Its becoming obvious, at least to me, that the auxiliary gates are probably useless. They have nowhere to run the water too, and wouldn't have unless the abnormal rain was confined to the Table Rock and Beaver watersheds. Raising the dam, which I understand was the other option, and increasing the flood pool would have given them some options.
It seems that their backs are to the wall now, and if this isn't the 500 year flood, well?????