Adding a culvert

To the right of this picture, I have roughed in a small hill. It will have a small stream running down the "gulch" which has to get under the two tracks. So I bought a couple of scale concrete culverts and have got them positioned. I drew the line of the drainage pipe diagonally across the tracks so that I could keep the culverts lined up. Now that I know they fit, I am going to fabricate a small piece of scale pipe for each end (behind the concrete wall) so that you cannot look through the hole and see blue styrofoam or a blank wall.

Next step will be to fill in the spaces with something called "Sculpturemold" - a sort of paper mache material. The large piece of styrofoam just above the tracks fills part of the drainage ditch where I got a little over exuberant with my knife - cut away too much. The beauty of styrofoam is that if that happens, you just cut a filler piece, add some Sculpturemold, and you are good to go.

The culvert will take drainage water to the bridge to the left of the picture.