I´m armchair mapping looking at a waterfall with a reservoir of water blocked by a weir or dam. Seems to be a road on both sides, so it´s possible to drive.
It is a dry river to the right and the reason why is that a concrete barrier stops the water.
If you look to the left of the barrier, it is water like a reservoir.
I´m looking at Bing imagery also.
For the road, I would link them if you use a way for the dam. That’s because the road is (as far as I can see) directly on top of the dam, and they are the same structure.
But you could also use an area for the dam, and then the road can run along the middle of the area - something like the bridge here, but replace the bridge with the dam.