There is a clear need to evaluate the geology of the surrounding area when planning a dam project, and the case study of the Vaiont Dam catastrophe of 1963 demonstrates this very well.
A good summary of the main points of the Vaiont landslide can be found on Dave Petley’s blog http://www.landslideblog.org/2008/12/vaiont-vajont-landslide-of-1963.html and a more developed treatment (by R. Genevois and P.R. Tecca) can be downloaded as a PDF file: Vaiont landslide state-of-the-art
Video documentary evidence about construction of the dam and the landslide event:
1. Construction of the dam: documentary in Italian: https://www.youtube.com/watch?v=qzKWcp4eRqI
2. “Fly-by” showing the sequence of the Vaiont valley landslide and flood: https://www.youtube.com/watch?v=6COeNRToYqU
3. Model dam fail: a school geography experiment showing a model dam saturated with water which finally fails. https://www.youtube.com/watch?v=bWEWVw7TGk4
4. Documentary with photographs of the disaster: https://www.youtube.com/watch?v=cp1it7mw_XU
5. Video showing the Vaiont Dam as it is today, and the memorial in Casso to the 2000 victims of this catastrophe. https://www.youtube.com/watch?v=FBV1yXDnvPQ
6. Dave Petley’s presentation at the Vaiont conference in Padua showing how common major landslides are when resulting from dam construction in mountainous areas.