Perpetua Resources Corp. (NASDAQ: PPTA) commenced construction activities for its Stibnite Gold Project following a May 29 federal court decision that denied opponents' request for a preliminary injunction.

The United States District Court of Idaho rejected the motion filed by special interest groups in 2025, finding that plaintiffs failed to demonstrate the planned activities would cause irreparable harm. Construction work began May 30, including initial development of the Burntlog Route infrastructure project.

The company plans additional construction of worker housing facilities, powerline upgrades, and exploration drilling during the 2026 field season. These activities build upon early works construction that began in October 2025, targeting 2029 operations and antimony delivery.

The U.S. Forest Service selected the Burntlog Route as the preferred access road after evaluating alternatives and environmental impacts. The route is designed to provide safer travel while limiting proximity to sensitive waterways and reducing environmental and residential impacts.

Perpetua has engaged local contractors representing approximately $45 million in direct work for Idaho businesses and communities during the construction season. The company has placed financial assurances approved by federal and state agencies to ensure reclamation of construction-related impacts.

The Stibnite Gold Project aims to redevelop an abandoned mining district previously mined for antimony and tungsten during World War II and the Korean War. The U.S. Department of War has identified the project as the only domestic mine capable of producing antimony volumes sufficient to meet defense demand by 2029.

The project includes environmental restoration measures intended to improve water quality, remove legacy mine waste, reconnect fish habitat, and restore streams and wetlands within the project area.