Bridge Over the River Why?

It looks a bit dodgy but it may actually work?!

I've been playing around with a Poundland mdf board and some Brigade Models railway track to plan out a visually interesting but useable layout for a trestle railroad bridge. I changed my mind and decided to use a full length board to give me more room for some curved railroad tracks and to allow for some realistic river bank curves, while keeping the railroad embankments to a sensible width and height. 

The bridge itself needs to be tall enough to allow the gunboats to go under whilst not being too high that the bridge looks out of kilter with the rest of the terrain. I'll use a lot of clump foliage to blend in the embankments to the lower levels, which I also think will look pretty effective. I'm going to order a least one more pack of bridges, so that I can have two spans of the girder section which will be painted as a wooden trestle structure rather than an iron bridge. 

I'm also going to try to scratch build some tiny trestle supports for the track bed, channelling my inner railway modelling structural engineer, so it should be a total **** up!