Grande Portage Resources Reports Positive Results from Preliminary Strength Testing of Mine Backfill Materials

All Samples Met or Exceeded Strength Criteria for Primary Mining Method VANCOUVER, BC / ACCESS Newswire / July 6, 2026 / Grande Portage Resources Ltd. (TSXV:GPG)(OTCQX:GPTRF)(FSE:GPB) ("Grande Portage" or the "Company") is pleased to provide a …