Spencerville Covered Bridge  Spencerville Covered Bridge is a historic covered bridge located at Spencerville, Spencer Township, DeKalb County, Indiana. It was built in 1873, and spans the St. Joseph River. It is a Smith Type 4 truss bridge on concrete piers. It measures 146 feet long and topped by a gable roof and sided with board-and-batten siding. It one of only six remaining Smith trusses in Indiana. It was added to the National Register of Historic Places in 1981.