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Comite river diversion canal project
Posted on 6/6/18 at 3:46 pm
Posted on 6/6/18 at 3:46 pm
LINK
Old link, but I'm reading about it for the first time. The way I understand it, the Comite will drain into the Mississippi. Wouldn't this have negative effects on the Maurepas swamp area?
Would it make sense for them to build it so it also acts as a throttled spillway during spring floods? Because it seems like the area already kind of suffers from limited water movement.
Of course, they would have to fix the Amite diversion canal first anyway.
ETA: when I say act as a spillway I mean water going from MS > Comite.
Old link, but I'm reading about it for the first time. The way I understand it, the Comite will drain into the Mississippi. Wouldn't this have negative effects on the Maurepas swamp area?
Would it make sense for them to build it so it also acts as a throttled spillway during spring floods? Because it seems like the area already kind of suffers from limited water movement.
Of course, they would have to fix the Amite diversion canal first anyway.
ETA: when I say act as a spillway I mean water going from MS > Comite.
This post was edited on 6/6/18 at 4:09 pm
5
Posted on 6/6/18 at 3:49 pm to F73ME
quote:
ouldn't this have negative effects on the Maurepas swamp area?
As you mentioned, it would be used in flood and high water events. In normal water level times, flow into Maurepas would remain as its been.
Posted on 6/6/18 at 4:04 pm to F73ME
quote:
Would it make sense for them to build it so it also acts as a throttled spillway during spring floods?
That's exactly how it's designed. The only part of the system that has actually been built is the Lilly Bayou Control Structure. It will only allow water to flow to the MR during substantial high water events.
Posted on 6/6/18 at 4:06 pm to Boudreaux35
What I meant is when the Mississippi is high during the spring, using it as a throttled spillway to push good flow down the Comite river. I think it could be used both ways, but it looks like they're just wanting to use it to drain into the Mississippi river.
This post was edited on 6/6/18 at 4:07 pm
Posted on 6/6/18 at 4:06 pm to F73ME
It will never be finished
Posted on 6/6/18 at 4:08 pm to wickowick
in time
Posted on 6/6/18 at 4:09 pm to F73ME
quote:
What I meant is when the Mississippi is high during the spring, using it as a throttled spillway to push good flow down the Comite river. I think it could be used both ways, but it looks like they're just wanting to use it to drain into the Mississippi river.
It's not designed for that at all and would require radical alterations to ever do so.
Posted on 6/6/18 at 4:15 pm to Jester
How would it have to be drastically different? I imagine it's a pumping station + check & gate valve into the river?
Just add a bypass line with a gate valve so it can be opened to go the other way.
Correct me if I'm understating the complexity.
Just add a bypass line with a gate valve so it can be opened to go the other way.
Correct me if I'm understating the complexity.
Posted on 6/6/18 at 4:26 pm to F73ME
quote:
How would it have to be drastically different? I imagine it's a pumping station + check & gate valve into the river?
Just add a bypass line with a gate valve so it can be opened to go the other way.
Correct me if I'm understating the complexity.
That's not it at all. It's basically a passive system that functions more like a weir.
The bonnet carre, on the other hand, is basically a really wide gate across a very low-lying area. When the river is high, the water would naturally flow to the lake there if not for the levee and structure. Opening the bonnet carre allows the high water to go where it wants to go.
The topography around Lilly Bayou and Bayou Baton Rouge is different. There is natural high ground there, which is why they don't have the levee like most parts of the delta. The water from the river isn't going to just flow uphill. If you can find a decent quad map or lidar map of northern EBR parish, you can see what I mean.
Posted on 6/6/18 at 4:29 pm to Jester
Gotcha, I assumed the bank next to the river would be higher than the surrounding area, like much of the rest of its historic floodplain. That makes sense, thanks.
Posted on 6/6/18 at 4:41 pm to wickowick
quote:
It will never be finished
I'm just waiting on everyone that's been paying taxes to fund it for decades gets their money back. lol.
Posted on 6/6/18 at 5:12 pm to F73ME
quote:
Wouldn't this have negative effects on the Maurepas swamp area?
you mean like levees and cutting flow from MS river did?
Posted on 6/6/18 at 8:05 pm to F73ME
It would make more sense to force developers away from these flood prone areas.
Posted on 6/6/18 at 8:29 pm to seeinspots
That would be using too much common sense.
Posted on 6/6/18 at 9:17 pm to F73ME
We don't ever want the Mississippi flowing into the Comite.
This post was edited on 6/7/18 at 8:12 pm
Posted on 6/6/18 at 11:14 pm to ecb
Many pipelines on east/west side of 61 hwy must bridged. They recently claimed they need millions to complete this and cause of completion failure. What a crock ! Who would ever develop one side without a plan to complete ? This if developed will draw very little off central anyway. The comite diversion if a serious joke. Marepaus dredged to mega depth to create retention will help much more. Gotta displace water with wind and tides and lower end water levels is only fixed with retention.
Posted on 6/7/18 at 8:47 am to fishbaja2
quote:
Marepaus dredged to mega depth to create retention will help much more. Gotta displace water with wind and tides and lower end water levels is only fixed with retention.
So you're saying if Lake Maurepas was deeper it would reduce flooding? That makes no sense. It's like those big arse lakes that were dug for development on Hwy 42 in Galvez. If a bowl is already full of water, and you add more water to it, it's going to overflow regardless, doesn't matter how deep it is for "retention". Now if the Amite, a channel across Maurepas, Ponchartrain, and Rigolettes was dredged, then I could understand. Deeper flowing water helps, not a deeper lake.
This post was edited on 6/7/18 at 8:48 am
Posted on 6/7/18 at 8:50 am to F73ME
quote:
How would it have to be drastically different? I imagine it's a pumping station + check & gate valve into the river?
Just add a bypass line with a gate valve so it can be opened to go the other way.
Correct me if I'm understating the complexity
The Comite is much higher elevation than the Mississippi. It's designed with several drop structures along the way to the river just to get the water down to the Mississippi from the high ground. Water wouldn't be able to go back up in reverse.
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