Originally Posted by Sunil
This is the third pic from the second set of pictures:

[Linked Image]

That photo looks like a collapse into a void space.

I also agree with RAH, about the view looking a little more worrisome! Assuming your core trench was constructed about the mid-line of the dam, then it looks like part of your collapse feature includes a section of the core trench!

I am not a dam construction expert, but your situation is starting to look like a recipe for disaster.