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re: Louisiana gets final funds for massive $3 billion Mid-Barataria Sediment Diversion
Posted on 3/9/23 at 3:34 pm to Hobie101
Posted on 3/9/23 at 3:34 pm to Hobie101
quote:
You are suggesting that the only benefit is land building. The diversions will also provide nutrients in addition to sediment that Barataria is starving for.
I’m not suggesting it…the State is stating it as the Purpose and Need for the project. I’m all for diversions … but also for transparency and honesty
0
Posted on 3/9/23 at 3:58 pm to Tarps99
quote:
One idea I thought of is to utilize Lake des Allemands and the interconnecting waterways to allow freshwater down the basin. Water control strutures could be used to maintain a boundry of fresh water along a natural ridge east of Galliano. That could help move freshwater west through the intracoastal and into Timbalier Bay, along with all the other fresh water that comes from the Atchfaylaya.
That is almost 100% pointless. That would be a freshwater diversion. It carries a negligible amount of sediment. A lot of you are missing the fact that a freshwater diversion is not a sediment diversion. In isolated cases, they CAN build land, but that is not their intention. And the only thing a sediment diversion would do there, is fill in Lake Des Allemands after a couple lifetimes.
Posted on 3/9/23 at 4:03 pm to Antib551
Starving/subsiding marsh < freshwater diversion < sediment diversion
Posted on 3/9/23 at 6:54 pm to Marshhen
quote:
But you can dredge for $40K/acre.
Maybe 10 years ago when the project was right next to the borrow source. Have you studied what dredging bids have been coming in at the last 2 years? They’re almost 50% higher. It’s not an exaggeration. While I admit that plus increasing distances still has you less than $200k/acre, the other fact of life pro-dredge people commonly omit is that there aren’t enough dredges in the US fleet, even if we could have all of them here all the time. Even with a Callan, Great Lakes, Weeks expanding their fleets, there aren’t enough to dig us out of the problem. It’s an all hands on deck solution we need. If we can get substantial amounts of sand out the river even at a higher price, we must.
Posted on 3/9/23 at 7:08 pm to man in the stadium
Dredging is pointless if you can’t nourish the lands you create. Sure you pump sediment into the system, but it will eventually migrate down the beach.
Davis pond was intended to be a freshwater diversion and it quickly built land before being modified due to design flaws. First major flood event once this thing is in operation and there should be some appreciable results.
Davis pond was intended to be a freshwater diversion and it quickly built land before being modified due to design flaws. First major flood event once this thing is in operation and there should be some appreciable results.
Posted on 3/9/23 at 7:15 pm to dewster
Politicians and their friends are all smiling right about now!
Posted on 3/9/23 at 8:09 pm to lowhound
So this STUPID little 3 bil canal will take 50 yrs to deposit soil to make a little 3 sq mile delta.
By that time that whole fricking area is gonna be gone, probably even Grand Isle.
But the delta will be a good duck roost !
By that time that whole fricking area is gonna be gone, probably even Grand Isle.
But the delta will be a good duck roost !
Posted on 3/9/23 at 8:18 pm to Capt ST
I am agreeing with you
Posted on 3/9/23 at 10:22 pm to dewster
This is the biggest waste of tax payer money in the hostory of the CPRA!
Will take 50 yrs to do what dredging does in months!
Will take 50 yrs to do what dredging does in months!
Posted on 3/9/23 at 11:09 pm to GumboPot
And the rest of the estuary has washed away by 2070 when that liver splotch of land appears. 
Louisiana is and has been washing away. It will never experience significant erosion and settlement reversal. Harsh but true.
Louisiana is and has been washing away. It will never experience significant erosion and settlement reversal. Harsh but true.
Posted on 3/10/23 at 1:32 am to Capt ST
quote:
Dredging is pointless if you can’t nourish the lands you create. Sure you pump sediment into the system, but it will eventually migrate down the beach.
Posted on 3/10/23 at 6:17 am to GumboPot
quote:
People and oysters will just have to adjust, and they will.
Yep. They'll have to harvest oysters where they did 50-100 years ago when the current beds were dry land.
Posted on 3/10/23 at 6:30 am to Bigfishchoupique
Blow the levees south of BC it will, which is the only real answer. That or do about 10 more of these. Which we could do and still not spend the money they have laundered through Ukraine just this year.
Posted on 3/10/23 at 7:32 am to GREENHEAD22
Serious question.... Would not just one direct hit by a hurricane wipe the gains out or severely set this back once implemented and working?
Posted on 3/10/23 at 7:33 am to man in the stadium
quote:
Maybe 10 years ago when the project was right next to the borrow source. Have you studied what dredging bids have been coming in at the last 2 years? They’re almost 50% higher
I am quite familiar with dredge costs. The cost to dredge would be closer to $10K/acre if allowed to freely discharge in the marsh like the diversion does.
Also, there are plenty enough of dredges in the fleet and if more capacity is needed they would build more. The head of CPRA stated in 2020 that over from 2018-2020 the State built more land than lost. There were no diversions in place at that time. How did that happen?
Again, I’m not anti-diversion but it’s disingenuous to say that the diversion will be some kind of silver bullet to “save the coast”.
Posted on 3/10/23 at 8:07 am to GhostofLesticleMiles
quote:
Serious question.... Would not just one direct hit by a hurricane wipe the gains out or severely set this back once implemented and working?
From what I have seen after Hurricane Ida, some marsh grass beds float. Some of them floated and filled in a canal that crosses LA 24. In Larose. They recently dug out the canal to open it back up for small boats to transverse.
This project will work deeper under the water at first before getting shallower and building land see the Wax Lake and Atchafalaya deltas. With as many hurricanes that have impacted that area. I don’t think much if any land has been lost.
This post was edited on 3/10/23 at 9:23 am
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