79 of 109 victims of the explosion at Mammoth Mine #1 on Jan. 27, 1891 are buried here in a mass grave. PA. Labor History Society 2000
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BillionGraves.com record for Mass Grave MAMMOTH MINE EXPLOSION (27 January 1891), BillionGraves Record Saint John the Baptist Roman Catholic Cemetery (Old), Scottdale, Westmoreland, Pennsylvania, United States, North America