The Savanna crossing has a very long and winding causeway from the west, perhaps 6 miles long, before this elegant truss structure crosses the main channel of the river. The city of Sabula, Iowa, is located on an island about halfway across the causeway.

This is likely the least busy upper Mississippi River crossing, at least the least busy of any crossing south of the Twin Cities. In fact, I was able to park on the roadway to take many of these photos. While the bridge is free today, it was a toll bridge until 1987, when the toll was 60 cents.

The photos below show a typical crossing, starting in Iowa, crossing the causeway into Sabula, exiting Sabula, following the causeway to the main channel of the river, and then crossing the main channel bridge. One question that I was left with is if there is a bridge or culvert allowing water to flow from one side of the causeway to the other leading into Sabula from the Iowa side of the crossing. The fourth photo below shows that there is in fact a small bridge in the causeway. This bridge is not easy to spot when driving across the causeway. The embankment in that photo behind the highway causeway is the railroad bridge causeway. That structure is more than a mile south of the highway causeway. This is an optical effect of using a long telephoto lense where the background is pulled closer to the viewer than it appears in nature.