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Posted on 08/30/2005 1:34:04 PM PDT by NautiNurse
The rushing water tore 4 to 6 feet into the embankment, then cascaded the remaining 10 to 15 feet to the street, said Jeffrey Jensen, flood control program manager for the corps at its Washington headquarters.
Engineers hope the water gushing through the levee will slow or stop once the water in Lake Pontchartrain recedes to pre-storm levels and below the level of the breach.
"It's not subsiding as much as we'd hoped," Jensen said.
The Corps' plan to dump rocks or containers of sand into the gap from the air is a variation on what Stockton described as the standard procedure for mending a levee.
"You typically go in and start dumping large rocks or boulders to slow the flow of water down, which will slow the amount of erosion taking place," he said.
Smaller rocks, gravel and sand can then be poured in to seal the break. Sometimes a temporary ring levee is built outside the breach, often on higher ground where access is easier and the water flow slower.
Access to a levee break can be a problem. Some levees are designed to support truck traffic, but not this one. Barges are better if they can be moved close enough without being drawn into the gap.
"We're working on whether we can get a barge up there," Hecker said. "That's difficult due to the relatively narrow width of the canal."
Once the leak is plugged, the corps will turn to pumping.
The city's 22 drainage pumps can't do it fast enough on their own, so the Corps is prepared to bring in high-volume portable pumps to assist if the Federal Emergency Management Agency calls for them.
It would take "days or weeks" to drain the floodwater to a point where the city's pumping stations could operate again, Stockton said. Some pockets of water could remain for months.
In the meantime, tens of thousands of homes and businesses are steeping in seawater, sewage and other waste. ...............***
I can't find any control structure. Maybe the lake just does it own thing.
A couple of quotes I found on other posts sum it up well:
"The 'Big Easy' is now the 'Big Nasty.' "
... It's like The Day After Tomorrow, Dawn of the Dead, and Escape From L.A. all rolled into one...
You're probably right. I couldn't find the "dam" either.
Sorry
This area by nature drains very, very slowly. I don't know that blowing the bulkhead would speed up the process that much faster but it would definitely lead to more disaster later on when storm surges could enter the lake unimpeded over a wider swath than they can now.
http://pubs.usgs.gov/of/2002/of02-206/geology/sepontchartrain.html
It would be easy to fix after it's removed and the levels equalize. Good find. I'll study it some more.
I assume black line is concrete or steel?
Cincy, despite all the bad news, I have faith in America, and Americans-- we'll sort this stuff out, and deal with it.
We take care of our own.
Ok, what's taking so long?
Looks to me like it still could widened quickly and repaired later.
Just wondering: Has Jim Cantore from TWC been heard from?
GULFPORT , Miss - Elvin Duckworth, left, Jonathan Harvey, center, and Leonard Harvey paddle a row boat through a flooded street.
MOSS POINT, Miss Residents make their way to safety through flood waters that swept through low lying areas.
For information about what roads are passable in Louisiana, you can call the State Police Road Closure Hot Line at 1-800-469-4828 or click on ww.ohsep.louisiana.gov/ evacinfo/rdclosureindex.htm.
To find out about conditions in your home parish, you can find a listing of homeland security and emergency preparedness offices and telephone numbers at www.ohsep.louisiana.gov/Parish/parishoepnumbers.htm.
My husband thinks the scale is at the wrong place and the minus 10 should be 0. We really don't know
The Mississippi doesn't have dams exactly. Its normal direction of flow would not be what it is if there had not been active projects to keep it from changing its flow which it has done at times. If the Miss had been left to its devices and nature, it would be exiting into the gulf at Morgan City {or at least that is what I was taught}. Left to nature and no levees the miss would periodically flood miles around with rich soil.
But I think the current NO situation is not due to the Mississippi unless we are not being told.
But the short answer is the Miss is flowing now as it has done,,,the spillways are for overflow if the Miss threatens to flood via levee breakage. They were used sometime in the last 10 or 12 years,,we all drove down to see the spillway opened and it was impressive.
Can someone post a good live stream link for Katrina coverage? I'm cubicle bound today. I keep looking for the links from the first page of the threads but nothing is showing up.
Thanks
WWL-TV: http://www.khou.com/perl/common/video/wmPlayer.pl?title=beloint_khou&props=livenoad
WDSU-TV: http://mfile.akamai.com/12912/live/reflector:38843.asx
WPMI-TV: http://www.wpmi.com/mediacenter/default.aspx?videoId=113739
WKRG-TV: mms://wmbcast.mgeneral.speedera.net/wmbcast.mgeneral/wmbcast_mgeneral_aug262005_1435_95518
WTOK-TV (follow the link on the home page): http://www.wtok.com/
WJTV-TV: mms://wmbcast.mgeneral.speedera.net/wmbcast.mgeneral/wmbcast_mgeneral_aug262005_1435_95563
Gulf Coast Storm Network (radio): http://www.stormalert.net/main.html#
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