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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 NISHNABOTNA RIVER Iowa Fair 1929 97 2,320
LONG CREEK Iowa Poor 1929 97 140
DRAINAGE DITCH Iowa Fair 1929 97 2,020
CREEK Iowa Fair 1929 97 72
CREEK Iowa Fair 1929 97 46
BR LITTLE BEAR CREEK Iowa Poor 1929 97 422
CREEK Iowa Poor 1929 97 196
DD 65 Iowa Poor 1929 97 20
W FORK BIG CREEK Iowa Poor 1929 97 15
SHORT CREEK Iowa Poor 1929 97 15
CREEK Iowa Fair 1929 97 424
DRY RUN TO BRUCE CREEK Iowa Fair 1929 97 59
UNNAMED CREEK Iowa Fair 1929 97 167
BRUSH CREEK Iowa Fair 1929 97 34
FLOOD CREEK Iowa Poor 1929 97 26
DRAINAGE DITCH Iowa Fair 1929 97 11
NORTH ENGLISH RIVER Iowa Poor 1929 97 20
SMALL STREAM Iowa Poor 1929 97 41
SILVER CREEK Iowa Poor 1929 97 20
SUGAR CREEK Iowa Poor 1929 97 30
BIG CREEK Iowa Poor 1929 97 130
BR LITTLE WHITEBREAST CR Iowa Poor 1929 97 11
BUCKLEY CREEK Iowa Poor 1929 97 131
STREAM Iowa Poor 1929 97 15
CREEK Iowa Fair 1929 97 45
SKUNK RIVER Iowa Poor 1929 97 60
WHISKEY CREEK Iowa Poor 1929 97 20
NORTH FORK LONG CREEK Iowa Poor 1929 97 5
HONEY CREEK Iowa Fair 1929 97 —
DRAINAGE Iowa Poor 1930 96 9
RALSTON CREEK Iowa Poor 1930 96 2,356
RALSTON CREEK S. BRANCH Iowa Fair 1930 96 133
SMALL STREAM Iowa Fair 1930 96 300
FROG CREEK Iowa Poor 1930 96 95
DREYS DITCH Iowa Fair 1930 96 391
WATSON CREEK Iowa Poor 1930 96 130
DRAINAGE Iowa Poor 1930 96 48
LITTLE SIOUX RIVER Iowa Fair 1930 96 2,560
FLOOD CREEK Iowa Poor 1930 96 668
GALLS CREEK Iowa Poor 1930 96 2,450
DRAINAGE DITCH Iowa Fair 1930 96 2,450
EAST BLUE CREEK Iowa Poor 1930 96 2,583
TURTLE CREEK Iowa Fair 1930 96 746
IAIS RR Iowa Fair 1930 96 5,200
STREAM Iowa Fair 1930 96 1,810
STREAM Iowa Fair 1930 96 2,030
DRAINAGE DITCH Iowa Fair 1930 96 1,810
OVER BNSF RR Iowa Poor 1930 96 1,325
EAST NODAWAY RIVER Iowa Poor 1930 96 33
EAST NODAWAY RIVER Iowa Poor 1930 96 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