I think it might of happened this morning. Someone posted a little video of it on youtube that was taken in the afternoon. That gif is of that video.
Seriously, that amount of scouring and erosion occurred in less than a day? How are they planning on keeping the riverbed below cleared of obstruction, explosives? Looking pretty dire, if they’re just running with it like that. It’s not as if there are any alternatives but to do so, I guess.