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Started By
Message
1
Posted on 7/17/19 at 2:46 pm to OvertheDwayneBowe
quote:
I don't think anything gravity feeds into the outfall canals.
Everything has to go through one of the SWBs pumps to get there.
I realize that....
quote:
So if there's no risk of storm surge, there's no reason for the gates to be closed.
If the gates are open, and the spillway is open the Lake level rises therefor the outfall canal rises lessening the about of room the SWB has to pump out the city water.
If the gates were closed and the level of the outfall canal lowered the city could pump into the outfall canal then the the pumps at the mouth of the outfall canal could pump out the canal......that is what the gate and pumps are there for
Posted on 7/17/19 at 2:50 pm to OvertheDwayneBowe
quote:
I don't think anything gravity feeds into the outfall canals.
Everything has to go through one of the SWBs pumps to get there.
So if there's no risk of storm surge, there's no reason for the gates to be closed.
Exactly. There is a specific water level (approx. 4 ft. from the top of the outfall t-walls) that triggers the closure of the bypass gates at the new stations on the outfall canals. At this point, for reference, you cannot drive Lakeshore Dr. Water would be over your knees. Didn't happen for Barry.
Opening of the spillway doesn't appreciably raise the lake level. Gotta remember, the rest of the earth's seas are open to us through the Rigolets.
This post was edited on 7/17/19 at 2:52 pm
Posted on 7/17/19 at 2:52 pm to TSmith
no one said anything about gravity feeding into the outfall canals.....read my previous post
Posted on 7/17/19 at 2:54 pm to tgrbaitn08
quote:
no one said anything about gravity feeding into the outfall canals.....read my previous post
Better way to think of it: there is so much shite in the canal that the water level at the lake is several feet lower than the water level at the SWBNO pump station.
Remember, this could be the result of deferred dredging. Might not simply be garbage, although the SWBNO tried to blame it on a trampoline this morning. They should know better than to do that.
This post was edited on 7/17/19 at 2:56 pm
Posted on 7/17/19 at 2:55 pm to TSmith
quote:
Opening of the spillway doesn't appreciably raise the lake level. Gotta remember, the rest of the earth's seas are open to us through the Rigolets.
Understood, but do you think the 17th Canal's level could have been high enough to restrict the flow entering the canal from the city last week., and if the gates were closed and the pumps at the mouth of the outfall canals were on it would have limited the over topping of the canals in the city?
Posted on 7/17/19 at 2:57 pm to teke184
quote:
not that they don’t know the problems or have the solutions laid out at this point. It is that no one has the will to push them through and figure out the costs involved.
There is at least one study from 2012 which pushed hard to move away from the old 25hz turbines and the pumps they power to using modern 60hz power which is a lot easier to generate and won’t end up with turbines down for long periods of time due to maintenance issues.
All this shite won’t get fixed at once but it would kind of help if the SWB would actually start implementing a solution instead of sleeping on the job or sitting around playing butt darts while the city floods.
Part of that problem is terrible management of funds. Without the recent tax restructuring there were comments of bankruptcy of sectors in their umbrella even with substantial loan forgiveness projected for them. It’s a train wreck and no one seems to have a plan. Which makes me all the more nervous about sending them more tax dollars
Posted on 7/17/19 at 2:58 pm to TSmith
quote:
Better way to think of it: there is so much shite in the canal that the water level at the lake is several feet lower than the water level at the SWBNO pump station.
gotcha...i guess that would me the level in the 17th Street Canal would also be lower than the level at the SWB pump station
quote:
although the SWBNO tried to blame it on a trampoline this morning. They should know better than to do that.
I saw that
Posted on 7/17/19 at 3:01 pm to tgrbaitn08
quote:
Understood, but do you think the 17th Canal's level could have been high enough to restrict the flow entering the canal from the city last week., and if the gates were closed and the pumps at the mouth of the outfall canals were on it would have limited the over topping of the canals in the city?
No, I believe that in the canal's current level of maintenance, it would not have made a difference.
Remember, studies showed that the t-walls on the 17th St. Canal, Orleans side failed during Katrina because of previous dredging on the the Orleans side that Jefferson Parish opted out of. So it is a bit of a catch-22, in that dredging was shown to be a cause of the wall failures. However, now that we have bypass gates, and PCCP, we need to dredge them as deep as required.
Posted on 7/17/19 at 3:37 pm to tgrbaitn08
My man 
Posted on 7/17/19 at 3:40 pm to TSmith
quote:link?
Remember, studies showed that the t-walls on the 17th St. Canal, Orleans side failed during Katrina because of previous dredging on the the Orleans side
Posted on 7/17/19 at 3:50 pm to jimbeam
quote:
link?
LINK
"The Orleans Levee District’s 1990 dredging plan for the 17th Street Canal called for a smooth 3:1 slope and a deeper canal bottom here at the site where the levee would fail in 2005. The permit called for even dredging on both sides, but Orleans went ahead without Jefferson’s participation."
This post was edited on 7/17/19 at 3:50 pm
Posted on 7/17/19 at 6:37 pm to TSmith
Interdasting
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