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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
FIELD STREAM Iowa Poor 1900 126 11
FIELD STREAM Iowa Fair 1900 126 71
PURGATORY CREEK Iowa Fair 1900 126 —
ELK RUN Iowa Fair 1900 126 34
BEAMAN CREEK Iowa Fair 1900 126 748
WATERWAY Iowa Poor 1900 126 15
WATERWAY Iowa Poor 1900 126 89
WATERWAY Iowa Fair 1900 126 15
LONE TREE CREEK Iowa Poor 1900 126 29
TURKEY CR Iowa Poor 1900 126 5
CREEK Iowa Fair 1900 126 30
WATERWAY Iowa Poor 1900 126 35
WATERWAY Iowa Fair 1900 126 60
CREEK Iowa Poor 1900 126 26
CREEK Iowa Poor 1900 126 26
TURKEY CREEK Iowa Poor 1900 126 35
WATERWAY Iowa Poor 1900 126 379
SPRING CREEK Iowa Poor 1900 126 15
TROUBLESOME CREEK Iowa Poor 1900 126 5
BUCK CREEK Iowa Poor 1900 126 30
EAST NISHNABOTNA RIVER Iowa Poor 1900 126 123
CREEK Iowa Poor 1900 126 11
BR ROCK RUN CR Iowa Poor 1900 126 26
BEAVER DAM CREEK Iowa Poor 1900 126 16
WILLOW CREEK Iowa Poor 1900 126 26
ROCK FALLS CREEK Iowa Poor 1900 126 26
MAPLE RIVER Iowa Poor 1900 126 26
CREEK Iowa Fair 1900 126 45
ROCK CREEK Iowa Poor 1900 126 20
SMALL CREEK Iowa Fair 1900 126 20
SMALL CREEK Iowa Poor 1900 126 15
MAPLE RIVER Iowa Poor 1900 126 40
SMALL CREEK Iowa Poor 1900 126 429
CREEK Iowa Poor 1900 126 15
EAST WAPSIPINICON Iowa Poor 1900 126 98
CHARITON CREEK Iowa Poor 1900 126 34
EAST LONG CREEK Iowa Poor 1900 126 5
BR LONG CREEK Iowa Fair 1900 126 20
SMALL CREEK Iowa Poor 1900 126 40
SMALL STREAM Iowa Poor 1900 126 20
SOUTH RIVER Iowa Poor 1900 126 11
LOCAL CREEK Iowa Fair 1900 126 20
SOUTH RIVER Iowa Poor 1900 126 40
STREAM Iowa Fair 1900 126 123
PLUM CREEK Iowa Poor 1900 126 49
CARLAN CR Iowa Poor 1900 126 21
STREAM Iowa Poor 1900 126 11
STREAM Iowa Fair 1900 126 15
ROBERTS CREEK Iowa Fair 1900 126 98
UNION CREEK Iowa Poor 1900 126 78

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