Tilden: an iron ore operation in the United States
Tilden is an integrated mine and processing complex producing iron ore in Marquette County, Michigan (near Ishpeming), the United States, operated by Cleveland-Cliffs. The sources report 6 million long tons (as printed, rounded to the nearest million long tons); a long ton is 2,240 pounds for CY2025; the basis is 100% of the mine (100% owned), as reported by the owner. The sources do not give a whole-operation figure in usable ore that can be compared with world output, so no share is computed.
Who owns and operates it?
| Owner | Interest | As of |
|---|---|---|
| Cleveland-Cliffs | 100% | 31 December 2025 |
How much does it produce?
| Period | Output | Basis | Where in the source |
|---|---|---|---|
| CY2025 | 6 million long tons (as printed, rounded to the nearest million long tons); a long ton is 2,240 pounds | 100% of the mine (100% owned), as reported by the owner | printed p.33, Item 2 Properties, 'Iron Ore Production (In millions of long tons)' table, row 'Tilden', 2025 column · Cleveland-Cliffs Inc. |
Status: operating, as of 31 December 2025.
- The 10-K's production table is headed iron ore production in millions of long tons and does not say whether the tonnage is pellets or crude ore; Item 1 and Item 2 describe production capacity in long tons of iron ore pellets. Cleveland-Cliffs idled the Minorca mine and partly idled the Hibbing mine in 2025; Hibbing is reported at the company's 85.3% ownership share and is not listed here.
- The 10-K describes an open pit truck and shovel mine, a concentrator and an on-site pellet plant at Tilden, which produces hematite concentrate.
- Cleveland-Cliffs prints the figure rounded to the nearest million long tons, which is too coarse for a share of world output to be computed.
How does it compare?
Other iron ore operations on this site: Hamersley mines (Rio Tinto Pilbara), Hope Downs (Rio Tinto and Hancock Prospecting), Robe River - Robe Valley, Robe River - West Angelas, Iron Ore Company of Canada (IOC), Simandou Blocks 3 and 4 (SimFer), Western Australia Iron Ore (WAIO), Fortescue Pilbara hematite operations, Iron Bridge (magnetite), Onslow Iron, Serra Sul (S11D), Carajas, Serra Norte, Carajas. In the United States: United Taconite, Northshore. See where iron ore comes from for the country totals, the country page for United States, and Cleveland-Cliffs for its other operations here.
Sources
- Cleveland-Cliffs Inc.: Annual Report on Form 10-K for the year ended 31 December 2025 (annual report (SEC Form 10-K), CY2025 with 2024 and 2023 comparatives). Opened 4 November 2026; used: printed pp.1, 31, 33-35 (Item 2 Properties).
- U.S. Geological Survey: Mineral Commodity Summaries 2026: Iron Ore (government statistical summary, 2025 (world and country mine production of usable ore)). Opened 3 November 2026; used: world and country mine production table, usable ore.
Method and limits
- Reported, not estimated. Output is the figure the operator or owner published, in the unit it used. This site does not estimate output where none is published.
- Shares. A share divides output in usable ore by the USGS world or country total for 2025. Where the operator's year is a fiscal year or the unit is a concentrate or a carbonate equivalent, the share is approximate or not given.
- What is compared. Operators print tonnes of ore: saleable production for most, run-of-mine and pelletizing feed for Vale, and shipments for Fortescue and Onslow Iron, mostly as wet tonnes. The figure is compared with the USGS usable-ore total, which does not state a moisture basis, so the share is indicative.
- Whole operation or owner's share. The basis column says which. A joint venture's output is never counted twice.
- Partial list. Only operations with a published figure are listed, so the rank is among those on this site, not among every iron ore mine. Shares of a country's output mix periods and bases, so treat them as indicative.
- Made with AI assistance, checked against sources. The facts were gathered from the documents above by AI-assisted research and re-checked against those documents by a second, independent pass; the page text is generated from the data. No professional review took place. How the site is made. To report an error, contact us; fixes are logged on the corrections page.