The Savanna–Sabula Bridge is a truss bridge

Truss bridge

A truss bridge is a bridge composed of connected elements which may be stressed from tension, compression, or sometimes both in response to dynamic loads. Truss bridges are one of the oldest types of modern bridges...

 and causeway crossing the Mississippi River

Mississippi River

The Mississippi River is the largest river system in North America. Flowing entirely in the United States, this river rises in western Minnesota and meanders slowly southwards for to the Mississippi River Delta at the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains...

 and connecting the city of Savanna, Illinois

Savanna, Illinois

Savanna is a city in Carroll County, Illinois, United States. The population was 3,062 at the 2010 census, down from 3,542 at the 2000 census. Savanna is located along the Mississippi River at the mouth of the Plum River. Going from north to south, the second automobile bridge between Iowa and...

 with the island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 city of Sabula, Iowa

Sabula, Iowa

Sabula is a city in Jackson County, Iowa, United States. The population was 670 at the 2000 census. Sabula is the site of Iowa's only island city. The island has a beach and a campground. It also has a harbor with boat docks and storage sheds to store some boats during the winter...

. The bridge carries U.S. Highway 52 over the river. It is also the terminus of both Iowa Highway 64 and Illinois Route 64

Illinois Route 64

Illinois Route 64 is an east–west road in north-central Illinois. Its western terminus is at the Iowa state line, connecting with U.S. Route 52 and Iowa Highway 64 via the Savanna-Sabula Bridge at the Mississippi River west of Savanna...

. The bridge carries an average of 2,400 vehicles daily as of 2005.

Added to the National Register of Historic Places

National Register of Historic Places

The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

in 1999 as structure #99001033.