 by this and will need to be replaced. The bridge piers are constructed on top of sandstone bedrock, and effectively the bridge pier piling aren't driven down into the bedrock, they're just driven down so that the ends are sitting on top of the bedrock, and all of the lateral stability for the piling was achieved through the sediment that was in place that had been impounded in the river basin over the life of the dam. So as we're seeing dramatic levels of...