Mine · Sweetwater County, Wyoming, United States

Big Island Mine & Refinery

Big Island Mine & Refinery is a mine in Sweetwater County, Wyoming, United States, owned by Natural Resource Partners LP; Ciner Resources LP.

Facts

Every value links to its source, and to the source's own record where it has one. Licences and last-checked dates are per row.

Fact	Value	Source
Location	Sweetwater County	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Status	Operating (active)	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Commodities	trona (mainly trona)	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Owner	Natural Resource Partners LP; Ciner Resources LP (controls the operator)	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Operator	Sisecam Wyoming, LLC	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Employees	449 people (annual average, in 2025)	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Mine type	Underground	MSHA Mines Data Set · Public domain · checked 24 Oct 2026
Coordinates	41.7206, -109.6828	MSHA Mines Data Set · Public domain · checked 24 Oct 2026

Research on this mine and its owner.Who owns it up to the parent company, its permits, resources and offtake, and an introduction to the owner.