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Coffee Shop
Worlds largest storm water pumping plant
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<blockquote data-quote="greybeard" data-source="post: 1015223" data-attributes="member: 18945"><p>Yes, they are free flowing--gravity is a wonderful thing and the best part is it is everywhere. According to USCOE, in what they call the Project Flood or Design Flood, St Francis River and it's floodway will put 80,000 cu ft per second into the Mississippi R. Design flood is the most severe flood USCOE hydrologists can imagine within reason--a 1000 year type event. Old River can divert 620,000 CFS, Morganza relieves 600,000 cfs, and Bonnet Carre can run 1/4 million cfs with all it's timbers pulled. </p><p></p><p><img src="http://imageshack.us/a/img811/9481/designflood.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>All this, for USCOE to meet the congressional mandate that the Miss River flow forever to be maintained at a ratio of 70% flow to the Atchafalya getting only 30%---------regardless of Miss. river flood stage. </p><p>I wrote a lengthy article a few years ago about what would happen if Old River failed. It would be catastrophic, a disaster far worse than Hurricane Katrina and it would be irreversible. If Old Rver fails (washed away), the Miss R. will alter it's course down the Atchafalya basin and river channel and Miss River as far North as Baton Rouge will become brackish and soon begin to fill in since there will be no spring flood flow to help keep it scoured out. Someday when I have time, I will paste that over here to CT in another thread.</p><p></p><p>I assume the anti reverse thingies are to prevent water flow thru the pumps from turning the engines backwards in cases of high water levels on the output side. I can see how that would burn up an engine pretty quick. Some FM engines tho, will run in reverse by design--worked on an old tug that had 2 engines like that. To get reverse, the engine is shut down, a big lever is moved that shifts the cam shaft to a different set of lobes, a reverse rotation starter on the other side of the flywheel housing is engaged, and if all went well, the tug would be in "astern". It was nerve wracking to get it all done in a hurry and we hit the pier on several occasions when the engines didn't want to re-start.</p></blockquote><p></p>
[QUOTE="greybeard, post: 1015223, member: 18945"] Yes, they are free flowing--gravity is a wonderful thing and the best part is it is everywhere. According to USCOE, in what they call the Project Flood or Design Flood, St Francis River and it's floodway will put 80,000 cu ft per second into the Mississippi R. Design flood is the most severe flood USCOE hydrologists can imagine within reason--a 1000 year type event. Old River can divert 620,000 CFS, Morganza relieves 600,000 cfs, and Bonnet Carre can run 1/4 million cfs with all it's timbers pulled. [img]http://imageshack.us/a/img811/9481/designflood.jpg[/img] All this, for USCOE to meet the congressional mandate that the Miss River flow forever to be maintained at a ratio of 70% flow to the Atchafalya getting only 30%---------regardless of Miss. river flood stage. I wrote a lengthy article a few years ago about what would happen if Old River failed. It would be catastrophic, a disaster far worse than Hurricane Katrina and it would be irreversible. If Old Rver fails (washed away), the Miss R. will alter it's course down the Atchafalya basin and river channel and Miss River as far North as Baton Rouge will become brackish and soon begin to fill in since there will be no spring flood flow to help keep it scoured out. Someday when I have time, I will paste that over here to CT in another thread. I assume the anti reverse thingies are to prevent water flow thru the pumps from turning the engines backwards in cases of high water levels on the output side. I can see how that would burn up an engine pretty quick. Some FM engines tho, will run in reverse by design--worked on an old tug that had 2 engines like that. To get reverse, the engine is shut down, a big lever is moved that shifts the cam shaft to a different set of lobes, a reverse rotation starter on the other side of the flywheel housing is engaged, and if all went well, the tug would be in "astern". It was nerve wracking to get it all done in a hurry and we hit the pier on several occasions when the engines didn't want to re-start. [/QUOTE]
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