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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
RACOON RIVER Iowa Poor 1924 102 71
SMALL STREAM Iowa Poor 1924 102 11
DD#16 Iowa Poor 1924 102 45
KEG CREEK Iowa Poor 1924 102 20
EAST BR INDIAN CREEK Iowa Fair 1924 102 26
EAST BR INDIAN CREEK Iowa Poor 1924 102 5
HAM-STORY 1 OPEN DD Iowa Poor 1924 102 34
UPPER IOWA RIVER Iowa Poor 1924 102 108
CANOE CREEK Iowa Poor 1924 102 20
STREAM Iowa Fair 1924 102 3,000
MAD CREEK Iowa Poor 1924 102 184
STREAM Iowa Good 1924 102 3,090
DRAINAGE Iowa Poor 1925 101 383
SMALL STREAM Iowa Fair 1925 101 450
THE COULEE Iowa Fair 1925 101 26
HONEY CREEK Iowa Poor 1925 101 47
RACCOON RIVER Iowa Fair 1925 101 1,146
STREAM Iowa Fair 1925 101 1,960
SCATTER CREEK Iowa Fair 1925 101 3,020
DRAINAGE DITCH Iowa Fair 1925 101 1,880
SO FORK MAQUOKETA RIVER Iowa Fair 1925 101 1,400
LONE TREE CREEK Iowa Poor 1925 101 5,200
WALNUT CREEK Iowa Fair 1925 101 3,570
SMALL NATURAL STREAM Iowa Poor 1925 101 1,011
WHITE OAK CREEK Iowa Fair 1925 101 1,320
ROCK CREEK Iowa Fair 1925 101 1,340
BRANCH VILLAGE CREEK Iowa Fair 1925 101 570
WALNUT CREEK Iowa Poor 1925 101 30
TROUBLESOME CREEK Iowa Fair 1925 101 46
CREEK Iowa Fair 1925 101 35
BR BLUE GRASS CREEK Iowa Poor 1925 101 21
CREEK Iowa Fair 1925 101 30
SMALL STREAM Iowa Poor 1925 101 940
DITCH Iowa Poor 1925 101 49
LIME CR Iowa Poor 1925 101 11
BR RACCOON RIVER Iowa Poor 1925 101 20
BRUSHY FORK CREEK Iowa Poor 1925 101 60
NORTH RACOON RIVER Iowa Fair 1925 101 40
W BR WAPSINONOC CR Iowa Poor 1925 101 35
BR MILL CR Iowa Poor 1925 101 50
OVERFLOW CHANNEL Iowa Poor 1925 101 15
WEST FORK LITTLE SIOUX Iowa Poor 1925 101 20
SMALL CREEK Iowa Fair 1925 101 26
STREAM Iowa Poor 1925 101 79
STREAM Iowa Fair 1925 101 15
CEDAR CREEK Iowa Fair 1925 101 21
STREAM Iowa Poor 1925 101 26
STREAM Iowa Fair 1925 101 62
STREAM Iowa Fair 1925 101 137
SILVER CREEK Iowa Poor 1925 101 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