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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
EAST FORK CROOKED CREEK Iowa Poor 1914 112 16
BEAR CREEK Iowa Poor 1914 112 45
BEAR CREEK Iowa Poor 1914 112 63
CLEAR CREEK Iowa Poor 1914 112 40
INDIAN CREEK Iowa Poor 1914 112 20
RAINES BR Iowa Fair 1914 112 15
STREAM Iowa Fair 1914 112 30
N LIZARD CREEK Iowa Poor 1914 112 11
CAMP CREEK Iowa Poor 1914 112 26
DRAINAGE DITCH Iowa Poor 1914 112 459
SMALL STREAM Iowa Poor 1914 112 45
SILVER CREEK Iowa Fair 1914 112 41
IOWA RIVER Iowa Poor 1914 112 39
WOLF CREEK BRANCH Iowa Poor 1914 112 196
LITTLE SOAP CREEK Iowa Poor 1914 112 11
SOUTH FORK LONG CREEK Iowa Poor 1914 112 11
WHITE FOX CREEK Iowa Poor 1914 112 35
RACCOON R & TRAIL Iowa Fair 1915 111 7,253
N FORK MAQUOKETA RIVER Iowa Fair 1915 111 2,428
MINERS CREEK Iowa Poor 1915 111 4
FROG CREEK Iowa Poor 1915 111 536
SHELL ROCK RIVER Iowa Fair 1915 111 3,435
LITTLE BIG CREEK Iowa Poor 1915 111 232
DRAINAGE Iowa Poor 1915 111 1,054
NAGLE CREEK Iowa Poor 1915 111 45
IOWA RIVER Iowa Poor 1915 111 10,950
DRY CREEK Iowa Poor 1915 111 10,953
BUSH BRANCH Iowa Fair 1915 111 11
MIDDLE RIVER Iowa Fair 1915 111 5
MIDDLE RIVER Iowa Fair 1915 111 30
NORTH RIVER Iowa Fair 1915 111 35
MIDDLE RIVER Iowa Poor 1915 111 29
PAINT CREEK Iowa Poor 1915 111 60
BR PATTERSON CREEK Iowa Fair 1915 111 29
CLEAR CREEK Iowa Poor 1915 111 5
LITTLE BEAVER CREEK Iowa Poor 1915 111 40
BEAVER CREEK Iowa Poor 1915 111 20
BIG CREEK Iowa Poor 1915 111 50
BIG CREEK Iowa Fair 1915 111 51
BIG CREEK Iowa Poor 1915 111 25
PRAIRIE CREEK Iowa Poor 1915 111 30
BEAVER CREEK Iowa Poor 1915 111 5
BEAVER CREEK Iowa Poor 1915 111 11
MONTGOMERY CREEK Iowa Poor 1915 111 5
MONTGOMERY CREEK Iowa Poor 1915 111 15
BLUFF CREEK Iowa Poor 1915 111 50
CREEK Iowa Poor 1915 111 39
STREAM Iowa Poor 1915 111 15
COLD WATER CREEK Iowa Poor 1915 111 30
ELKHORN CREEK (LITTLE) Iowa Poor 1915 111 35

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