19 December 1907 239 workers died in the Darr Mine Disaster, the worst coal mining disaster in Pennsylvanian history.

THE BALLAD OF DARR MINE  -  Jason Hegedus     https://www.youtube.com/watch?v=0VfjYUklxW4
Monument to the Darr Mine Disaster    https://en.wikipedia.org/wiki/File:Darr_Mine_Disaster_Memorial.jpg
Darr Mine disaster from Wikipedia https://en.wikipedia.org/wiki/Darr_Mine_disaster