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June 30

posted Jun 30, 2014, 5:04 AM by vfe_ai_venice.beske@wyo.gov   [ updated Aug 18, 2015, 7:35 AM by Travis Pollok ]
1903 The greatest loss of life in any mine disaster in Wyoming occurred at Hanna on June 30, 1903, when 169 miners died when coal gas ignited in Mine No. 1.