Imperial Reports Production Update for 2025 First Quarter and Petition Filed Relating to the Mount Polley Tailings Storage Facility Raise

Core Viewpoint - Imperial Metals Corporation reported significant increases in copper and gold production for Q1 2025 compared to Q1 2024, with copper production up 28% and gold production up 33% [1] Production Summary Mount Polley Mine - Copper production for Q1 2025 was 8.904 million pounds, up from 7.355 million pounds in Q1 2024, representing a 21% increase [2][3] - Gold production for Q1 2025 was 10,621 ounces, compared to 10,009 ounces in Q1 2024, a 6% increase [2][3] - Ore milled increased to 1,721,769 tonnes in Q1 2025 from 1,671,505 tonnes in Q1 2024, a 3% increase [3] - Copper grade improved to 0.282% in Q1 2025 from 0.251% in Q1 2024, while gold grade slightly decreased to 0.275 g/t from 0.282 g/t [3] - Recovery rates for copper and gold improved to 83.3% and 69.8% respectively in Q1 2025, compared to 79.4% and 66.0% in Q1 2024 [3] Red Chris Mine - Copper production for Q1 2025 was 23.126 million pounds, up from 16.660 million pounds in Q1 2024, a 39% increase [5][6] - Gold production for Q1 2025 was 21,663 ounces, compared to 9,507 ounces in Q1 2024, a 128% increase [5][6] - Ore milled decreased slightly to 2,049,475 tonnes in Q1 2025 from 2,100,354 tonnes in Q1 2024 [6] - Copper grade increased significantly to 0.62% in Q1 2025 from 0.43% in Q1 2024, while gold grade improved to 0.54 g/t from 0.26 g/t [6] - Recovery rates for copper and gold were 82.6% and 60.5% respectively in Q1 2025, compared to 83.4% and 53.6% in Q1 2024 [6] Legal and Community Engagement - Xatśūll First Nation filed a Petition in the Supreme Court of British Columbia seeking a judicial review of decisions that authorized an increase in the height of the dam at the Tailings Storage Facility [8][9] - The petition alleges that the decisions were made without a legally required environmental assessment and breached duties owed to Xatśūll as an Indigenous people [9] - Imperial and its subsidiary, Mount Polley Mining Corporation, have engaged with Indigenous communities, including Xatśūll, throughout the permitting process and have maintained a positive relationship with the Williams Lake First Nation [10]