A river in Pennsylvania; also a geological formation and geological epoch from the Carboniferous period named after the river.
From the Lenape Native American word 'Conemogon' or similar indigenous terms, meaning roughly 'large stream' or relating to the river valley, adopted by early English colonists.
The Conemaugh River is infamous for the 1889 Johnstown Flood, where a dam failure released 20 million tons of water that killed 2,209 people—making it one of America's worst industrial disasters.
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