Re: Drought dries up stretch of Platte River
Drought sends Mississippi into 'uncharted territory'
By John Yang, NBC News
TUNICA, Miss. – The drought of 2012 has humbled the mighty Mississippi River.
A year after near-historic flooding,
the river’s water levels are at near-historic lows from Cairo, Ill., where the Ohio River empties into it, to New Orleans, just north of its endpoint at the Gulf of Mexico.
In July,
water levels in Cairo, Memphis, Tenn., and Vicksburg, Miss., dipped below those of the historic drought of 1988. That’s affecting everything from commerce on the maritime superhighway to recreation to the
drinking water in Louisiana.
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The low water levels mean that
barge companies have to lighten their load by about 25 percent so the barges ride higher in the water, reducing what’s known as the barges’ “draught.”
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Already this summer,
there are been 15 to 20 cases of barges running aground, according to Steve Jones, the Army Corps of Engineer’s Mississippi River navigation manager. Some cases have
stalled river traffic for as much at three days. At this point in an average summer, there’d be only about eight or 10, Jones said.
And as the water drops, the river channel narrows. In some places,
the Mississippi is a one-way river as barges heading north have to wait for traffic headed south, adding to the costly delays.
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The navigational hazards of the low water levels are compounded by last year’s flooding, which resulted in a great deal of soil and silt being washed into the river, altering and raising the riverbed.
Because of that sediment in a flood, “as the ceiling rises, so does the floor,” said Golding. “We’ve just dealt with a historic flood, then the water drops.… We have some 50-year guys who’ve never seen anything like this before.
It’s a completely different river than anybody’s ever seen.”
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The low water levels in the Mississippi are also resulting in
a wedge of salt water creeping upriver from the Gulf of Mexico, threatening the drinking water supply in New Orleans. The Army Corps of Engineers hopes to begin work this week on a
$5.8 million underwater barrier to block the saltwater’s advancesnip
Read more here:
http://usnews.nbcnews.com/_news/2012/08/15/13295072-drought-sends-mississippi-into-uncharted-territory?lite