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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
CREEK Iowa Poor 1918 108 29
BROOKS CREEK Iowa Poor 1918 108 30
W ROCK CR Iowa Poor 1918 108 11
BEAVER DAM CREEK Iowa Fair 1918 108 5
WILLOW CREEK Iowa Fair 1918 108 82
MAPLE RIVER Iowa Poor 1918 108 11
STREAM Iowa Fair 1918 108 62
BEAR CR Iowa Poor 1918 108 15
CREEK Iowa Poor 1918 108 131
WILLOW RIVER Iowa Fair 1918 108 29
NORTH BIG CREEK Iowa Fair 1918 108 11
NORTH SKUNK RIVER Iowa Poor 1918 108 25
SMALL STREAM Iowa Poor 1918 108 62
INDIAN CREEK Iowa Poor 1918 108 35
HONEY BRANCH CREEK Iowa Poor 1918 108 20
SUGAR CREEK Iowa Poor 1918 108 11
SNIPE CREEK Iowa Poor 1918 108 35
CREEK Iowa Poor 1918 108 35
CREEK Iowa Poor 1918 108 30
CREEK Iowa Poor 1918 108 47
CREEK Iowa Poor 1918 108 25
SO LIZARD CR DD#22 Iowa Poor 1918 108 20
STREAM Iowa Poor 1918 108 11
HALFWAY CREEK Iowa Poor 1918 108 50
SOUTH CHARITON RIVER Iowa Poor 1918 108 40
CREEK Iowa Fair 1918 108 11
DITCH #77 Iowa Fair 1919 107 13,000
DRAINAGE DITCH Iowa Poor 1919 107 1,159
STREAM Iowa Fair 1919 107 6,800
STREAM Iowa Fair 1919 107 4,490
SMALL CREEK Iowa Poor 1919 107 30
MAPLE RIVER Iowa Poor 1919 107 30
SMALL CREEK Iowa Poor 1919 107 11
BR MAPLE RIVER Iowa Poor 1919 107 20
ACKLEY CREEK Iowa Fair 1919 107 26
CREEK Iowa Fair 1919 107 29
EAST BUTTRICK CREEK Iowa Fair 1919 107 35
DRAINAGE DITCH Iowa Poor 1919 107 30
HONEY CREEK Iowa Poor 1919 107 16
SOUTH FORK Iowa Poor 1919 107 29
BUCK CREEK Iowa Poor 1919 107 104
MINERVA CR Iowa Poor 1919 107 30
LINN CREEK Iowa Poor 1919 107 30
BR MINERVA CR Iowa Poor 1919 107 30
CREEK Iowa Fair 1919 107 285
WILLOW CR Iowa Poor 1919 107 26
SMALL STREAM Iowa Fair 1919 107 26
DD #31 Iowa Fair 1919 107 34
SMALL CREEK Iowa Fair 1919 107 26
SMALL STREAM Iowa Fair 1919 107 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