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. It's called a lock and dam, and it's a distinct ...
LA CRESCENT, Minn. — Late spring snow lingered on bluffs next to the Mississippi River as a tug from Little Rock, Arkansas, slowly crept northward, pushing a dozen empty barges. Sitting high out of ...
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