closure

So, during a flood defence closure, we don't have to stop the whole tide going into Central London.

That type of construction is profoundly disruptive, requiring road closures, detours, and pavement repairs that never quite seem as nice as the original.

If you're driving around downtown Washington, you have probably experienced the gridlock with the street closures.

You can build most of the structure away from the main channel, then divert the river through the recently-constructed intake or spillway, and finally construct the closure section of the dam.