Officials consider fish passageway at Lock and dam in Red Wing
Since the construction of U.S. Lock & Dam No. 3 near Red Wing, only the strongest fish have been able to force their way past the dam's gates.
A U.S. Army Corps of Engineers plan, however, proposes a first-of-its kind project for the upper Mississippi River: a passageway for other fish to swim upriver.
That includes several endangered fish species, said Dan Wilcox, a Corps fisheries biologist.