Wheeler River - Gryphon PFS: C$864M NPV, 37.6% IRR
Denison Mines Corp.'s Wheeler River - Gryphon in Saskatchewan, Canada (Athabasca Basin) has a Pre-Feasibility Study (PFS) outlining an after-tax NPV of C$864M, an after-tax IRR of 37.6%, and initial capital of C$737M. The proposed mine plan runs 6.5 years.
Denison Mines Corp.'s Wheeler River - Gryphon has reported Pre-Feasibility Study (PFS) results for the uranium (u3o8) project in Saskatchewan, Canada (Athabasca Basin). The study headlines an after-tax net present value of C$864M at a 8% discount rate. It reflects Denison Mines Corp.'s (DML.TO) latest disclosed economics for the asset.
Economics. The after-tax NPV is C$864M using a 8% discount rate. After-tax IRR is 37.6%. Initial capital expenditure is estimated at C$737M. The study models a payback period of 1.9 years. All-in sustaining costs are pegged at 25.47 USD/lb U3O8. Economics are based on US$75/lb U3O8 base case; USD:CAD FX Rate 1.35.
Production and mine plan. The project envisions an underground operation. Life of mine is 6.5 years. Average head grade is 1.7% U3O8 (Indicated).
Resources and ownership. The company holds a 95% interest in the project.
These figures are extracted from Denison Mines Corp.'s technical disclosures and reflect the most recent PFS 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 |
|---|---|---|---|
| Probable | 1,275,000 tonnes | 1.8% U3O8 | 49.7 million lbs U3O8 |
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Indicated | 1,643,000 tonnes | 1.7% U3O8 | 61.9M lbs U3O8 |
| Inferred | 73,000 tonnes | 1.2% U3O8 | 1.9M lbs U3O8 |
Our Analysis
- IRR after-tax
- 37.6%
higher than 33% of 9 projects we track
- NPV after-tax
- C$864M
higher than 44% of 9 projects we track
- Initial capex
- C$737M
85% of NPV
costlier than 89% of 9 projects we track
- Payback
- 1.9yrs
slower than 26% of 308 projects we track
- Mine life
- 6.5yrs
- Discount rate
- 8%
- Study price assumption
- US$75/lb U3O8 base case; USD:CAD FX Rate 1.35
Across the nine uranium projects we track, this one sits in the lower half on both headline measures: an after-tax IRR of 37.6% ranks above 33% of peers, and an after-tax NPV of C$864M ranks above 44%. That is not a dismissal. A 37.6% return clears the roughly 15% after-tax threshold developers typically need to attract project finance with room to spare, so the constraint here is not whether the economics work at the study's US$75/lb U3O8 base case. It is that nothing in the numbers separates this asset from the pack. An investor buying it is buying execution and scale, not a differentiated orebody.
What does separate it is how quickly the capital comes back. Payback of 1.9 years is faster than 74% of the 308 projects we track across all commodities, and for a development-stage asset that is the most useful figure on the page: it shortens the window in which the company is exposed to price and cost slippage before cash generation begins. The offset is a 6.5-year mine life, which means the payback consumes a large share of the operating window. This is a fast-return, short-duration asset, not a long-life compounding one.
Funding risk is modest. Initial capex of C$737M is about 0.2x the company's US$2.29B market cap, and this is one of 14 projects in the portfolio, so the build does not depend on a single-asset balance sheet. Capex at 85% of NPV is moderately capital-intensive but ranks lower than 11% of the nine uranium peers. The caveats are stage and price: a PFS carries roughly a plus or minus 25% band and is not yet a build decision, and the US$75/lb base case is an assumption to sensitivity-test, not a forecast. The question that decides this project is whether the company commits capital to a short-life, mid-tier return when it has thirteen other calls on its balance sheet.
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.
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