Water Bridge in Germany

Have you ever seen a river over a river? AMAZING....
Even after you see it, it is still hard to believe!
Water Bridge in Germany . What a feat! 

The photo was taken on the day of inauguration . . .
To those who appreciate engineering projects, here's a puzzle for your armchair engineers and physicists.

Question:
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, or just the weight of the water?
Answer:
It only needs to be designed to withstand the weight of the water!
Why?
A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded. Six years, 500 million Euros, 918 meters long . . . now, this is engineering! 

This is a channel-bridge over the River Elbe and joins the former East and West Germany ,
as part of the unification project. It is located in the city of Magdeburg , near Berlin .

Source of image and information:  Facebook