The St. Francis Dam ruptured five days after cracks were noticed, killing about 450 people and destroying entire towns.
Sources
- The Worst: Stupid Engineering Mistakes (wired.com)
- https://waterandpower.org/museum/St.%20Francis%20Dam%20Disaster.html (waterandpower.org)
- http://www.genealogytrails.com/cal/la/disasterstfrancis.html (genealogytrails.com)
- https://www.nbclosangeles.com/news/local/1928-santa-clarita-california-st-francis-dam-disaster-collapse-william-mulholland/165453/ (nbclosangeles.com)
- https://stfrancisdammemorial.org/wp-content/uploads/2020/08/St_Francis_Dam_for_ASCE_Press3020-compressed.pdf (stfrancisdammemorial.org)