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Silver Bow Mining Commences Underground Exploration Drilling at Rainbow Block, Butte, Montana

SBMT
  • Silver Bow Mining Corp. (NYSE American: SBMT) commenced underground diamond drilling at its Rainbow Block Project in Butte, Montana on November 11, 2026.
  • This marks the first underground exploration drilling in the historic Butte Mining District in over three decades.
  • Drilling is conducted from a new underground drill station located 285 feet down the Rainbow Decline at an elevation of 6,210 feet.
  • NISS Drilling is performing the work using a KMN1.4 electric underground diamond core drill.
  • Initial targets include multiple mineralized vein systems, specifically the Badger and Emily veins, following up on recent high-grade surface discoveries.
  • The Company plans to execute 30,000 feet of underground diamond drilling from the Rainbow and Chief Joseph declines during 2026 and 2027.
  • The program aims to test extensions of twelve mineralized veins beyond the current Rainbow Block Mineral Resource estimate to support resource expansion and upgrading.
  • Recent high-grade surface results include a Badger Vein intersection of 4.0 meters grading 994.2 g/t AgEq and an Emily Vein intersection of 11.2 meters grading 312.7 g/t AgEq.
  • The initial drill station is positioned to allow drilling in virtually every direction to test all twelve target veins from a single location.
  • Underground access was re-established in 2026 through the rehabilitation of the Chief Joseph Portal and the construction of the new Rainbow Decline.
  • Silver Bow Mining holds approximately 4,210 acres of patented claims and 1,427 acres of surface lands in the Butte Mining District, targeting U.S.-designated Critical Minerals.
Company
Silver Bow Mining Corp.
Keywords
NYSE:SBMT, Silver Bow Mining Corp., silver, zinc, copper, lead, gold, drilling, mining, underground, United States, montana, butte