The National Register of Historic Places in the United States is a register including buildings, sites, structures, districts, and objects. The Register automatically includes all National Historic Landmarks as well as all historic areas administered by the U.S. National Park Service. Since its introduction in 1966, more than 90,000 separate listings have been added to the register.
The Fort Madison Toll Bridge is a tolled, swinging truss bridge over the Mississippi River that connects Fort Madison, Iowa, and unincorporated Niota, Illinois. Rail traffic occupies the lower deck of the bridge, while two lanes of road traffic occupy the upper deck. The double-decker bridge, about 1 mile (1.6 km) long with a swing span of 525 feet (160 m), was the longest and largest double-deck swing-span bridge in the world when constructed in 1927. It replaced an inadequate combination roadway/single-track bridge completed in 1887. The main river crossing consists of four 270-foot (82 m) Baltimore through truss spans and a swing span made of two equal arms, 266 feet (81 m) long. In 1999, it was listed in the National Register of Historic Places under the title, Fort Madison Bridge, ID number 99001035. It was also documented as survey number IA-62 by the Historic American Engineering Record, archived at the Library of Congress. Construction and photographic details were recorded at the time in Scientific American magazine.
The Cotter Bridge, also known as the R. M. Ruthven Bridge and the White River Concrete Arch Bridge, carries U.S. Route 62 Business across the White River west of the city of Cotter in Baxter County, Arkansas. Upon completion, the bridge opened a part of the Ozarks previously inaccessible to motorists. Constructed in 1930, it is the only bridge built by the Marsh Engineering Company of Des Moines, Iowa, in the state of Arkansas.
The Frisco Bridge, previously known as the Memphis Bridge, is a cantilevered through truss bridge carrying a rail line across the Mississippi River between West Memphis, Arkansas, and Memphis, Tennessee.
The Burlington Bridge is a vertical-lift railroad bridge across the Mississippi River between Burlington, Iowa, and Gulfport, Illinois, United States. It is currently owned by BNSF Railway and carries two tracks which are part of BNSF's Chicago–Denver main line.
The Government Bridge or Arsenal Bridge spans the Mississippi River, connecting Rock Island, Illinois and Davenport, Iowa. The Iowa Interstate Railroad uses the upper deck of the bridge for its ex-Chicago and Rock Island Railroad route between Council Bluffs, Iowa and Chicago, Illinois. The lower deck carries automobile traffic between the two cities. It is located near Upper Mississippi Mile Marker 483, adjacent to the Mississippi River Lock and Dam No. 15. The current structure is the fourth at this location. The bridges all were built with a swing section to accommodate traffic navigating the river.
Cairo Rail Bridge is the name of two bridges crossing the Ohio River near Cairo, Illinois. The original was an 1889 George S. Morison through truss and deck truss bridge replaced by the current bridge in 1952. The second and current bridge is a through truss bridge that reused many of the original bridge piers. As of 2018, trains like the City of New Orleans travel over the Ohio River supported by the same piers whose construction began in 1887.
The Rulo Rail Bridge is a truss bridge across the Missouri River connecting Rulo, Nebraska, with Holt County, Missouri, and is used by the BNSF Railway to transport coal from Wyoming and Colorado to Midwest power plants.
The Union Pacific Missouri River Bridge is a rail truss bridge across the Missouri River between Council Bluffs, Iowa, and Omaha, Nebraska.
The Plattsmouth Bridge is a truss bridge over the Missouri River connecting Cass County, Nebraska, and Mills County, Iowa at Plattsmouth, Nebraska. Until 2014, it carried U.S. Highway 34 across the river.
The Mormon Bridge are two cantilever bridges that cross the Missouri River connecting Pottawattamie County, Iowa with Florence in the north end of Omaha, Nebraska via Interstate 680 (Iowa-Nebraska). The bridge is officially called the Mormon Pioneer Memorial Bridge due to its location on the historic Mormon Trail, which passed nearby.
The Chouteau Bridge a four-lane girder bridge on Route 269 across the Missouri River between Jackson County, Missouri, and Clay County, Missouri. The bridge is named for Francois Chouteau, who was a member of the Chouteau fur trapping family and is considered the first permanent settler in Kansas City.
The Hermann Bridge was a cantilevered truss bridge over the Missouri River at Hermann, Missouri, between Gasconade County, Missouri, and Montgomery County, Missouri. The bridge formerly carried Route 19 traffic and was closed on July 23, 2007, when the Christopher S. Bond Bridge was opened to traffic.
The Sioux City and Pacific Railroad was a railroad in the U.S. states of Iowa and Nebraska. Built as a connection from Sioux City, Iowa to the Union Pacific Railroad at Fremont, Nebraska, it became part of the Chicago and North Western Railway system in the 1880s, and is now a main line of the Union Pacific (UP). The east–west portion from Fremont to Missouri Valley, Iowa, is the Blair Subdivision, carrying mainly westbound UP trains, and the line from California Junction, Iowa north to Sioux City is the Sioux City Subdivision.
The Blair Bridge or Abraham Lincoln Memorial Bridge carries U.S. Route 30 between the U.S. states of Nebraska and Iowa, across the Missouri River near Blair, Nebraska. Rail traffic crosses via the parallel Blair Bridge.
The Siouxland Veterans Memorial Bridge is a through arch bridge which carries U.S. Route 77 across the Missouri River between Sioux City, Iowa, and South Sioux City, Nebraska.
The Elkader Keystone Bridge is a historic structure located in Elkader, Iowa, United States. The old iron truss bridge that crossed the Turkey River at this location was declared unsafe in 1888. The Clayton County Board of Supervisors decided to construct a bridge of native limestone as way of saving money and providing a reliable crossing. Engineer M. Tschirgi designed the structure and Dubuque stonemasons Byrne and Blade constructed the bridge. It was built at a cost of $16,282, and spans the river for 346 feet (105 m). This is one of the largest twin arched keystone bridges west of the Mississippi River. A sidewalk was added on the north side of the structure in 1924. The bridge was individually listed on the National Register of Historic Places in 1976.
