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What is the Largest Underground Mine in the United States?

Published in Underground Mining US 2 mins read

The MC#1 Mine in Illinois was identified as the largest underground mine in the United States, based on its production in 2021.

This significant operation underscores the scale of mining activities crucial to the U.S. economy. Situated in Illinois, a state historically rich in coal reserves, the MC#1 Mine plays a pivotal role in the nation's energy sector.

Key Facts About the MC#1 Mine

In 2021, the MC#1 Mine showcased its impressive operational capacity by producing a substantial volume of raw materials.

Feature Detail
Location Illinois, United States
Ownership ACNR Holdings Inc.
Production (2021) Approximately 16.3 million metric tons per annum
Product Type Run-of-Mine (ROM) materials
Significance Largest underground mine in the U.S. by production

The production figure of approximately 16.3 million metric tons per annum (mmtpa) refers to its Run-of-Mine (ROM) output. ROM material is the raw ore or mineral extracted directly from the mine before any processing or beneficiation. This high volume highlights the mine's extensive infrastructure and advanced operational methods required for such large-scale underground extraction.

Ownership and Impact

The MC#1 Mine is owned by ACNR Holdings Inc., a major player in the mining industry. The operation of mines like MC#1 contributes significantly to local economies through job creation, supply chain demands, and tax revenues, while also providing essential resources for various industries across the country.

Understanding the scale of such operations offers insight into the complex engineering and logistical challenges involved in modern underground mining, which continues to be a vital component of the United States' industrial landscape.