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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
DYE CREEK Iowa Fair 1900 126 26
WALNUT CREEK Iowa Fair 1900 126 80
BEAR CREEK Iowa Fair 1900 126 45
WEST BR INDIAN CREEK Iowa Poor 1900 126 15
MILFORD 32 DD Iowa Fair 1900 126 34
DD 32 Iowa Fair 1900 126 45
IOWAY CREEK Iowa Poor 1900 126 120
ROAD DITCH Iowa Fair 1900 126 10
HARDIN-STORY DD 1 Iowa Poor 1900 126 15
BEAR CREEK Iowa Poor 1900 126 30
HAMILTON-STORY 1 OPEN DD Iowa Poor 1900 126 34
KEIGLEY BRANCH Iowa Poor 1900 126 15
RICHLAND CREEK Iowa Poor 1900 126 5
SUGAR CREEK Iowa Poor 1900 126 88
JORDAN CREEK Iowa Fair 1900 126 39
DEER CREEK Iowa Fair 1900 126 70
PLATTE BRANCH Iowa Poor 1900 126 15
SIDE DITCH Iowa Fair 1900 126 10
CREEK Iowa Poor 1900 126 5
CREEK Iowa Poor 1900 126 —
STREAM Iowa Poor 1900 126 11
SMALL STREAM Iowa Poor 1900 126 5
STREAM Iowa Poor 1900 126 26
STREAM Iowa Poor 1900 126 21
SMALL STREAM Iowa Poor 1900 126 5
SMALL STREAM Iowa Poor 1900 126 30
WEST PLATTE RIVER Iowa Poor 1900 126 15
STREAM Iowa Poor 1900 126 51
STREAM Iowa Poor 1900 126 15
SMALL STREAM Iowa Poor 1900 126 30
SMALL STREAM Iowa Poor 1900 126 5
PAINTER CREEK Iowa Poor 1900 126 71
STREAM Iowa Poor 1900 126 5
STREAM (SDB) Iowa Poor 1900 126 10
BRUSHY CREEK Iowa Poor 1900 126 30
DEER CREEK Iowa Poor 1900 126 35
N FORK BUFFALO CREEK Iowa Poor 1900 126 5
CREEK Iowa Fair 1900 126 29
CREEK Iowa Poor 1900 126 97
CREEK Iowa Fair 1900 126 29
CREEK Iowa Fair 1900 126 26
CREEK Iowa Poor 1900 126 88
CREEK Iowa Fair 1900 126 39
TROUT CREEK BRANCH Iowa Fair 1900 126 59
TROUT CREEK Iowa Fair 1900 126 29
SMALL STREAM Iowa Fair 1900 126 39
HUMPAL CREEK Iowa Fair 1900 126 78
CREEK Iowa Fair 1900 126 20
CREEK Iowa Fair 1900 126 33
UPPER IOWA RIVER Iowa Poor 1900 126 70

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