The tug Theresa L. Wood heads upstream after locking through Lock and Dam #8 in May in Genoa, Wis. The vessel was moving barges from St. Louis to Winona, Minn. The locks allow the boats to gradually ...
Ever seen a lock with a round key and thought what wizardry it is? That’s a tubular lock, although some folks call it an Ace, barrel, or circle pin tumbler lock. It’s the go-to gadget for vending ...
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 ...
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