The conversation about culverts hits home. I have a hole cut out in my roadbed on my diorama, but haven’t decided how to finish it. Since all my equipment is steam diesel transition era, I want what would be there in about 1950, meaning it was built well before. At first I thought concrete culvert pipe. Then I thought of putting in a box culvert of stone or concrete. Maybe concrete since the tunnel portal is stone to give some variety.
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