Critical Milestones As Permitting Continues to Progress

BOISE, ID - Perpetua Resources Corp. expects the United States Forest Service (USFS) to publish a Supplemental Draft Environmental Impact Statement (SDEIS" or "Supplemental DEIS) for public review and comment in early Q3 2022.

During the last 18 months, the USFS and cooperating agencies have performed an extensive review of Perpetua's refined proposed action. In this time, the USFS has made substantial progress in analyzing the project refinements and preparing chapters of the preliminary SDEIS for interagency review. Perpetua anticipates the preliminary SDEIS will be circulated for cooperating agency review in Q2 2022 with a public release of the SDEIS to follow shortly thereafter.

In support of the USFS's preparation of the Supplemental DEIS, Perpetua has responded to more than 850 comments and numerous requests for additional information, including additional water modeling, sensitivity analyses, fisheries modeling, and habitat analysis. The USFS has also nearly completed all of the 17 specialist reports for cooperating agency review. Perpetua is confident that the additional evaluation contained within the SDEIS will directly address issues raised during the public review of the 2020 Draft Environmental Impact Statement ("DEIS") and believes the additional analysis and detailed review will lead to the USFS designating a preferred alternative in the SDEIS.

"For over a year, the Perpetua team has worked diligently with regulators to incorporate public feedback into our proposed project design," said Laurel Sayer, President and CEO. "We are eager to show how our improvements are designed to leave water quality and overall habitat in this historic mining district in better shape than they are in today while also responsibly producing the mineral and metals critical for our national interests. We anticipate the hard work and commitment to a thorough and transparent process will pay dividends as our project advances."