Trestles for river crossing

I've put in a bit of a river, just below one track at the edge of the layout. It's a low crossing, so I built a few trestle bents out of balsa wood. This shot is taken after the third pour of Envirotex. It will probably get two more pours to bring the water level up some more. The surrounding scenery has a Gypsolite base and some coloring, but it still needs turf, flocking and trees after the water is in and fully set up.