The gained CFM from from the dam is just below the reduction in spillway CFM they need to dredge... channel better stay clear longer than the dredging takes else it is a net negative even with the extra 18k online.
If that’s the case, then it probably won’t happen until later next week. There’s some water coming downstream and I don’t know that they want to back off much on spilling until that gets down to a reasonable level.
Maybe they can do some “rough” or preliminary clearing while things are somewhat turbulent. But I don’t know - that might be unsafe. Those flat barges don’t look very sea-worthy.