457th Avenue Bridge Deck truss bridge over Creek on 457th Avenue, 11.4 mi. south and 5 mi. east of Irene in Bethel Township Open to traffic Built 1915
464th Avenue Bridge Lost pony truss bridge over an unnamed creek on 464th Avenue, 5.5 mi. south and 12 mi. east of Irene No longer exists Built ca. 1910; rehabilitated 1950; replaced 2005
Ash Creek Bridge Lost pony truss bridge over Ash Creek on 298th Street, 1 mi. south and 14.2 mi. east of Irene No longer exists Built 1912; replaced 2002
Norwegian Ave. Bridge Pony truss bridge over Frog Creek on Norwegian Ave., 7.5 mi. east and 5.1 mi. south of Irene in Riverside Township Open to traffic Built 1900
Russell Bridge Through truss bridge over Clay Creek Ditch on 314th Street, 3.5 mi. north and 3.2 mi. west of Vermillion in Spirit Mound Township Open to traffic Built ca. 1890 by the King Bridge Co.
Spring Creek Bridge Concrete arch bridge over Spring Creek on 458th Avenue, 3.2 mi. south and 6 mi. east of Irene in Star Township Open to traffic Built ca. 1916
Vermillion River Bridge Through truss bridge over Vermillion River on 303RD ST., 6 mi. south and 7.8 mi. east of Irene in Pleasant Valley Township Open to traffic Built 1909; rehabilitated 1970
Vermillion River Bridge Pony truss bridge over Vermillion River on 461st Avenue, 4.2 mi. south and 9 mi. east of Irene in Riverside Township Open to traffic Built 1912 by the Federal Bridge Co.
Vermillion River Bridge Pony truss bridge over Vermillion River on 308 ST, 10.5 mi. south and 11.8 mi. east of Irene in Pleasant Valley Township Open to traffic Built 1930
Vermillion River Bridge Pony truss bridge over Vermillion River on 464th Avenue., 11.1 mi. south and 12 mi. east of Irene in Garfield Township Open to traffic Built 1930
Vermillion River Bridge Pony truss bridge over Vermillion River on Carp St., 13.3 mi. south and 12.2 mi. east of Irene in Prairie Center Township Open to traffic Built 1930
Vermillion River Bridge Through truss bridge over Vermillion River on 465th Avenue., 2.9 mi. north and 1 mi. east of Vermillion in Prairie Center Township Open to traffic Built 1930
Vermillion River Bridge Through truss bridge over Vermillion River on 314th Street., 3.5 mi. north and 1.3 mi. east of Vermillion in Prairie Center Township Open to traffic Built 1930; rehabilitated 2003
Vermillion River Bridge Pony truss bridge over Vermillion River on 313th Street., 4.5 mi. north and 1.8 mi. east of Vermillion in Prairie Center Township Open to traffic Built 1910