What The Heck Are These Things?

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Old 06-10-11, 12:43 PM
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What The Heck Are These Things?

I was looking at the Missouri River near Nebraska City and found these things protruding into the river. They must be man made, they're all pretty close to a tenth of a mile apart. Also, they tend to be on the inside of a curve....first one side then the other.





Read today the river will be at maximum flow within days and won't return to normal till sometime in September! What a mess that will be.
 
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Old 06-10-11, 12:56 PM
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Old 06-10-11, 02:54 PM
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I don't live anywhere near there...but you can find this easily using google.



Wing dikes:

These are rock structures built into the river by the US Army Corps of Engineers. They force the water away from the banks, narrowing the channel and speeding up the river. They are almost always found on the opposite side of the navigation channel. The water directly downstream of a wing dike is calm and is often a place where sandbars build up. These can be a good place to catch a nap or answer nature’s call. Also, behind a wing dike is a good safe spot to go if a towboat creates a rough wake. The water behind the dike will remain calm and safe.

However, you will want to be careful to avoid hitting a wing dike while going downstream. The current pushing against it can pin your boat and capsize it. It is not difficult to avoid a wing dike. At night or in foggy conditions, take extra precautions.

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BISMARCK, N.D. — Now that earthen dikes have been mostly built to protect Bismarck and Mandan from the Missouri River, authorities have a new problem with people climbing on them.
Bismarck Police Chief Keith Witt says a number of warnings have been issued to dike climbers.
He said Friday that police will start arresting people who climb on the huge dikes. Engineers say climbers can damage a levee and make it more likely to fail.
Witt says the penalty for dike climbing is a maximum of 30 days in jail and a $1,000 fine.
North Dakota National Guard commander David Sprynczynatyk (SPRIN'-suh-NAH'-tik) says about 15 miles of levees have been built to protect Bismarck and Mandan from Missouri River flooding.

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Here's a good closeup.

Wing dikes | Flickr - Photo Sharing!
 
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Old 06-11-11, 10:25 AM
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I've never seen nor heard of such a thing.

Thanks
 
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Old 06-11-11, 01:51 PM
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Looks similar to rock jetties on the beaches.
 
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