I had a damned good root around at York on Sunday. Unfortunately virtually all the mdf offerings were poor. Consisting of nothing but blank mdf silhouettes of girder frames.
In fact in the box girder bridge category Sarissa offered the most detailed frames. The only bridges that offered any real value,and scenario options were the Sarissa Canal bridges. Unfortunately I couldn't find any dimensions on the website. As I got completely side-tracked with the gangs of Rome mdf.It slipped my mind to ask the actual dimensions for the span of these bridges.
In fact I came away with three sets,including the temple. Which is a very interesting piece of kit.It'll fit in with everything I do. It'll work as a civic building in a 20th century setting too,(law courts,city hall sort of thing.)
Right waffle over now I've seen what you've done with the canal I'd say save your money that bridge has done you proud.
I'd recommend you push the hedges back and have a towpath along the canal edge and a waist high brick wall behind the hedge on the town side(possibly not a continuous hedge row ,only even two three small shrub sized lengths.) then just one or two grass tufts the town side of the low wall,and the towpath side
As it'll give a more natural look and make the transition from one bank to the other, look less stark.
It's a trick I use on museum builds. It helps subtly draw your eye in the transition from rural to urban. Rather than green,green,green,wham town.
Mark.