Complex sentence: The original Dome Mine (Tisdale Township) was discovered by jack wilson of the harry preston crew in 1909 was still operating as of April 2016, its life is slowly coming to an end this year as the ore is dwindling and quickly becoming exhausted.
Split into simpler sentences: The original Dome Mine (Tisdale Township) was discovered by Jack Wilson of the Harry Preston crew in 1909, was still operating as of April 2016. It's life is slowly coming to an end this year as the ore is dwindling and quickly becoming exhausted.