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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
CLEAR CREEK Iowa Poor 1905 121 15
SMALL STREAM Iowa Poor 1905 121 34
STREAM Iowa Poor 1905 121 35
CEDAR RIVER Iowa Fair 1906 120 1,629
JACK CREEK Iowa Poor 1906 120 11
PRAIRIE CREEK Iowa Poor 1906 120 110
BUTLER CREEK Iowa Poor 1907 119 1,027
LITTLE SIOUX RIVER Iowa Poor 1907 119 26
BOONE RIVER Iowa Poor 1907 119 40
SOUTH BRANCH SALT CREEK Iowa Poor 1907 119 26
CANOE CREEK Iowa Poor 1908 118 49
LITTLE CEDAR RIVER Iowa Poor 1908 118 33
SMALL DITCH Iowa Fair 1908 118 180
CEDAR RIVER Iowa Poor 1909 117 4,971
DES MOINES RIVER Iowa Poor 1909 117 80
CREEK Iowa Fair 1909 117 103
HAIGHT CREEK Iowa Fair 1909 117 60
NUTTING CREEK Iowa Poor 1909 117 44
WAPSIPINICON RIVER Iowa Poor 1909 117 78
NORTH RIVER Iowa Poor 1909 117 26
DRAINAGE Iowa Poor 1910 116 104
KEMP CREEK Iowa Poor 1910 116 20
LIME CR Iowa Poor 1910 116 16
BEAVER CREEK Iowa Poor 1910 116 21
FLOOD CREEK Iowa Poor 1910 116 26
SMALL STREAM Iowa Poor 1910 116 21
STREAM Iowa Poor 1910 116 73
CREEK Iowa Fair 1910 116 35
TRIB OF WELDON RIVER Iowa Poor 1910 116 5
STREAM Iowa Fair 1910 116 15
HAWKEYE CREEK Iowa Poor 1910 116 11
BRUSHY CK Iowa Poor 1910 116 60
SMALL Iowa Fair 1910 116 120
OTTER CREEK Iowa Poor 1910 116 26
TOM CREEK Iowa Poor 1910 116 29
BRUSH CREEK Iowa Poor 1910 116 41
BRANCH N SKUNK RIVER Iowa Poor 1910 116 82
SALT CREEK Iowa Poor 1910 116 15
WOLF CREEK Iowa Poor 1910 116 20
HONEY CREEK Iowa Fair 1910 116 11
W F 102 RIVER Iowa Poor 1910 116 15
CREEK Iowa Fair 1910 116 39
RALSTON CREEK Iowa Poor 1910 116 2,487
RALSTON CREEK Iowa Poor 1910 116 754
SPRING CREEK Iowa Poor 1910 116 5
SPRING CREEK Iowa Fair 1910 116 5
DES MOINES RIVER Iowa Poor 1911 115 3,844
RALSTON CREEK Iowa Poor 1911 115 2,176
CRANE CREEK Iowa Poor 1911 115 29
DM RIVER Iowa Poor 1911 115 60

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