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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
OCHEYEDAN RIVER Iowa Poor 1900 126 26
STREAM Iowa Fair 1900 126 26
STREAM Iowa Fair 1900 126 21
STREAM Iowa Poor 1900 126 11
W F LITTLE SIOUX Iowa Poor 1900 126 15
DRY BRANCH Iowa Poor 1900 126 11
MUD CREEK Iowa Poor 1900 126 26
JOHNS CREEK Iowa Poor 1900 126 26
CREEK Iowa Fair 1900 126 5
CREEK Iowa Poor 1900 126 30
CREEK Iowa Poor 1900 126 30
MUD CREEK Iowa Poor 1900 126 11
BIG WHISKEY CREEK Iowa Poor 1900 126 11
PERRY CREEK Iowa Poor 1900 126 20
SMALL Iowa Fair 1900 126 628
DD Iowa Good 1900 126 30
RATHBURN CREEK Iowa Poor 1900 126 30
DD Iowa Poor 1900 126 15
DRAINAGE Iowa Fair 1900 126 15
JOHNS CREEK Iowa Poor 1900 126 11
CARTER CREEK Iowa Poor 1900 126 11
PERRY CREEK Iowa Poor 1900 126 5
DRAINAGE Iowa Poor 1900 126 11
DEEP CREEK Iowa Poor 1900 126 71
PLYMOUTH CREEK Iowa Fair 1900 126 100
DRAINAGE Iowa Poor 1900 126 34
DRAINAGE Iowa Fair 1900 126 20
BROKEN KETTLE CREEK Iowa Poor 1900 126 30
DRAINAGE Iowa Poor 1900 126 30
WESTFIELD CREEK Iowa Poor 1900 126 11
WESTFIELD CREEK Iowa Fair 1900 126 11
W BR FLOYD RIVER Iowa Poor 1900 126 20
MINK CREEK Iowa Poor 1900 126 45
MINK CREEK Iowa Poor 1900 126 34
INDIAN CREEK Iowa Good 1900 126 34
INDIAN CREEK Iowa Poor 1900 126 15
INDIAN CREEK Iowa Poor 1900 126 20
BROKEN KETTLE CREEK Iowa Poor 1900 126 34
INDIAN CREEK Iowa Poor 1900 126 20
BEAVER CREEK Iowa Poor 1900 126 26
N LIZARD CREEK Iowa Poor 1900 126 30
BEAVER CREEK Iowa Poor 1900 126 20
MUD CREEK Iowa Fair 1900 126 213
CREEK Iowa Fair 1900 126 40
LOTTS CREEK Iowa Poor 1900 126 20
UNNAMED CREEK Iowa Fair 1900 126 1,117
NO NAME CREEK Iowa Good 1900 126 40
SM STREAM Iowa Fair 1900 126 34
SMALL STREAM Iowa Poor 1900 126 110
EAST BR INDIAN CREEK Iowa Poor 1900 126 34

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