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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
WEST NODAWAY RIVER Iowa Poor 1924 102 58
DRAINAGE DITCH Iowa Fair 1924 102 2,480
NORTH SKUNK RIVER Iowa Fair 1924 102 2,180
MUD CREEK Iowa Fair 1924 102 5,200
IOWAY CREEK Iowa Good 1924 102 24,600
MIDDLE BRANCH W 102 RVR Iowa Fair 1924 102 890
BLUE EARTH RIVER Iowa Poor 1924 102 938
CREEK Iowa Fair 1924 102 15
E NISHNABOTNA RIVER Iowa Fair 1924 102 15
E NISHNABOTNA RIVER Iowa Poor 1924 102 5
CREEK Iowa Fair 1924 102 50
TRIB TO SPRING CREEK Iowa Fair 1924 102 393
TRIB QUARTER SECTION RUN Iowa Good 1924 102 69
BEAVER CREEK Iowa Fair 1924 102 15
BROOKS CREEK Iowa Poor 1924 102 11
BROOKS CREEK Iowa Fair 1924 102 11
BR GOWER CR Iowa Poor 1924 102 50
ROCK FALLS CREEK Iowa Fair 1924 102 39
ROCK FALLS CREEK Iowa Fair 1924 102 62
PITCHER CREEK Iowa Poor 1924 102 5
WILLOW CREEK Iowa Poor 1924 102 199
SMALL CREEK Iowa Poor 1924 102 50
W FORK LITTLE SIOUX RVR Iowa Poor 1924 102 26
FIDDLE CREEK Iowa Poor 1924 102 34
CREEK Iowa Poor 1924 102 40
FOUR MILE CREEK Iowa Poor 1924 102 45
THE COULEE Iowa Poor 1924 102 44
CREEK Iowa Poor 1924 102 39
WEST BEAVER CREEK Iowa Fair 1924 102 329
LITTLE BEAVER CREEK Iowa Poor 1924 102 30
LONG DICK CR Iowa Poor 1924 102 20
LONG DICK CREEK Iowa Poor 1924 102 30
IOWAY CREEK Iowa Fair 1924 102 20
DRAINAGE DITCH Iowa Fair 1924 102 50
DRAINAGE DITCH Iowa Fair 1924 102 26
BOONE RIVER Iowa Poor 1924 102 26
DM RIVER Iowa Poor 1924 102 11
SMALL STREAM Iowa Poor 1924 102 361
BYERS BRANCH CREEK Iowa Poor 1924 102 47
BRANCH NORTH TIMBER CRK Iowa Poor 1924 102 41
MILL CREEK Iowa Fair 1924 102 35
MILL CREEK Iowa Poor 1924 102 50
DRY RUN Iowa Fair 1924 102 439
PIGEON CREEK Iowa Poor 1924 102 11
N ENGLISH RIVER Iowa Poor 1924 102 15
STREAM Iowa Poor 1924 102 750
WALNUT CREEK Iowa Poor 1924 102 15
STREAM Iowa Poor 1924 102 50
STREAM Iowa Fair 1924 102 50
STREAM Iowa Poor 1924 102 26

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