Spencerville Covered Bridge in Spencerville, Indiana, spans the Saint Joseph River and was built in 1873 as a covered Smith Type 4 truss bridge on concrete piers. At 146 feet long, it is a substantial surviving example of a once-common rural bridge type, with a simple gable roof and board-and-batten siding that give it the classic enclosed form of 19th-century covered bridges. It is especially significant because it preserves the rare Smith truss design and is one of only six remaining in Indiana. Its age and rarity brought National Register recognition in 1981, and in 2021 it was identified as a top U.S. rural bridge repair priority.