United Taconite Property (Thunderbird Mine) Production Update: $591M NPV Over a 51-Year Mine Life
Cleveland-Cliffs Inc.'s United Taconite Property (Thunderbird Mine) in St. Louis County, Northeastern Minnesota, USA (Mesabi Iron Range) has a production guidance outlining an after-tax NPV of $591M. The mine plan runs 51 years at about 5.1 MLT pellets (approximately 5.3 MLT capacity) per year.
Cleveland-Cliffs Inc.'s United Taconite Property (Thunderbird Mine) has reported production guidance results for the iron ore (taconite pellets) project in St. Louis County, Northeastern Minnesota, USA (Mesabi Iron Range). 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. Economics are based on Three-Year Trailing Average Revenue $98/WLT pellet; Mineral Reserves evaluated at $90/LT wet standard pellet price FOB Lake Superior (three-year trailing average realized product revenue rate); Mineral Resource pit shells used US$90/LT pellet value.
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 pellets (approximately 5.3 MLT capacity). Average head grade is 22.3% MagFe (crude ore). Metallurgical recovery averages 33.3%. The open-pit strip ratio is 1.1 (waste units to crude ore units).
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 Production Update 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 50% of 494 projects we track
- Mine life
- 51yrs
- Study price assumption
- Three-Year Trailing Average Revenue $98/WLT pellet; Mineral Reserves evaluated at $90/LT wet standard pellet price FOB Lake Superior (three-year trailing average realized product revenue rate); Mineral Resource pit shells used US$90/LT pellet value
This is not a development story at all. The asset is already producing, and the figures we are looking at are operating-mine numbers rather than a forward study, which puts it in a different category from most of what we track: a 51-year mine life on the Mesabi Iron Range in St. Louis County, Minnesota, turning out iron ore taconite pellets. The after-tax NPV of $591M ranks higher than 50% of the 494 projects in our database across all commodities. That is the honest read on the rank: solidly mid-pack, not an outlier in either direction. There is no development risk to price here, but there is also no re-rating catalyst of the kind a new build can offer.
The constraint is scale, and it runs the opposite way to most juniors. With a US$7.34B market cap, the company is a mid-cap, and the NPV sits well below that market cap on a rough currency-adjusted basis. This is one of 10 projects we track for the company, a diversified portfolio. So the project is a contributor, not a company-maker: an investor buying this name is buying the portfolio and the operating cash flow, not a single-asset leverage play. The usual NPV-to-market-cap discount question does not really apply when the asset is this small relative to the equity that owns it.
That leaves the price assumption as the thing to watch. Reserves are evaluated at $90 per long ton wet standard pellet FOB Lake Superior, a three-year trailing average realized product revenue rate, with resource pit shells on the same $90 basis and revenue averaging $98 per WLT. Treat that as a sensitivity rather than a forecast: pellet pricing is the swing factor across a 51-year reserve, and it is the one number that decides whether the mid-pack NPV holds.
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.