• Silver Bow Mining re-established underground access at the Rainbow Block silver-zinc project in Montana via rehabilitation of the historic Chief Joseph Portal.
• Milestone enables the first underground exploration in the Butte Mining District in about 35 years, supporting faster resource drilling.
• Next step targets rehabilitation of the Chief Joseph Decline, followed by underground drill stations on the 200 Level for resource definition drilling.
• MSHA issued Federal Mine ID No. 24-02827 under “Silver Bow Mine,” clearing the company to conduct underground work at Rainbow Block.
• Surface preparation started for a new Rainbow Portal, intended to expand underground access as exploration advances.

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. Silver Bow Mining Corp. published the original content used to generate this news brief via Business Wire (Ref. ID: 202608190833BIZWIRE_USPR_____20260819_BW337097) on August 19, 2026, and is solely responsible for the information contained therein.