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Our contention is that the federal government has responsibility to the Upper Mississippi and Minnesota waters to battle invasive carp.

You can hide from the world under an electric blanket and wait until the weather cheers up, or you can embrace the cold and go out to see all the art and nature and beauty there is to see.

Get on a boat on the upper Mississippi River, and you'll eventually come upon a looming concrete structure stretching across the river's main channel. Locks and dams are a distinct feature of the upper river. But what are they for? And who controls them?

The construction of locks and dams, a major feat of engineering that occurred largely during the Great Depression, has transformed how the Mississippi River runs.

Prior to the installment of the locks and dams, the river was sometimes so shallow that people could wade across it.