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Comment Moisture inside the dam wall (Score 2, Informative) 168

I believe the biggest problem with cracked dam walls is that moisture gets into the interior of the wall and softens the material which is keeping it strong. Then the crack opens a little bit more, more water gets in and you have a nice exponential curve happening.

There was a rumour about this happening to the hume reservoir in Australia about 20 years ago.

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