I'm looking for any mine accident information on my great-grandfather, Joseph Hundzienski (DOB c. 1885 Poland). He lived in Canonsburg, Washington County, PA from about 1915 until his death in 1963. His WWII draft card lists his employer as "Chartiers Gas Coal Co. - Magnolia Mine." I know he lost a leg in a mine accident but I have no idea when, or in what mine. Any information would be much appreciated.