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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
MIDDLE NODAWAY RIVER Iowa Poor 1930 96 5
STREAM Iowa Fair 1930 96 40
BRANCH UPPER IOWA RIVER Iowa Fair 1930 96 648
CREEK Iowa Fair 1930 96 71
DES MOINES RIVER Iowa Poor 1930 96 34
BEAVER CREEK Iowa Fair 1930 96 30
TRIBUTARY DES MOINES RIV Iowa Fair 1930 96 71
BR RACCOON RIVER Iowa Poor 1930 96 30
CEDAR RIVER Iowa Poor 1930 96 72
MIDDLE BR WAPSINONOC CR Iowa Poor 1930 96 20
STREAM Iowa Poor 1930 96 11
CROOKED CR Iowa Poor 1930 96 20
ROCK RUN CREEK Iowa Poor 1930 96 26
MILL CR Iowa Poor 1930 96 20
BEAR CR Iowa Poor 1930 96 589
STREAM Iowa Fair 1930 96 30
CEDAR CREEK Iowa Fair 1930 96 44
SILVER CREEK Iowa Fair 1930 96 98
WAPSIPINICON RIVER Iowa Poor 1930 96 100
BRANCH OF WAPSIPINICON Iowa Poor 1930 96 100
LONG CREEK Iowa Poor 1930 96 21
SMALL STREAM Iowa Poor 1930 96 59
STREAM Iowa Poor 1930 96 79
PRAIRIE CREEK Iowa Fair 1930 96 118
MIDDLE RIVER Iowa Poor 1930 96 60
STREAM Iowa Poor 1930 96 5
MOSQUITO CREEK Iowa Poor 1930 96 20
SIX MILE CREEK Iowa Poor 1930 96 11
LITTLE PIGEON Iowa Poor 1930 96 11
WILLOW RIVER Iowa Poor 1930 96 11
MILLER CREEK Iowa Poor 1930 96 30
BRANCH OLD MANS CREEK Iowa Poor 1930 96 50
SMALL STREAM Iowa Poor 1930 96 60
SMALL CREEK Iowa Fair 1930 96 11
DRY RUN Iowa Fair 1930 96 5
CREEK Iowa Fair 1930 96 71
ALLOWAY CREEK Iowa Fair 1930 96 30
SMALL STREAM Iowa Poor 1930 96 41
CLEAR CREEK Iowa Poor 1930 96 80
PRAIRIE CR Iowa Fair 1930 96 26
RAPID CR Iowa Fair 1930 96 1,220
STREAM Iowa Poor 1930 96 160
CEDAR CREEK Iowa Fair 1930 96 40
SMALL Iowa Fair 1930 96 40
SMALL STREAM Iowa Poor 1930 96 11
SMALL STREAM Iowa Poor 1930 96 11
BR CARRUTHERS CREEK Iowa Poor 1930 96 21
DRAINAGE Iowa Poor 1930 96 40
WATERWAY Iowa Poor 1930 96 100
DRAINAGE Iowa Poor 1930 96 180

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