Concrete Slab

Frankford Arch / Slab Bridge (Pike County, Missouri)
Unknown History
Slab bridge over Unnamed Creek on former Frankford - Louisiana Pike
Intact but in danger of eventual collapse.

Grand Isle Causeway (Grand Isle County, Vermont)
Hybrid bridge over Lake Champlain on US-2
Open to traffic

Rosillo Creek Bridge (Bexar County, Texas)
1926 Tee Beam and slab
Open to traffic