Ost Valle Bridge

The Ost Valle Bridge is a bridge near Thompson, North Dakota that was listed on the National Register of Historic Places in 1997. It crosses an unnamed tributary of the Red River, about one mile west of the Red River itself. It is "one of the two oldest documented bridges in Grand Forks County that were built by long-term county bridge builder, the Jardine & Anderson".

It was probably built in 1910, based on examining county records.

It includes Pratt through truss design/architecture.

The property was covered in a study of Historic Roadway Bridges of North Dakota.