290th Street Bridge Pony truss bridge over an unnamed creek on 290th Street Open to traffic Built 1913
330th Street Bridge Lost pony truss bridge over an unnamed creek on 330th Street No longer exists Replaced 2005
370th Street Bridge Lost pony truss bridge over an unnamed creek on 370th Street No longer exists Replaced 2001
485th Street Bridge Pratt pony truss bridge over Tributary of Little Sioux River on private road just off 485th Street Closed to all traffic
Big Meadow Creek Bridge Lost pony truss bridge over Big Meadow Creek on 260th Avenue No longer exists Built 1915; replaced 2000
Burr Oak Bridge Lost through truss bridge over Little Sioux River on 495th Street east of US 71 Destroyed by tornado Built 1905 by the Clinton Bridge & Iron Works; relocated here
in 1926; rehabilitated in 1943 and 1984; destroyed by tornado in June 2004
Little Sioux River Bridge Through truss bridge over Little Sioux River on 470th Street Open to traffic Built 1907; rehabilitated 1960
Little Sioux River Bridge Lost through truss bridge over Little Sioux River on 495th Street No longer exists Built 1926; replaced 2005
Little Sioux River Bridge Through truss bridge over Little Sioux River on 210th Avenue Open to traffic Built 1915
Little Sioux River Bridge Through truss bridge over Little Sioux River on 355th Street Open to traffic Built 1905
Little Sioux River Bridge Concrete arch bridge over Little Sioux River on US 18/US 71 Open to traffic Built 1914; rehabilitated 1951
Meadow Creek Bridge Lost pony truss bridge over Meadow Creek on 290th Street No longer exists Built 1925; replaced 2002
Ocheydan River Bridge Pony truss bridge over Ocheydan River on 340th Street Open to traffic Built 1911
Old Rusty Bridge Through truss bridge over Little Sioux River on 210th Avenue north of Spencer in Spencer Open to one-lane traffic Built 1901 by the Clinton Bridge & Iron Works; relocated here in 1915
Pickeral Run Bridge Pony truss bridge over Pickeral Run on 1st Street in Dickens Open to traffic Built 1923
Spencer Grand Avenue Bridge Lost concrete arch bridge over Little Sioux River on US 18/71 (Grand Avenue) in Spencer Replaced by a new bridge Built 1915; rehabilitated 1951
Stoney Creek 290th Street Bridge Lost pony truss bridge over Stoney Creek on 290th Street No longer exists Built 1904; rehabilitated 1937; replaced 2004
Stoney Creek 300th Street Bridge Lost pony truss bridge over Stoney Creek on 300th Street No longer exists Built ca. 1940; replaced 2005
Teilbur Bridge Through truss bridge over Little Sioux River on 470th Street/240th Avenue east of US 71 Open to one-lane traffic with a weight limit Built 1907 by the Clinton Bridge & Iron Works
Thunder Bridge Through truss bridge over Little Sioux River on 355th Street (Thunder Bridge Road) just off 4th Street in Spencer Open to one-lane traffic Built 1905