Fremont County
Wyoming
Highlights
- Mary Ellen Mill cleaned, inventoried, and ready for upgrade.
- Diana Patented Mine is a high-grade, underground gold target.
- 112 federal mining claims staked which include 200+ historic pits, shafts, and workings.
Mary Ellen Mill
The Mary Ellen Mill located near Atlantic City, has been cleaned, inventoried, and is permitted under the Wyoming DEQ Permit #6348. Ongoing work continues toward re-opening of the mill.
Diana Patented Claim
The Diana mine is a high-grade, underground gold target situated within the patented mining claim called The Diana Lode. Permitting is in progress, and work to begin reopening the adit (shown below) will commence once approved.
Federal Mining Claims
In December of 2025, 112 lode mining claims were staked and filed with the Bureau of Land Management (BLM), encompassing +/- 200 historic pits, shafts, and workings.
Geology & Mineralization
The South Pass-Atlantic City Gold Mining District, home of Fermi’s South Pass project, is geologically similar to the high-grade gold bearing Abitibi Greenstone Belt located in Canada which has produced over 200 million ounces of gold since 1901.
Some geological research indicates that the Abitibi Greenstone Belt and the Wyoming province were connected before tectonic activity caused the Wyoming craton to rift, rotate, and move to is present-day location.
Property
Fermi Critical Minerals Corp. maintains the following property that makes up the South Pass project:
- Federal Mining Claims (112)
- The patented Diana Lode Mine
- The historic Mary Ellen Mill