United Taconite Property (UTAC) - Thunderbird Mine Feasibility Study: $591M NPV, $1.15B Capex
Cleveland-Cliffs Inc.'s United Taconite Property (UTAC) - Thunderbird Mine in St. Louis County, Northeastern Minnesota, USA has a Feasibility Study outlining an after-tax NPV of $591M and initial capital of $1.15B. The mine plan runs 51 years at about 5.1 MLT/y pellets per year.
Cleveland-Cliffs Inc.'s United Taconite Property (UTAC) - Thunderbird Mine has reported Feasibility Study results for the iron ore (magnetite/taconite pellets) project in St. Louis County, Northeastern Minnesota, USA. The study headlines an after-tax net present value of $591M at a 10% discount rate. It reflects Cleveland-Cliffs Inc.'s (CLF) latest disclosed economics for the asset.
Economics. The after-tax NPV is $591M using a 10% discount rate. Initial capital expenditure is estimated at $1.15B. Economics are based on Three-Year Trailing Average Revenue $98/WLT pellet (base case); $90/LT wet standard pellet price used for Mineral Reserve/resource pit optimization.
Production and mine plan. The project envisions an open-pit operation. Life of mine is 51 years. Average annual production is approximately 5.1 MLT/y pellets. Average head grade is 22.3% MagFe. Metallurgical recovery averages 33.3%. The open-pit strip ratio is 1.1.
Resources and ownership. The company holds a 100% interest in the project.
These figures are extracted from Cleveland-Cliffs Inc.'s technical disclosures and reflect the most recent Feasibility Study 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 |
|---|---|---|---|
| Proven | 143.1 MLT | 23.1% MagFe | 49.6 MLT wet pellets |
| Probable | 631.5 MLT | 22.1% MagFe | 208.0 MLT wet pellets |
| Proven & Probable | 774.6 MLT | 22.3% MagFe | 257.6 MLT wet pellets |
| Category | Tonnage | Grade | Contained |
|---|---|---|---|
| Measured | 91.8 MLT | 23.6% MagFe | 32.5 MLT wet pellets |
| Indicated | 638.6 MLT | 22.2% MagFe | 199.2 MLT wet pellets |
| Measured & Indicated | 730.4 MLT | 22.3% MagFe | 231.8 MLT wet pellets |
| Inferred | 25.9 MLT | 21.5% MagFe | 8.0 MLT wet pellets |
Our Analysis
- NPV after-tax
- $591M
higher than 49% of 515 projects we track
- Initial capex
- $1.15B
195% of NPV
costlier than 81% of 484 projects we track
- Mine life
- 51yrs
- Study price assumption
- Three-Year Trailing Average Revenue $98/WLT pellet (base case); $90/LT wet standard pellet price used for Mineral Reserve/resource pit optimization
This is a feasibility-stage iron ore project in St. Louis County, northeastern Minnesota, and the first thing to say about it is that it does not stand out. Its after-tax NPV of $591M ranks above 49% of the 515 projects we track across all commodities, which is the definition of the middle of the pack. The capital-intensity ranking is weaker still: initial capex of $1.15B, equal to 195% of NPV, sits above only 19% of the 484 projects we track. An investor is not buying an outlier here, in either direction.
What makes the ranking tolerable is the company attached to it. The build cost is roughly 0.2x a US$6.28B market cap, a mid-cap with 12 projects in our coverage. A company of that size can absorb a $1.15B commitment without the financing becoming an existential question, and the NPV, while well below market cap on a rough currency-adjusted basis, is not the whole of what the market is paying for. That gap cuts both ways: it can reflect an asset the market has not yet priced, or a market that is discounting something, whether dilution, execution, or the long permitting road that American iron ore projects tend to face.
The feasibility study is the part that deserves the most weight. Unlike a scoping exercise, an FS is a build-ready estimate with a typical plus or minus 15% band, and a 51-year mine life gives the NPV room to breathe. The study's base case rests on a three-year trailing average revenue of $98/WLT pellet, with $90/LT wet standard pellet used for pit optimization. The returns are therefore a function of where pellet pricing settles over decades, not quarters, and the lower figure used for pit design is the more instructive of the two: it tells you how the reserve was drawn, and it is the assumption that would be tested first if pricing ran below the base case. That is the question: can a mid-cap with a diversified portfolio carry a capital-intensive, multi-decade iron ore build to production on the strength of a trailing-average price?
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.