Perpetua Resources Corp. (‘Perpetua Resources’ or ‘Perpetua’), a development-stage company, engages in acquiring mining properties with the intention of exploring, evaluating and placing them into production.
The company’s principal business is the exploration and, if warranted and subject to the receipt of required permitting, redevelopment, restoration, and operation of the Stibnite Gold Project in Idaho, USA. The company is undertaking an extensive permitting process for the redevelopment an...
Perpetua Resources Corp. (‘Perpetua Resources’ or ‘Perpetua’), a development-stage company, engages in acquiring mining properties with the intention of exploring, evaluating and placing them into production.
The company’s principal business is the exploration and, if warranted and subject to the receipt of required permitting, redevelopment, restoration, and operation of the Stibnite Gold Project in Idaho, USA. The company is undertaking an extensive permitting process for the redevelopment and restoration of the Project.
The company’s principal mineral project is the Stibnite Gold Project, which contains several gold, silver, and antimony mineral deposits. The company’s current focus is to explore, evaluate, and potentially redevelop three of the deposits known as the Hangar Flats Deposit, West End Deposit, and Yellow Pine Deposit, all of which are located within the Stibnite Gold Project, as well as reprocess certain historical tailings located on the Project. These development activities would be undertaken in conjunction with a major restoration program designed to address legacy impacts related to historical mining activities in the Project area.
The company’s subsidiaries’ property holdings at the Stibnite Gold Project consist of a contiguous package of unpatented federal lode claims, unpatented federal mill sites, patented lode mining claims, and patented mill sites. As of December 31, 2024, this land position encompassed approximately 11,548 hectares held in 1,674 unpatented lode claims and mill sites, and patented land holdings. A subsidiary of the company acquired these rights through a combination of purchases, transactions, and staking under the 1872 Mining Law, and holds a portion under an option agreement. Bureau of Land Management claim rental payments and filings are as of the date of this filing, and the claims are all held in good standing.
Properties
The company has only one material mining property, the Stibnite Gold Project, a formerly abandoned, brownfield mine site in rural Idaho, USA. The company holds the Stibnite Gold Project through its wholly owned subsidiary Idaho Gold Resources Company, LLC.
On January 3, 2025, the USFS issued the ROD approving the Modified Mine Plan for the Project. With the receipt of the ROD, the company is currently focused on advancing the Project towards a construction decision, including finalizing the remaining federal and state permits, and securing project financing. The Modified Mine Plan, approved by the USFS in the ROD, contemplates mining the Yellow Pine, Hangar Flats, and West End Deposits using conventional open pit methods, conventional processing methods to extract gold, silver, and antimony, and on-site production of gold (‘Au’), and silver (‘Ag’) doré, and an antimony (‘Sb’) concentrate. Additionally, the USFS-approved Modified Mine Plan provides for an extensive reclamation and restoration program for certain historical legacy impacts to the site, including the recovery and reprocessing of historical tailings, restoration of fish passage during and after operations, relocation of historical mining wastes to engineered storage facilities, stream restoration, and reforestation of impacted areas. The Modified Mine Plan, approved by the USFS in the ROD, includes plans for decommissioning the site, including progressive and concurrent remediation, reclamation, and restoration activities, beginning at the start of construction and continuing beyond the operations phase, through Project reclamation and closure.
The Project location is in central Idaho, USA, approximately one hundred (100) miles (‘mi’) northeast of Boise, Idaho, thirty-eight (38) mi east of McCall, Idaho, and approximately ten (10) mi east of Yellow Pine, Idaho. Mineral rights controlled by Perpetua Resources include patented lode claims, patented mill sites, unpatented federal lode mining claims, and unpatented federal mill sites, and encompass approximately 28,536 acres (forty-five (45) square miles). The claims are 100% owned, except for surface rights on portions of six (6) patented mill site claims held by a third party, and twenty-seven (27) patented lode claims that are held under an option to purchase. The Project is subject to a 1.7% net smelter return royalty on gold only, and a 100% net smelter return royalty on silver; there is no royalty on antimony.
Permitting and Environmental Matters
Significantly, the company is subject to formal review under the National Environmental Policy Act (‘NEPA’) and extensive permitting requirements.
The USFS then prepared a Supplemental Draft Environmental Impact Statement (‘SDEIS’) to further evaluate the project refinements and compare the company’s proposed site access via Burntlog Route to an alternative option using current roads.
The company’s Clean Water Act (‘CWA’) Section 404 permit application, proposed Compensatory Mitigation Plan, and associated financial assurance remain under review by the U.S. Army Corps of Engineers (the ‘Army Corps’) after the public comment period ended in October 2023. The Army Corps has been a part of the review process as a cooperating agency since the company began the federal NEPA permitting process and has been formally evaluating the Section 404 permit application and proposed Compensatory Mitigation Plan since 2023. Perpetua expects the permit to be issued in the first half of 2025.
As of December 31, 2024, Perpetua Resources determined it had completed all Phase 1 response actions required by the ASAOC and filed Removal Action Completion Reports (‘RACR’) with the U.S. EPA and USDA with respect to such completion. Pursuant to the terms of the ASAOC, the two federal agencies are reviewing Perpetua Resources’ RACR to ascertain whether they agree that the required Phase 1 activities are complete. The ASAOC includes a process under, which the company and the signatory federal agencies will evaluate whether the company will proceed with additional response actions after the Phase 1 work has been certified by the federal agencies as complete.
The company’s Project is subject to environmental review under NEPA.
The company entered into an ASAOC with the U.S. EPA and the USDA in 2021 to conduct a number of time-critical removal actions focused on improving water quality in several areas of the site. The company filed RACR with the U.S.
The company’s operations are subject to several environmental regulations and guidelines regarding various protected species and their habitats, and include the federal Endangered Species Act, the Migratory Bird Treaty Act, and the Bald and Golden Eagle Protection Act, alongside similar state laws.
The company entered into a settlement of this litigation with the Nez Perce Tribe in 2023.
History
The company was founded 2009. The company was incorporated in 2011. It was formerly known as Midas Gold Corp. and changed its name to Perpetua Resources Corp. in 2021.