Great Boulder exercises option to lift Side Well Gold Project stake to 75% The company has enacted the Side Well option 12 months early after intersecting bonanza-grade gold earlier this year. Phase 2 RC drilling is completed and another round of aircore drilling is well underway. Great Boulder Resources Ltd (ASX:GBR) has exercised its option to acquire a 75% interest in the Side Well Gold Project in Western Australia from Zebina Minerals Pty Ltd. Under the terms of an agreement signed in July 2020, Great Boulder had a two-year option to explore Side Well before deciding to acquire a 75% interest in the project. The company has decided to exercise this option 12 months early after the Side Well project produced bonanza-grade gold results earlier this year.