New Amalga Gold Project PEA: $721M NPV, 56% IRR
Grande Portage Resources Ltd.'s New Amalga Gold Project in USA, Alaska (Juneau Gold Belt, near Juneau) has a Preliminary Economic Assessment (PEA) outlining an after-tax NPV of $721M, an after-tax IRR of 56%, and initial capital of $255M. The mine plan runs 7 years at about 850 t/d shipped (average) per year.
Grande Portage Resources Ltd.'s New Amalga Gold Project has reported Preliminary Economic Assessment (PEA) results for the gold project in USA, Alaska (Juneau Gold Belt, near Juneau). The study headlines an after-tax net present value of $721M. It reflects Grande Portage Resources Ltd.'s (GPG.V) latest disclosed economics for the asset.
Economics. The after-tax NPV is $721M. After-tax IRR is 56%. Initial capital expenditure is estimated at $255M. Economics are based on $3,200/oz Au (base-case) and $5,000/oz Au.
Production and mine plan. The project envisions an underground operation. Life of mine is 7 years. Average annual production is approximately 850 t/d shipped (average). Average head grade is 13.6 g/t Au avg mined grade; 17.6 g/t Au avg shipped grade after sorting.
These figures are extracted from Grande Portage Resources 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.
Reserves & Resources
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Indicated | 4.7M tonnes | 9.47 g/t Au | 1,438,500 oz Au |
| Inferred | 1.8M tonnes | 8.85 g/t Au | 515,700 oz Au |
Our Analysis
This project delivers a 56% after-tax IRR, placing it in the upper half of the 92 gold developers we track and well above the 15-20% threshold required to attract project financing for a single-asset junior. The after-tax NPV of $721M is 16.4x the company’s market cap—a gap that can signal either a deeply undervalued asset or the market’s skepticism on permitting, financing, or the compressed seven-year mine life. The $255M initial capex is capital-light at 35% of NPV, reducing funding risk, but the base-case price assumption of $3,200/oz sits meaningfully below the current spot of $3,976.40/oz, implying upside to returns if prices hold.
The key risk is jurisdiction. Alaska is mining-friendly but carries high execution hurdles—permitting in the Juneau Gold Belt is politically sensitive and can face protracted legal challenges. The study’s low discount rate flatters the NPV, and the short mine life leaves little margin for delays. The single most important watch-item is the permitting timeline; any extension beyond the study’s assumptions would pressure the IRR and the market’s willingness to price in the full NPV.
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.