Teton

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Photo used with permission from the Teton Dam Failure site.
The brown streak running down the river-right part of the dam is the harbinger of a failure to come. It took about an hour from the time this photo was taken until the dam was breached. Photo used with permission from the Teton Dam Failure site.
The works at the base of the dam are now flooded; the flow has taken on a violent character. Most observers must have known at this point that there would be no saving the new dam. Photo used with permission from the Teton Dam Failure site.
As the leak grew, it reached the crest of the dam. Photo used with permission from the Teton Dam Failure site.
Everything's flooded. Your tax dollars at work!

Photo used with permission from the Teton Dam Failure site.