Here's a couple of larger photos of the dam:
http://www.irn.org/img/brazil_dams/campos_aerial1.jpg
http://www.irn.org/img/brazil_dams/campos_aerial2.jpg
Nice pics.
I'd bet that they did not let the cement cure. You can't just fill up the forms and say, "That's it." It takes many, many pours, in stages and phases to get the cement to cure properly.
Looks like they start over....poor engineering or corruption in the building contractor.
That's probably the safest vantage point at this stage of the game.
Gonna take more than Band-Aid's and super-glue to fix that!
Looks like a do-over, as in do it over from the beginning.