- Create a jig for building the long trestle structure for under the building.
- Build the four long sections.
- Build the lateral supports and bracing.
- Paint the trestle structure.
- Glue the trestle structure to the layout's foundations.
- Build and attach all the under-the-building visible details.
- Attach the main building to the trestle structure.
- Design the mine entrance incline.
- Build the mine entrance incline.
- Paint, weather, and detail the mine entrance incline.