nadelwehr

The River Reuss (flows out of lake Luzern and eventually merges with the Rhine River) flows over the Nadelwehr (Needle Dam). The actual dam is currently lying flat on the river bottom. When raised via the chain it diverts the river into a channel in the background. The river is running at a...

This Nadelwehr (Needle Dam) is on the Reuss River in Luzern. As you can see the river is flowing at a pretty good clip.