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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
BIG CEDAR CREEK Iowa Fair 1950 76 40
CREEK Iowa Fair 1950 76 50
CREEK Iowa Fair 1950 76 50
BR.WALNUT CREEK Iowa Poor 1950 76 34
BR RAPID CR Iowa Poor 1950 76 130
BR RAPID CR Iowa Poor 1950 76 490
OVERFLOW Iowa Poor 1950 76 393
MINERAL CREEK Iowa Fair 1950 76 34
STREAM Iowa Fair 1950 76 20
STREAM Iowa Fair 1950 76 30
STREAM Iowa Fair 1950 76 11
STREAM Iowa Fair 1950 76 70
STREAM Iowa Poor 1950 76 30
LAMALEES CREEK Iowa Fair 1950 76 60
SMALL STREAM Iowa Fair 1950 76 650
SM STREAM Iowa Poor 1950 76 490
SMALL STREAM Iowa Fair 1950 76 47
SMALL STREAM Iowa Good 1950 76 690
BR OF LITTLE WHITEBREAST Iowa Fair 1950 76 60
LITTLE ROCK RIVER Iowa Fair 1950 76 50
WATERWAY Iowa Poor 1950 76 41
OLIVE BRANCH CREEK Iowa Poor 1950 76 30
N COAL CREEK Iowa Fair 1950 76 60
DRAINAGE Iowa Poor 1950 76 80
MIDDLE CREEK Iowa Fair 1950 76 20
CEDAR CREEK Iowa Fair 1950 76 10
DRAINAGE Iowa Poor 1950 76 45
M BR BUCKLEY CREEK Iowa Poor 1950 76 45
DRAINAGE Iowa Poor 1950 76 34
SMALL STREAM Iowa Fair 1950 76 45
SOUTH TIMBER CREEK Iowa Poor 1950 76 21
SNIPE CREEK Iowa Poor 1950 76 16
NORTH TIMBER CREEK Iowa Poor 1950 76 5
CLEAR CREEK Iowa Poor 1950 76 11
ROCK CR Iowa Poor 1950 76 30
ROCK CR Iowa Fair 1950 76 5
MINERVA CR Iowa Poor 1950 76 26
DEER CREEK Iowa Fair 1950 76 11
HUNTER BRANCH Iowa Poor 1950 76 15
INDIAN CREEK Iowa Poor 1950 76 51
DEER CREEK Iowa Poor 1950 76 59
BIG CEDAR RIVER Iowa Good 1950 76 1,021
CREEK Iowa Poor 1950 76 20
LOCAL STREAM Iowa Fair 1950 76 40
CREEK Iowa Poor 1950 76 60
MOFFAT BRANCH Iowa Fair 1950 76 80
STREAM Iowa Fair 1950 76 30
LITTLE TARKIO CREEK Iowa Poor 1950 76 11
SMALL STREAM Iowa Fair 1950 76 320
WATERMAN CREEK Iowa Fair 1950 76 41

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