The Vajont Disaster
The Vajont disaster confronts engineers with the danger of defining a project’s safety too narrowly. On October 9, 1963, a massive landslide fell from Monte Toc into the reservoir behind Italy’s Vajont Dam. The dam itself remained largely intact, but the displaced water surged over its crest and destroyed communities in the valley below, killing approximately 2,000 people. Geological instability, smaller landslides, ground movement, and concerns from residents and specialists had been observed before the disaster. Engineers attempted to manage the danger by controlling the reservoir level, but they underestimated the size and speed of the eventual landslide. The central ethical question is whether a technically strong dam can be called safe when the surrounding landscape creates an unacceptable risk. This case emphasizes respect for geological evidence, attention to dissenting experts and residents, and the obligation to consider the entire environmental system surrounding an engineered structure