Mulholland's Mistake

Catastrophe!

William Mulholland was an almost legendary figure in American engineering, with a career spanning 40-plus years. He was responsible for bringing water to the thirsty young metropolis of Los Angeles.

When he built his second concrete gravity dam, however, he overstepped his own knowledge. The collapse of the St. Francis Dam killed at least 411 people, with many still unidentified to this day. When the dam burst, nearly 12.5 billion gallons of water raced from the mountains above present-day Santa Clarita over 50 miles to the Pacific Ocean, destroying everything - and everyone - in the way.