Silver Bow Mining Corp. Initiates Chief Joseph Portal and Underground Decline Rehabilitation

Butte, Montana--(Newsfile Corp. - May 12, 2026) - Silver Bow Mining Corp. (NYSE American: SBMT) ("Silver Bow Mining" or the "Company") announced today that it signed a contract with MES Mining – a division of Mining & Environmental Services LLC ("MES"), a U.S.-based engineering and construction firm specializing in underground mining. Under the contract with MES, the Company will rehabilitate and modernize the existing Chief Joseph portal and underground decline, to enable the restart of underground exploration activities in Butte, Montana.