The Darr Mine disaster at Van Meter, Rostraver Township, Westmoreland County, Pennsylvania, near Smithton, killed 239 men and boys on December 19, 1907. It ranks as the worst coal mining disaster in Pennsylvanian history. Many victims were of immigrants from central Europe, including Rusyns, Hungarians (including Slovaks from Gemer and Abov - then part of Austria-Hungary), Austrians, Germans, Poles and Italians.An inquiry carried out after the disaster determined that the blast was the result of miners carrying open lamps in an area cordoned off the previous day by the fire boss. The mine’s owner, the Pittsburgh Coal Company was not held responsible but abandoned the use of open lamps after the disaster.

The Darr Mine blast was the third major mine disaster in December 1907 (which would become the deadliest mine fatality month in US history); it followed Yolande mine in Alabama explosion on December 16, the Monongah Mining disaster in West Virginia on December 6 that killed 362 miners and the Naomi Mine explosion on December 1 that killed 34 people in Fayette City, Pennsylvania.