Bayou LaFourche

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Does anyone think that the freshwater diversion proposal that comes up periodically would have helped any of this

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no, it would have been a negligible amount of water, but good for the marshes

I would love them to open Bayou Lafourche (no capitol "F" )

It would help reverse erosion immediately! but of course they wont do this

T-Nonc should built his warf just a little bit higher then

Got this email yesterday. Makes me really trust the ACOE.
"Hello All

I would like to address the Inundation Maps recently produced and released by the Corps, specifically as they impact areas in our district in the Raceland to Larose area.

I was a bit taken aback by the inundation maps that the Corps put out over the weekend. At first glance, it appeared to me that the Corps was unaware of the levees that we have in these areas. We have no federal levees in our District. On Monday, I contacted the Corps to try to schedule a meeting with the Hydrologist and the GIS folks who put the map together to find out exactly what they knew and did not know when they put the maps together. Before the end of the day, I had the meeting scheduled for 10:00 am Tuesday in New Orleans. Later in the day Monday, I was able to get the same maps in a different file format from GOHSEP which included an “abstract” indicating some of the assumptions that were made on that map.

I met with the Corps and found out they did exactly as I suspected.



1) They were unaware of the levees we have in some of the areas where they show having 1-5 or 5-10 feet of water over ground in the Raceland, Mathews, Lockport and Larose. They did not therefore include them in their analysis and mapping effort. We discussed the alignments of these levees and agreed to provide them with GIS information so that they could include this in future maps.



2) The basic hydraulic approach used to indicate water from the Atchafalaya River, heading along the GIWW to the Lafourche area was pretty standard and likely a good estimation of the water surface elevations we could potentially see in our area. Basically, they assumed a 5’ water surface elevation at the GIWW near Morgan City and sloped the water to the west (and east.) Going west along the GIWW, they assumed a 3’ elevation in Houma and they carried this 3’ water surface elevation to Larose.



3) Given the time that this high water level will be present, they extended this water level (again without any of our levees being considered) to the 3’ contour of surrounding land north and south.



4) They then subtracted LIDAR based ground elevations from this projected 3’ water surface elevation to project the depth of the water over ground. In mapping this, and purposely to prevent the maps from being too precise, they colored anything that indicated a 0-5’ water depth as one color, anything that had a 5-10’ water depth as another color and so on…. Again, this was done without any knowledge of our levees.



5) As such, what we are really looking at is the potential of having a sustained 3’ water surface elevation acting on all of our levees in the event of the 50% opening of the Morganza Spillway. Our levees have withstood this before. Levee elevations are typically higher than this 3’ potential water elevation. The two areas west of Mathews and Lockport are the Raceland prairie area where the ground elevations are below sea level; but, the areas are surrounded by ring levees that exceed 5’ elevation. So, they would not be flooded by a 3’ water elevation on the outside.



6) They indicated that the maps were not intended to be looked at that closely and were much more of a broad brush look. I showed them the newspaper articles. I said, the articles say the maps show potential of flooding 5-10 feet west of Mathews and Lockport. Indeed they do.

In conclusion, I believe it is imperative that the residents in the central Lafourche area should maintain their diligence and not let their guard down. However, based on the information beyond the maps, we are projected to see a potential of water elevations slowly rising to a 3’ elevation along the levee systems. We will have time to continue monitoring the situation and address any weaknesses as they develop. In areas outside the levee system (gravity drainage areas) we will see water backing up into areas that typically do not have water. But, I believe given the slow rate of the encroachment of this water, the Parish and the NLLD should be able to stay ahead of these issues with traditional flood fighting methods."

Yeah bruh, if they let loose more water, we gonna have a crawfishing party on that wharf.

I saw that they made lots there. How high is the ground from the bayou there? They have some big lots. I would definitely put a bulkhead along the bayouside. I have been keeping an eye out for you. I think I saw a for sale sign yesterday along hwy 1 around Dickie's place. I will check it out today.

Someone at work told me that the weir in Thibodaux was rolling! I may put out a few cages to see if there is anything biting. My wharf didn't go under water for any of the latest hurricanes so I think I would be safe for a lot more water.