FoTigerapher

What size and type of pumps are they using?

The rest of them likely washed out. At 2600-3000 lbs each stacked side by side, thats about 36-40,000 Lbs every 20ft or so. A lot of weight on a little asphalt road on top of soggy ground.

No point in arguing about this now but if you do a bit of research you will find they have significantly more authority than just "major waterways".
Either way, my point was they are knowledgable of the systems of waterways and may have aided in getting valuable information out to the public. I have been involved in the dredging industry for many years, fwiw.

I hope there wasn't one. That's so unfourtunate when people use terms like "breach" when they mean "overtopping". A breach is representative of a failure... why the news stations dont interview the ACOE is beyond me. Unless i missed the interviews. Those guys should know the topography and the waterways better than most and could provide some valuable insight.

Just checked Bayou Manchac behind CCLA and is down a few inches from earlier today. The flowrate is still significant though. BF should drop if more water is flowing into Spanish Lake basin due to the breach. Dont know if that is good news or not from those on the otherside in Ascension and Iberville.

Damn...hoping that wouldnt happen. Lets hope it is a "small" breach...and doesnt expand too rapidly.

My hood has been very quiet past 20-30 mins so i guess they are done dropping the sandbags. It has been constant all morning. Anyone know if they actually evacuated the women's prison? Going to check the flow at Manchac before BF and AB in a few minutes.

What elevation are the plants? I hope they are plenty high enough. I expect if they dont evacuate the prisons down there, that their plan worked considering it is within the Spanish Lake basin north and east of 74 and 30

The Spanish Lake Swamp/basin is 17,000 acres, about 1/4 of which is above (towards BR) Alligator Bayou/Manchac/ Bayou Paul road. That upper area took a lot of the water from Bayou Manchac until it began to fill. Once the level was high enough it began to flow over that road (which acted as a dam the past few days) and has been filling the other 3/4 of Spanish Lake Swamp. The issue is that the SLS doesnt have a "levee" on the iberville side below Manchac and so as it fills the water is pretty free to travel south and flood towards the river and plants nearby. Hwy 74 and 30 are the lower buffer to this area. This is why the NG is flying Chinooks continously dropping large sand bags on the road (Manchac/Paul/Alligator). The are trying to reduce the flow so it can filter out the other side (Iberville) without inundating the plants and houses in that direction. That would be even more catastrophic than the tragedy we have already seen.
All this completely speculation...but it connects a lot of dots in this event.

At 5:30 Manchac was moving very quickly backflow towards Alligator Bayou and Bayou Fountain. Most of this water has been moving towards Alligator Bayou due to the lower level of Spanish Lake than up Bayou Fountain. Manchac has been rising slow but steadily all day and the volume moving through it is incredible. I dont know where all the water could possibly go but backflow out of Spanish Lake in AP and IP. The water flowing over Alligator Bayou Rd and Machac Bayou Rd is all thats kept significant backflow flooding from Bayou Fountain