JumbleDuck
Well-Known Member
Here is a picture of the downstream lock gate in the main lock at Vogelgrun, on the Grand Canal d'Alsace next to Breisach.
It's a vertical gate and is lowered into position after a ship enters the lock. So far so good. However, the top of the gate is well below the water level in the lock when it is full. I watched a ship go through a couple of weeks ago and could see the water cover the gate.
So ... what keeps the water in? There must be some other retaining thingy somewhere, but from where I was on the bridge I couldn't see it.
It's a vertical gate and is lowered into position after a ship enters the lock. So far so good. However, the top of the gate is well below the water level in the lock when it is full. I watched a ship go through a couple of weeks ago and could see the water cover the gate.
So ... what keeps the water in? There must be some other retaining thingy somewhere, but from where I was on the bridge I couldn't see it.