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Historic Bridges in Iowa

3,036 bridges built before 1951 in Iowa still in service today.

Bridges Built Before 1951

The United States has 3,036 bridges in Iowa built before 1951 that remain in active service. These structures are 75+ years old — many predate modern engineering codes and were not designed for today's traffic volumes and vehicle weights. The average design life of a bridge is 50 years, making these aging structures a significant infrastructure concern.

Clear
Bridge State Condition Year Built Age (Years) ADT
OVERFLOW L VOLGA R Iowa Poor 1916 110 39
L WAPSIPINICON RIVER Iowa Poor 1916 110 43
BELL CREEK Iowa Fair 1916 110 15
UNNAMED CREEK Iowa Poor 1916 110 49
SMALL CREEK Iowa Poor 1916 110 78
LONG DICK CR Iowa Poor 1916 110 20
WILLOW RIVER Iowa Poor 1916 110 100
SMALL CREEK Iowa Poor 1916 110 29
CREEK Iowa Poor 1916 110 145
MIDDLE TIMBER CREEK Iowa Poor 1916 110 51
LINN CREEK Iowa Poor 1916 110 21
N SKUNK RIVER Iowa Fair 1916 110 30
CREEK Iowa Poor 1916 110 123
LITTLE ASHER CR Iowa Poor 1916 110 118
MINERVA CREEK Iowa Poor 1916 110 147
LINN CR Iowa Poor 1916 110 157
DOWD CREEK Iowa Poor 1916 110 16
DOWD CREEK Iowa Poor 1916 110 39
JORDAN CREEK Iowa Poor 1916 110 —
STREAM Iowa Fair 1916 110 35
N LIZARD CREEK Iowa Poor 1916 110 5
N LIZARD CREEK Iowa Poor 1916 110 11
INDIAN CREEK Iowa Poor 1916 110 45
STREAM Iowa Poor 1916 110 15
SMALL STREAM Iowa Poor 1916 110 11
BOYER RIVER Iowa Poor 1916 110 60
GRANT 5 OPEN DITCH EXT Iowa Poor 1916 110 131
CALAMUS CREEK Iowa Fair 1916 110 15
BRANCH WOLF CREEK Iowa Poor 1916 110 34
GOOSE CREEK Iowa Fair 1916 110 10
IOWA RIVER Iowa Poor 1916 110 5,400
FLEENER CREEK Iowa Poor 1917 109 181
WAPSIPINICON RIVER Iowa Fair 1917 109 10,258
MUNNS CREEK Iowa Fair 1917 109 1,270
BIG CREEK Iowa Poor 1917 109 30
BUCK CREEK Iowa Poor 1917 109 15
BR RACCOON RIVER Iowa Poor 1917 109 40
DD #83 Iowa Poor 1917 109 60
LAKE CREEK Iowa Poor 1917 109 20
ROCK CR Iowa Poor 1917 109 15
CALMUS CREEK Iowa Poor 1917 109 44
WILLOW CREEK Iowa Poor 1917 109 15
ROCK CREEK Iowa Poor 1917 109 5
FIDDLE CREEK Iowa Poor 1917 109 5
SMALL CREEK Iowa Poor 1917 109 26
BADGER CREEK Iowa Poor 1917 109 170
WEST FORK LITTLE SIOUX Iowa Poor 1917 109 5
STREAM Iowa Poor 1917 109 11
MILL CREEK Iowa Poor 1917 109 15
ELK CREEK Iowa Poor 1917 109 11

About Historic Bridge Data

Bridges built before 1951 are classified as historic in this database. Many were designed to 1940s standards with lower load limits and narrower lanes. While FHWA requires regular inspections of all bridges regardless of age, older structures often require more frequent monitoring and rehabilitation investment.

All Bridges Poor Condition Scour Critical Bridge Stats