divert

As we talk about diverting resources, slowly the West declines and collapses in 476 AD.

You also need a way to divert the normal river flows around the construction site.

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.

At the time, there were about 400 vessels waiting to make their pass and many more that had already diverted around the Cape of Good Hope.