The Makings of a Bridge

I have decided to construct a bridge over a large creek loosely based on south Australian terrain and infrastructure, my design has been stitched up with reference to three spots around south Australia, Hamley Bridge, Currency Creek and the old Eden Hills viaduct, the later having been torn down over 80 years ago. The bridge itself will be an open deck plate girder bridge painted in the typical red of the SAR. It will have 4 concrete piers and concrete abutments constructed from wood. The terrain is constructed out of 4 sheets of 50mm thick extruded polystyrene stacked up on top of one another. The creek is a deep ravine very similar to the geography of currency creek on the Strathalbyn/Goolwa railway line to the south of Adelaide. The creek itself will be very small but the ravine will have thick trees and shrub. This is the current progress, and a photo of the prototype at currency creek !