Sandman PEA: $203M NPV, 104.9% IRR
Borealis Mining Company Ltd.'s Sandman in 12 miles NW of Winnemucca, Nevada, USA has a Preliminary Economic Assessment (PEA) outlining an after-tax NPV of $203M, an after-tax IRR of 104.9%, and initial capital of $36M. The mine plan runs 9 years at about 37500 oz Au per year.
Borealis Mining Company Ltd.'s Sandman has reported Preliminary Economic Assessment (PEA) results for the gold project in 12 miles NW of Winnemucca, Nevada, USA. The study headlines an after-tax net present value of $203M at a 6% discount rate. It reflects Borealis Mining Company Ltd.'s (BOGO.V) latest disclosed economics for the asset.
Economics. The after-tax NPV is $203M using a 6% discount rate. After-tax IRR is 104.9%. Initial capital expenditure is estimated at $36M. The study models a payback period of 1.1 years. All-in sustaining costs are pegged at 1823 USD/oz. Economics are based on $2,600/oz gold.
Production and mine plan. The project envisions an open-pit operation. Life of mine is 9 years. Average annual production is approximately 37500 oz Au. Average head grade is 0.73 g/t gold.
Resources and ownership. Mineral resources: Indicated: 18,550,000 t @ 0.73 g/t Au = 433,000 oz; Inferred: 3,246,000 t @ 0.58 g/t Au = 60,800 oz.
These figures are extracted from Borealis Mining Company Ltd.'s technical disclosures and reflect the most recent PEA on file. Compare this project against other developers and producers in our project economics database, and always verify the numbers against the original technical report before making any investment decision.
Our Analysis
A 104.9% after-tax IRR places this project in the top quartile of the 90 gold developers we track, well above the 15-20% threshold that typically clears financing for single-asset juniors. The 6% discount rate used for NPV reporting is low, which flatters the $203M NPV—but even so, the NPV is roughly double the company’s current market cap. That gap can be read two ways: either the market has not yet priced in the project’s value, or it is discounting for permitting, jurisdiction, or execution risk. Capital intensity is low at $36M (18% of NPV), and the 1.1-year payback reduces refinancing risk, but the 9-year mine life is short for a pure gold developer.
The study’s $2,600/oz gold assumption sits well below the live spot of $4,193.80/oz, implying material upside to returns if prices hold—but also raising the question of whether the study’s base case is conservative or simply dated. The single most important risk is jurisdictional: a short-mine-life, high-return project in a tier-2 jurisdiction often faces permitting delays that erode the IRR faster than a longer-life asset would. Watch for any local regulatory headwinds that could stretch the timeline beyond the study’s assumptions.
Our take, benchmarked against the project economics in the Mining Stocks database. Figures are estimates drawn from company technical reports — not investment advice; always verify against the source filing.