The Progress Clearfield Pennsylvania April 4, 1976 Pennsylvania People By Robert Glass Associated Press Writer Questions and Answers Q. What's the worst mining disaster that ever occurred in Pennsylvania? A. It was in Jacob's Creek in Northeastern Fayette County when 239 miners were killed in an explosion Dec. 19, 1907. The tragedy followed by only 13 days the worst mining disaster in U. S. history when 361 men died in a Monongah, W. Va., mine. cheryl BALOG wenberg