Mining History
Miners used this simple pan-and-water technique to separate gold from lighter sediment.
Gold Panning
How many active mines and exploration sites does Coeur own?
8
Gold cyanidation is typically operated at high pH to reduce formation of this toxic gas.
HCN
The organization that certifies us as compliant with Cyanide Code.
International Cyanide Management Institute (ICMI)
Testing done at the process plant yearly to monitor Mercury emissions.
Stack Testing
This discovery at Sutter's Mine kicked off one of the most famous gold rushes in history.
California Gold Rush
The year that Coeur Mining acquired Wharf.
2015
This pH range is commonly targeted in cyanide leaching.
10.5-11
Per Cyanide Code, what is the limit for Cyanide WAD in open waters.
50
The maximum Cyanide concentration allowed in environmental ponds.
0.5 mg/L WAD
The Black Hills Gold Rush began after this 1874 military expedition reported gold in the region.
The Custer Expedition
The current CEO of Coeur Mining.
Mitch Krebs
The sizing target for our crusher for ore placed on pad.
83% pass of 1/2 inch
Years between Cyanide recertification audits at our mine site.
3
The purpose of the microbes or "bugs" used in the environmental treatment plants.
Removing nitrates.
This mining tycoon helped buy and develop the Homestake Mine.
George Hearst
How Coeur Mining got its name.
The city it was founded in, Coeur d'Alene Idaho.
This dissolved gas concentration can limit gold leaching rate if too low.
Oxygen (O2)
True or False; it is mandatory for a gold or silver mine to be Cyanide code certified.
False, it is voluntary.
The department within the State do we work with for Environmental permitting and reporting.
Department of Agriculture and Natural Resources (DANR)
The Homestake Mine is famous in physics history because of an experiment studying these tiny particles from the sun.
Neutrinos
The number of employees that work at Coeur Mining.
4,200
This gold complex is the main dissolved species in alkaline cyanide leaching.
Aurocyanide [Au(CN)2]-
There are 9 principles included in Cyanide Code, name 5 or more of these principles.
1. Production, 2. Transportation, 3. Handling and Storage, 4. Operations, 5. Decommissioning, 6. Worker Safety, 7. Emergency Response, 8. Training, and 9. Dialogue.
Wharf facilitates this form of reclamation, where we reclaim land as we mine.
Concurrent Reclamation