Adair Viaduct
Adair Viaduct is located in Iowa
Adair Viaduct
Adair Viaduct is located in the United States
Adair Viaduct
LocationWhite Pole Road over the Iowa Interstate Railroad tracks
Adair, Iowa
Coordinates41°29′50″N 94°38′36.5″W / 41.49722°N 94.643472°W / 41.49722; -94.643472
Arealess than one acre
Built1923-1924
Built byFederal Bridge Co.
ArchitectIowa State Highway Commission
Architectural styleOpen spandrel arch
MPSHighway Bridges of Iowa MPS
NRHP reference No.98000775[1]
Added to NRHPJune 25, 1998

The Adair Viaduct is a historic structure located in Adair, Iowa, United States. It spans the Iowa Interstate Railroad tracks for 192 feet (59 m).[2] In 1908 Adair County built the first bridge at this location over the Chicago, Rock Island and Pacific Railroad tracks near the site of the 1873 Jesse James train robbery. Increased traffic by the 1920s necessitated its replacement. The Iowa State Highway Commission designed the three-span open spandrel arch bridge. The Adair County Board of Supervisors awarded the $42,263 to build the bridge to the Federal Bridge Company of Des Moines. It is somewhat unusual in Iowa in that the bridge is not symmetrical.[2] Because it is located over a deep cut the two approach spans at 56 feet (17 m) each are shorter than the main span, which is 80 feet (24 m). The bridge was opened to traffic in June 1924. It was listed on the National Register of Historic Places in 1998.[1]

References

  1. 1 2 "National Register Information System". National Register of Historic Places. National Park Service. March 13, 2009.
  2. 1 2 Clayton B. Fraser. "Adair Viaduct". National Park Service. Retrieved 2016-08-01. with photos
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