re: nevermind

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Auxilliary is irrelevant if Low Sill fails.

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I bet they could dam the low sill channel and continue using auxiliary until they could rebuild or replace low sill.


I thought I remember that they built Aux to be able to replace low sill but they were able to salvage it so they ended up using them in conjunction.

(no message)

Well that is obvious. The Auxillary was built so the 30% flow required by law to flow to the Atchafalaya River wouldn’t have to go through one structure. It was not the concrete part of the structure in 1973 that was about to fail. It was the wing dams and the ground beneath the concrete structure being eroded from scouring because so much water was trying to get through the structure. My dad worked for the levee board in Concordia Parish in 1973 and saw them dump riprap(boulders) the size of houses on the river side of the structure and could see them tumbling with the flow on the other side of the structure. It came extremely close to failing in 1973.

Clive Cussler's fourth Dirk Pitt novel is about an evil Chinaman attempting to blow the levee and make Morgan City a deepwater port.

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I’m not disputing what would happen if the river shifted course, but this report is from 1980. 6 years before the Auxillary Control Structure came on line plus the Hydroelectric Plant a few years after that. They both relieve pressure on the Old River Control Structure.

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I only read up to the end of Part IV last night, but they reference the Auxiliary structure in their report. In the synopsis at the beginning of the paper they mention the importance of the Auxillary Structure being completed and include in their "Flood of 198x" doomsday scenario.

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Explain this to me.

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I can’t recall which part we were in, but the structure has a shaft (for lack of a better way to describe) with access to the bottom via an elevator. There was mechanical equipment, etc. It was pretty large. It was a long time ago, so details are fuzzy.

Water follows the path of least resistance. Miss R. would once again change its delta and flow down the Atchafalaya River. All ports from BR to the mouth would no longer be able to handle ocean going vessels.

Right. Salt water intrusion fricking up process and cooling water in all the plants and contaminating drinking water is the much bigger problem.

I agree about the saltwater intrusion, but not the idea that the ports would be unaffected. Reduced water flow means that the suspended sediments would settle that much faster. I've seen too many engineers scream "That's theoretically impossible!" when their views get ruined because they were too myopic to take into consideration that shite happens that you never planned for.