Twin Box Culvert Drainage Structure

A concrete twin-box culvert with two rectangular openings framed by beveled headwalls and flared wing walls on either side, capped by a flat top slab. Weathered concrete detailing gives it a practical, cast-in-place look.

This infrastructure piece slots under a road, embankment, or rail line to carry a stream or ditch through on a layout, diorama, or wargame board, adding a believable engineered water crossing.

Miniature Reality Personal-Use License (No AI / No Resale)

• Allowed: personal printing for your own layouts, dioramas, tabletop games, and personal display.
• Not allowed: sharing or distributing the digital files (free or paid), re-uploading to any site, bundling, remix resale, or selling/redistributing printed outputs.
• Not allowed: using the files (or derivatives) to train, fine-tune, test, or feed any AI/ML system (including dataset creation).
• Not allowed: commercial use of any kind without a separate written commercial license from Miniature Reality.
• Note: digital files may include purchaser-linked identifiers / forensic watermarking to help investigate unauthorized distribution.