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DEQ conducts completeness review for cyanidation permit application for Perpetua Resources Idaho, Inc. 

September 1, 2023

Contact: Dana Swift, Remediation Bureau Chief,

BOISE — The Idaho Department of Environmental Quality (DEQ) received an application from Perpetua Resources Idaho, Inc. for a permit to construct, operate, and close a cyanidation facility intended to contain, treat, or dispose of process water or process-contaminated water containing cyanide.  

In accordance with the “Rules for Ore Processing by Cyanidation” (IDAPA 58.01.13), Perpetua Resources is requesting a permit to operate a cyanidation facility as part of the Stibnite Gold Project (SGP), a proposed gold mine located in Valley County, approximately 12 miles east of Yellow Pine, Idaho. The SGP is located on private and public lands within the Boise and Payette National Forests. Perpetua has 29,827 acres of mining claims comprised of both unpatented (28,477 acres) and patented (1,350 acres) claims. The SGP is also located within the historical Stibnite Mining District, an area characterized by previous mining activities including legacy mining features such as underground mine workings, rock dumps, tailings deposits, and open pits, most notably the Yellow Pine Pit. 

The cyanide permit application is available for review at DEQ’s Boise Regional Office (1445 N. Orchard, Boise, Idaho) and on DEQ’s website. Currently, DEQ is not accepting public comments on the contents of the permit application.  

DEQ will perform a completeness review of the permit application within 30 days of receiving the application. If the application is deemed complete, DEQ will either reject the application or issue a draft permit within 90 days of receiving the application. DEQ will issue public notice if the complete permit application is rejected. 

If DEQ decides to prepare a draft permit, a public comment period of 60 days will begin on the date of the public notice of the draft permit. Within 30 days of the public notice for draft permit, a public meeting will be held where oral or written comments may be provided by any person. DEQ will address public comments submitted in its Response to Public Comments. All comments must be submitted in writing during the public comment period. 

For more information, contact the following: 

Perpetua Resources Idaho, Inc. 

Alan Haslam 
Vice President – Permitting 
405 S 8 St. Suite 201 
Boise, ID 83702 

Idaho Department of Environmental Quality 

Dana Swift 
Remediation Bureau Chief 
1410 N. Hilton St. 
Boise, ID 83706 

Related Documents 

Cyanide permit application

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