[82lsju]

Of course, explosives placed in the dam could start that process as well. The ultimate in bad maintenance. Blowing up solid concrete dam from the outside is relatively hard. Blowing it up from the inside in places you can let lots of water under very high pressure in is lots easier.

see a fictionalized version of this in "Force 10 From Navarone"

[82lsju]

Of course, explosives placed in the dam could start that process as well. The ultimate in bad maintenance. Blowing up solid concrete dam from the outside is relatively hard. Blowing it up from the inside in places you can let lots of water under very high pressure in is lots easier.

see a fictionalized version of this in "Force 10 From Navarone"