Stone viaduct

I am making a model of Hogwarts for my train table. I primarily use cast Linka, but with my new 3d printer, I am able to customize pieces that would be hard to do with that system. This is the viaduct bridge. I am going to end up only using the left and right pieces, printed twice, and all 4 glued together (2 front, 2 back).

Update: new picture of my work in progress. Train trestle in foreground.