International Coal Group was a United States coal producer operating mines in Appalachia and the Illinois Basin. The company supplied both thermal and metallurgical coal to domestic and export markets. Integrated rail and port facilities supported large scale distribution. International Coal Group played a role in U.S. coal sector consolidation.

International Coal Group was formed in 2004 following acquisition of assets from Horizon Natural Resources.

The company expanded Appalachian coal production during the 2000s, supplying domestic and export markets.

In 2011, International Coal Group was acquired by Arch Coal.

Primary Mining Regions
International Coal Group operated mines in West Virginia, Kentucky, and Illinois within established Appalachian and Illinois Basin coal belts.

Infrastructure and Processing Facilities
Mining complexes were supported by preparation plants and rail connections linking to Gulf Coast and Atlantic export terminals.

Strategic Geographic Advantage
Dual basin presence enhanced supply flexibility and supported both domestic utilities and international metallurgical coal customers.

During 2024, former International Coal Group operations continued production under integrated corporate ownership within Appalachian and Illinois Basin regions.

Operational coordination emphasized preparation plant efficiency and rail logistics alignment with domestic and export customers.

In 2025, priorities include maintaining stable metallurgical and thermal coal output integrated with national energy markets.