Bridge Over Troubled Water

I've now glued, filled and sanded down the two cork tile river banks that will form the landscape on my modular railroad bridge terrain tile, so I can now start working out exactly how to scratch build a typical ACW era timber trestle bridge. I've had a few ideas about how to so this, from gluing together plastic rod into trestle supports (very fiddly) to cutting up some plastic mesh and using it to make the bridge structure (probably doomed to failure), but I'm sure I can come up with something that looks the part. In the meantime, I can at least get the river bed painted and do some more sanding and texturing to smooth off the contour lines.