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
STREAM Iowa Poor 1940 86 20
STREAM Iowa Fair 1940 86 11
MASON CREEK Iowa Poor 1940 86 11
TRIB TO MASON CREEK Iowa Fair 1940 86 15
STREAM Iowa Poor 1940 86 5
STREAM Iowa Poor 1940 86 5
SOUTH RACCOON RIVER Iowa Poor 1940 86 11
STREAM Iowa Poor 1940 86 26
MOSQUITO CREEK Iowa Poor 1940 86 20
MOSQUITO CREEK Iowa Poor 1940 86 34
KEG CREEK Iowa Fair 1940 86 29
ALLEN CREEK Iowa Fair 1940 86 11
ALLEN CREEK Iowa Fair 1940 86 40
HOFFMAN CREEK Iowa Poor 1940 86 29
WILLOW CREEK Iowa Poor 1940 86 45
BOYER RIVER Iowa Poor 1940 86 89
MUD CREEK Iowa Poor 1940 86 79
NORTH TURKEY Iowa Fair 1940 86 79
DRAINAGE DITCH Iowa Fair 1940 86 170
PRICE CREEK Iowa Poor 1940 86 100
CREEK Iowa Poor 1940 86 11
SMALL CREEK Iowa Poor 1940 86 11
CREEK Iowa Poor 1940 86 11
SMALL CREEK Iowa Poor 1940 86 34
CREEK Iowa Poor 1940 86 40
STREAM Iowa Poor 1940 86 5
STREAM Iowa Poor 1940 86 5
SMALL STREAM Iowa Poor 1940 86 35
BEAR CREEK Iowa Fair 1940 86 91
BRANCH OF SILVER CREEK Iowa Fair 1940 86 15
BRANCH OF SUGAR CREEK Iowa Poor 1940 86 16
BUFFALO CREEK Iowa Poor 1940 86 88
SMALL STREAM Iowa Fair 1940 86 290
BR OF CEDAR CREEK Iowa Poor 1940 86 11
FIVE MILE CREEK Iowa Poor 1940 86 16
DR TO FIVE MILE CREEK Iowa Poor 1940 86 16
CARRUTHERS CREEK Iowa Poor 1940 86 5
BR N CEDAR CREEK Iowa Poor 1940 86 -
WILLOW CREEK Iowa Poor 1940 86 50
BRANCH TO CLANTON CREEK Iowa Poor 1940 86 71
DRAINAGE Iowa Poor 1940 86 89
GRAND RIVER Iowa Poor 1940 86 379
SIDE DITCH Iowa Fair 1940 86 10
DRAINAGE Iowa Poor 1940 86 90
DRAINAGE Iowa Poor 1940 86 60
LUTES CREEK Iowa Poor 1940 86 29
BRANCH N SKUNK RIVER Iowa Poor 1940 86 26
MIDDLE TIMBER CREEK Iowa Poor 1940 86 41
DEVILS RUN CREEK Iowa Poor 1940 86 69
CREEK Iowa Poor 1940 86 30

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.