Calumet & Hecla Mining Company

E884939

American company copper mining company mining company

Calumet & Hecla Mining Company was a major American copper mining company based in Michigan’s Keweenaw Peninsula that dominated U.S. copper production in the late 19th and early 20th centuries.

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Observed surface forms (1)

Surface form	Occurrences
Calumet and Hecla Mining Company (historically based in area)	1

Statements (49)

Predicate	Object
instanceOf	American company ⓘ copper mining company ⓘ mining company ⓘ
associatedWithEvent	Copper Country Strike of 1913–1914 NERFINISHED ⓘ
builtInfrastructure	churches ⓘ company stores ⓘ hospitals ⓘ miners’ housing ⓘ railroad facilities ⓘ schools ⓘ
category	Copper mining companies of the United States ⓘ History of the Upper Peninsula of Michigan NERFINISHED ⓘ
companyTown	Calumet, Michigan NERFINISHED ⓘ
country	United States of America ⓘ surface form: United States
declinePeriod	early to mid 20th century ⓘ
employed	thousands of miners and support workers ⓘ
formedByMergerOf	Calumet Mining Company NERFINISHED ⓘ Hecla Mining Company (Michigan copper) NERFINISHED ⓘ
geologicalSetting	Keweenawan copper deposits NERFINISHED ⓘ
headquartersLocation	Calumet, Michigan NERFINISHED ⓘ
heritageStatus	part of Keweenaw National Historical Park interpretive area ⓘ
inception	1866 ⓘ
industry	copper mining ⓘ metal mining ⓘ
laborIssue	dangerous underground conditions ⓘ labor disputes with miners ⓘ long working hours ⓘ
legacy	historic mine buildings and shafts in Calumet, Michigan ⓘ influence on the economic development of Michigan’s Keweenaw Peninsula ⓘ role in the history of American industrialization ⓘ
location	Keweenaw Peninsula NERFINISHED ⓘ
mainResource	native copper ⓘ
notableFor	being one of the world’s leading copper producers in its heyday ⓘ dominating U.S. copper production in the early 20th century ⓘ dominating U.S. copper production in the late 19th century ⓘ
operatedMine	C&H Conglomerate lode NERFINISHED ⓘ Calumet Mine NERFINISHED ⓘ Hecla Mine (Michigan) NERFINISHED ⓘ
peakPeriod	early 20th century ⓘ late 19th century ⓘ
product	copper ⓘ copper ingots ⓘ copper wire rod ⓘ
reasonForDecline	depletion of high‑grade ore ⓘ falling copper prices ⓘ increasing mining costs ⓘ
region	Upper Peninsula of Michigan NERFINISHED ⓘ
significantEvent	merger of Calumet and Hecla mines in 1866 ⓘ
state	Michigan (most of state) ⓘ surface form: Michigan

Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Calumet Historic District → associatedWith → Calumet & Hecla Mining Company ⓘ

Calumet Unit → associatedWith → Calumet & Hecla Mining Company ⓘ

Calumet Township, Michigan → hasHistoricCompany → Calumet & Hecla Mining Company ⓘ

this entity surface form: Calumet and Hecla Mining Company (historically based in area)