Big Thompson Flood

This coming Sunday marks the 35th anniversary of one of Colorado’s greatest natural disasters, the Big Thompson Flood. On the evening of July 31, 1976, heavy rains caused flooding to erupt in the Big Thompson Canyon, eventually resulting in the deaths of 139 people and causing $35.5 million in damage. If you’re interested in finding out more about this terrible event, we have a number of publications in our library that can help you, including:

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