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Started By
Message
re: Morganza Spillway may or may not open for a 3rd time -- lack of clear info from ACoE
Posted on 5/29/19 at 12:31 pm to Crawdaddy
Posted on 5/29/19 at 12:31 pm to Crawdaddy
For those of us that don’t know shite about this, what will this do for the river in Nola? And if it drops, how much and how quick is the estimate?
1
Posted on 5/29/19 at 12:32 pm to Crawdaddy
Dam fausse pointe can’t catch a break. Been flooded since 2016 it seems
Posted on 5/29/19 at 12:40 pm to More beer please
quote:
For those of us that don’t know shite about this, what will this do for the river in Nola? And if it drops, how much and how quick is the estimate?
Basically nothing.
Everything being done upriver in the spillways is designed to keep the flow rate through New Orleans under 1,250,000 cubic feet per second and through Baton Rouge under 1,500,000 cubic feet per second. They'll open more bays in Bonnet Carre and/or Morganza to keep the river under those thresholds.
Posted on 5/29/19 at 12:41 pm to slackster
Jesus are those inundation maps right? Does that show the edges of Belle River rising significantly on 6/24?
Posted on 5/29/19 at 12:43 pm to diat150
quote:
Can't imagine krotz springs flooding.
Not from this event. The levee protects the city to 43-45 feet, and the highest recorded stage of the Atchafalaya there was 38.5 feet in 1927.
That being said, when the water outside a levee is 10 feet higher than the elevation of the city inside it, it's always a bit scary. A levee could theoretically fail and you're toast.
Posted on 5/29/19 at 12:46 pm to CaptainJ47
quote:
Does that show the edges of Belle River rising significantly on 6/24?
I don't see a map for 6-24 but if you compare the 0 cfs map with the 150 kcfs maps, I don't see a whole lot of difference.
Posted on 5/29/19 at 12:51 pm to CaptainJ47
quote:
Jesus are those inundation maps right? Does that show the edges of Belle River rising significantly on 6/24?
It's important to note these are not levels above and beyond current water levels, they're simply the total inundation. The best way to see the impact from Morganza in the Assumption/St. Martin area is to click on the June 3rd map and then select the June 26th map. You see some increase in the light blue areas, but nothing outrageous. June 3rd inundation is basically the current inundation, and June 26th is the projected peak in that area.
ETA - For example, if you're already 10 feet under water today, you'll be bright purple from jump street. An extra foot of water, while possibly important to you, won't be visible on this map.
This post was edited on 5/29/19 at 12:55 pm
Posted on 5/29/19 at 1:03 pm to MountainTiger
quote:
I don't see a map for 6-24 but if you compare the 0 cfs map with the 150 kcfs maps, I don't see a whole lot of difference.
There are really 3 maps of relevance to Belle River, Stephensville, etc.
The 0k cfs map without the barge, which is dated 6/26 but I assume would be no different than the current situation pre-barge.
The 150k cfs map with the barge on 6/3, which is basically the effect of the barge without any water from Morganza in Morgan City yet. Notice the lower inundation in the Chacahoula Oil and Gas Fields from the immediate barge relief.
The 150k cfs map with the barge on 6/26, which brings the inundation levels in Chacahoula back to the pre-barge heights, but presumably not much higher. It also has higher inundation south of Morgan City than the current situation, which is to be expected.
Posted on 5/29/19 at 1:11 pm to CaptainJ47
quote:
Jesus are those inundation maps right? Does that show the edges of Belle River rising significantly on 6/24?
Not unless there’s a huge rain event.
The purpose of sinking the barge this weekend is to prevent the backwater flooding of lower St Martin, St Mary and Assumption
Posted on 5/29/19 at 1:17 pm to tgrbaitn08
quote:
Not unless there’s a huge rain event.
Well the models are all looking great for the next few weeks in that regard. Of course that could change but so far so good.
Posted on 5/29/19 at 1:25 pm to tgrbaitn08
The issue with the barge relates to future local rainfall. The barge will protect against back water flooding from the Atchafalaya, but will also impede drainage of water from the Lake Verret basin. If you get a lot of rain from White Castle, Donalsonville down through Assumption Parish on the west side of the Bayou, it all drains through there.Essentilly , south of the Mississippi River levee, west of Bayou Lafourche and east of the Intracostal/Spillway levee.
This post was edited on 5/29/19 at 1:28 pm
Posted on 5/29/19 at 1:26 pm to michael corleone
It will drain through Bayou Penchant
Posted on 5/29/19 at 1:53 pm to slackster
quote:
The 150k cfs map with the barge on 6/3, which is basically the effect of the barge without any water from Morganza in Morgan City yet. Notice the lower inundation in the Chacahoula Oil and Gas Fields from the immediate barge relief.
The 150k cfs map with the barge on 6/26, which brings the inundation levels in Chacahoula back to the pre-barge heights, but presumably not much higher. It also has higher inundation south of Morgan City than the current situation, which is to be expected.
Right, I meant specifically that I didn't see much difference along Belle River from Lake Verret to MC between the 0 cfs map and the 150 kcfs maps.
This post was edited on 5/29/19 at 1:58 pm
Posted on 5/29/19 at 2:05 pm to TigerstuckinMS
quote:
Don't let Coop's gammy swim.
How's Coop, by the way?
She was raised on the bayou, should be able to swim pretty well.
And Coop is doing great, thanks for asking.
Posted on 5/29/19 at 2:18 pm to slackster
That makes a hell of a lot more sense. I was interpreting the 6/24 as above and beyond today... phew! Granted yes a massive rain event hurts with the barge in place for sure.
Posted on 5/29/19 at 2:21 pm to CaptainJ47
quote:
I was interpreting the 6/24 as above and beyond today
Where are you seeing 6/24?
Posted on 5/29/19 at 2:44 pm to tgrbaitn08
quote:
We should have an OTGT at The Spillway Bar
I drove by yesterday and it looks like it’s turning into a coffee shop...
Posted on 5/29/19 at 2:44 pm to MountainTiger
There is a link on page 77
Posted on 5/29/19 at 2:58 pm to MountainTiger
quote:
Where are you seeing 6/24?
I think he means 6/26.
Posted on 5/29/19 at 3:19 pm to slackster
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