Sewers puzzle

[GoDl1Kelol]

You probably figured it out but at the pipes place you have to put the long one in the middle, the large one ontop of it so it gets two holes while the large one is inside it and the last one to the left or right depending on where the hole is.Then when the second bridge comes down pick something from the ground and throw it ontop of the ladder then use it to knock the bridge down.