold (0.71 g/t) and silver (5.1 g/t) reserves suggests the Carlin Trend location and planned scale are doing most of the heavy lifting on returns, so any cost inflation in Nevada could have a disproportionate impact on the robust 48% base‑case IRR.
The sensitivity to a $4,500/oz gold price (95% IRR) ties directly into recent coverage of gold futures trading above $4,500/oz in New York, implying that if current price strength persists, South Railroad could move from merely attractive to a capital‑priority asset within the enlarged Equinox–Orla portfolio.
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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