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Mines/United States

Calumet and Hecla (Keweenaw) mine

Calumet and Hecla (Keweenaw) mine, United States. Closed, underground, mining copper.

Why Calumet and Hecla (Keweenaw) is famous

Hulbert found an ancient copper cache in 1858. Financing came in 1864, Alexander Agassiz led from 1867 and the merger followed in 1871. Output was 16.2 million lb of copper in the first year. The Osceola fire of 1895 killed 30. Montana overtook Michigan by 1887. Coordinates blank (no Wikidata point for the company item).1,2

Story cards

Calumet and Hecla (Keweenaw) today

Where copper is mined todayMining in United States

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People

Owned byAlexander AgassizThe Swiss-born professor who ran Calumet and Hecla for 39 years.3

Mines

An example ofGreat Orme MinesHulbert found an ancient copper cache at Calumet in 1858. Great Orme's Bronze Age mine dates to 1600 BC.1An example ofKennecott MinesBoth US copper camps: Calumet's merger of 1871, Kennecott's ore found in 1900.1

Sources

  1. Keweenaw National Historical Park timeline US National Park Service
  2. Wikidata item Q2645447 (Calumet, Michigan) Wikidata (CC0)
  3. 2026 Inductees from Mining's Past Mining Foundation of the Southwest

From the Prospector Trails mining history dataset: each fact links to the source it was checked against. Figures are as the source gives them, in the money of their day. Not investment advice.

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Cover photos from Wikimedia Commons: Chuquicamata from the ISS by Alexander Gerst (ESA), CC BY-SA 2.0.