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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
STRATTON CREEK Iowa Fair 1922 104 1,330
WAPSI RIVER OVERFLOW Iowa Poor 1922 104 2,310
BR ROBINSON CREEK Iowa Poor 1922 104 1,061
OTTER CREEK Iowa Fair 1922 104 1,730
IOWA RIVER OVERFLOW Iowa Fair 1922 104 1,650
FOURMILE CREEK Iowa Fair 1922 104 6,800
STREAM Iowa Fair 1922 104 9,550
BRANCH YELLOW RIVER Iowa Poor 1922 104 373
BR LITTLE SIOUX RIVER Iowa Poor 1922 104 20
FITZGERALD CR Iowa Fair 1922 104 59
DRAINAGE DITCH Iowa Poor 1922 104 15
BRANCH SUGAR CREEK Iowa Poor 1922 104 26
MIDDLE WALNUT CREEK Iowa Poor 1922 104 15
LIME CREEK Iowa Fair 1922 104 50
SMALL STREAM Iowa Fair 1922 104 5
EAST BR INDIAN CREEK Iowa Poor 1922 104 60
BOHEMIAN CREEK Iowa Poor 1922 104 88
STREAM Iowa Fair 1922 104 1,530
IAIS RR Iowa Fair 1923 103 3,562
STREAM Iowa Fair 1923 103 2,380
STREAM Iowa Fair 1923 103 2,380
WILLOW CREEK Iowa Fair 1923 103 3,940
BREWERS CREEK Iowa Fair 1923 103 5,839
STREAM Iowa Fair 1923 103 5,300
PIG RUN CREEK Iowa Fair 1923 103 5,300
PRAIRIE CREEK Iowa Fair 1923 103 2,510
DUTCH CREEK Iowa Fair 1923 103 1,810
COOPER CREEK Iowa Poor 1923 103 25
BEAVER CREEK Iowa Fair 1923 103 20
BR RACCOON RIVER Iowa Poor 1923 103 20
CROOKED CREEK Iowa Poor 1923 103 230
STREAM Iowa Poor 1923 103 60
BEAVER DAM CREEK Iowa Fair 1923 103 11
WINNEBAGO RIVER Iowa Fair 1923 103 51
PITCHER CREEK Iowa Poor 1923 103 11
CREEK Iowa Poor 1923 103 26
BEAR CREEK Iowa Poor 1923 103 73
UNAMED CR Iowa Poor 1923 103 33
MINK CR Iowa Poor 1923 103 39
UNNAMED CREEK Iowa Poor 1923 103 59
DRAINAGE DITCH Iowa Poor 1923 103 30
DRAINAGE DITCH Iowa Poor 1923 103 11
DRAINAGE DITCH Iowa Poor 1923 103 26
PRAIRIE CREEK Iowa Poor 1923 103 47
SUGAR CREEK Iowa Poor 1923 103 50
STONY CREEK Iowa Poor 1923 103 26
STREAM Iowa Fair 1923 103 15
SMALL STREAM Iowa Poor 1923 103 30
SMALL STREAM Iowa Poor 1923 103 15
CREEK Iowa Poor 1923 103 1,060

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