Carbondale, PA tried flooding and other techniques for the time (1950's), but ultimately the only way to extinguish it was by digging it out. It took about 10 y

Carbondale, PA tried flooding and other techniques for the time (1950's), but ultimately the only way to extinguish it was by digging it out. It took about 10 years and it is estimated more earth than the Panama Canal was moved for the dig. It came within 20 feet of expanding into the core of the city and leading to what happened in Centrailia. https://en.wikipedia.org/wiki/Carbondale_mine_fire https://en.wikipedia.org/wiki/Carbondale_mine_fire