Sink a damn barge in front of it, something. Plugging a damn hole can't be that impossible a feat when you know for years its the only thing saving your city.
Then why build a dyke? Just sink some barges. Easy Peezy.
its not that simple, and Im kinda ticked that people keep saying this. Its a narow canal...not the lake and not the river. its not wide and if the barge, which you cant steer, goes off course and takes out more chunks of the wall then it only gets that much worse.
maybe they can drop cars into the hole to clow it enought o fill the rest with sandbags.
One problem, FWIU, is that the levees themselves are basically just mounds of dirt. Adding something on top of a levee won't do much good if ANY water gets under the new thing you added. Instead, the flow under the new object will quickly erode the levy below it and may--especially if the erosion allows the object to fall through--result in a larger breach than if the "repair" had not been attempted.
It's really impossible if you belong to the Democratic Party, apparently.