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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
TRIB DES MOINES RIVER Iowa Fair 1900 126 50
LITTLE BEAVER CREEK Iowa Fair 1900 126 26
LITTLE BEAVER CREEK Iowa Poor 1900 126 26
BIG CREEK Iowa Fair 1900 126 40
BEAVER CREEK Iowa Poor 1900 126 26
TRIBUTARY PRAIRIE CREEK Iowa Fair 1900 126 15
BLUFF CREEK Iowa Poor 1900 126 20
TRIB.DES MOINES RIVER Iowa Poor 1900 126 71
TRIB DES MOINES RIVER Iowa Poor 1900 126 26
BEAVER CREEK Iowa Fair 1900 126 5
BEAVER CREEK Iowa Poor 1900 126 11
IOWAY CREEK Iowa Poor 1900 126 15
MONTGOMERY CREEK Iowa Poor 1900 126 34
BLUFF CREEK Iowa Fair 1900 126 30
TRIB DES MOINES RIVER Iowa Poor 1900 126 20
BLUFF CREEK Iowa Fair 1900 126 60
CRANE CREEK Iowa Poor 1900 126 20
STREAM Iowa Poor 1900 126 11
DRAINAGE Iowa Fair 1900 126 79
SMALL STREAM Iowa Fair 1900 126 15
SMALL STREAM Iowa Fair 1900 126 26
MAYNES CREEK Iowa Poor 1900 126 26
SMALL STREAM Iowa Good 1900 126 30
MAYNES CREEK Iowa Fair 1900 126 25
SMALL STREAM Iowa Fair 1900 126 16
STREAM Iowa Fair 1900 126 35
STREAM Iowa Poor 1900 126 35
SMALL STREAM Iowa Fair 1900 126 20
SMALL STREAM Iowa Fair 1900 126 727
STREAM Iowa Poor 1900 126 5
PURGATORY CR. Iowa Poor 1900 126 34
D.D. NO 20 Iowa Poor 1900 126 40
LAKE CREEK W BR Iowa Poor 1900 126 11
CAMP CR. Iowa Poor 1900 126 20
D.D. Iowa Poor 1900 126 20
D.D. NO 83 Iowa Poor 1900 126 15
DD NO 83 Iowa Poor 1900 126 30
W CEDAR CR. Iowa Poor 1900 126 5
N FORK CAMP CR Iowa Poor 1900 126 26
DD 1-54 Iowa Poor 1900 126 26
DD 9-13 Iowa Poor 1900 126 40
DD 88 Iowa Poor 1900 126 26
BIG CEDAR CR DD 181 Iowa Poor 1900 126 15
FIELD STREAM Iowa Fair 1900 126 29
NISHNABOTNA RIVER Iowa Fair 1900 126 45
WILLOW CREEK Iowa Fair 1900 126 26
WILLOW CREEK Iowa Poor 1900 126 40
FIELD STREAM Iowa Fair 1900 126 79
MIDDLE RACOON RIVER Iowa Poor 1900 126 34
FIELD STREAM Iowa Fair 1900 126 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