Denison Mines starts full-scale construction at Phoenix ISR uranium mine in Saskatchewan

• Denison Mines transitioned the Phoenix in-situ recovery uranium project to full-scale construction, starting perimeter freeze wall installation for Phase 1.
• Site preparation began in March 2026; temporary camp commissioning lifted Wheeler River accommodation capacity to nearly 400 workers.
• About 20% of overall site civil work is complete; civil subgrade work for the process plant and wellfield is near 100% complete.
• Concrete foundation work for the substation and main process plant is expected to start in August.
• Construction is set to accelerate with a second shift to support first-year milestones, including freeze wall installation and airstrip earthworks.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Denison Mines Corp. published the original content used to generate this news brief on July 28, 2026, and is solely responsible for the information contained therein.