Gov’t: Erosion is “undermining foundation” of major dam upstream of US nuclear plants | WHAT REALLY HAPPENED

Gov’t: Erosion is “undermining foundation” of major dam upstream of US nuclear plants

The location of this sinkhole and the presence of the sediment… really raised the possibility of a safety concern with the dam… The initial investigation showed that we had internal erosion. A phenomenon called ‘piping’ where voids from water flowing through the dam — more of a stream-like effect — than just seepage. Internal erosion is one of the leading causes of dam failures around the world. So we knew that we had to do something here to protect the safety of the public… particularly downstream risk… Around the clock inspectors [are] keeping surveillance on the dam [and we have] sensors to monitor movements that might occur in the dam itself.

4:00 — One of the key findings so far is that water is flowing through the foundation from multiple sources, and in multiple directions. It’s actually seeping through porous rock — rainwater upstream, through porous rock, through the dam…

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