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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
STREAM (SDB) Iowa Poor 1900 126 10
STREAM (SDB) Iowa Poor 1900 126 10
DRAINAGE (SDB) Iowa Poor 1900 126 10
DRAINAGE (SDB) Iowa Poor 1900 126 10
DRAINAGE (SDB) Iowa Poor 1900 126 10
SMALL STREAM Iowa Poor 1900 126 11
SOUTH WEST CREEK Iowa Poor 1900 126 11
SMALL STREAM Iowa Poor 1900 126 11
STREAM Iowa Poor 1900 126 11
SMALL STREAM Iowa Poor 1900 126 11
PAINT CREEK Iowa Fair 1900 126 10
OVERFLOW IOWA RIVER Iowa Poor 1900 126 320
SMALL Iowa Fair 1900 126 2,992
STREAM Iowa Poor 1900 126 11
DRAINAGE DITCH 125 Iowa Fair 1900 126 60
LAKE MIAMI Iowa Fair 1900 126 5
PITCHER 153 Iowa Poor 1900 126 11
STREAM Iowa Poor 1900 126 20
SMALL CREEK Iowa Fair 1900 126 104
STREAM Iowa Good 1900 126 30
GOAT CREEK Iowa Fair 1900 126 501
BEEDS CREEK Iowa Fair 1900 126 10
SINK CREEK Iowa Poor 1900 126 373
SMALL STREAM Iowa Poor 1900 126 346
SMALL STREAM Iowa Good 1900 126 1,168
LATERAL #77 DD #23 Iowa Fair 1900 126 1,112
PAINT CREEK Iowa Poor 1900 126 120
BACON CREEK Iowa Poor 1900 126 1,664
BACON CREEK Iowa Poor 1900 126 188
PERRY CREEK Iowa Good 1900 126 5,086
MINNOW CREEK Iowa Poor 1900 126 349
BLACKHAWK CR Iowa Fair 1900 126 899
STREAM Iowa Good 1900 126 3,610
STREAM Iowa Fair 1900 126 —
BUFFALO CREEK Iowa Fair 1900 126 —
STREAM Iowa Fair 1900 126 —
BOONE RIVER Iowa Poor 1902 124 62
BEERS CREEK Iowa Poor 1902 124 20
MIDDLE BR WAPSININOC CR Iowa Poor 1904 122 5
SMALL Iowa Fair 1904 122 5
UPPER IOWA RIVER Iowa Poor 1904 122 20
STREAM Iowa Fair 1904 122 154
DRY RUN CREEK Iowa Poor 1905 121 2,673
COLD WATER CREEK Iowa Poor 1905 121 5
LITTLE SIOUX RIVER Iowa Poor 1905 121 41
STREAM Iowa Poor 1905 121 16
SOAP CREEK Iowa Poor 1905 121 70
INDIAN CREEK Iowa Fair 1905 121 5
VOLGA RIVER Iowa Poor 1905 121 15
DM RIVER Iowa Poor 1905 121 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.

All Bridges Poor Condition Scour Critical Bridge Stats