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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
BRANCH PANTHER CREEK Iowa Fair 1925 101 21
CREEK Iowa Fair 1925 101 35
SLOUGH Iowa Fair 1925 101 35
BRANCH PANTHER CREEK Iowa Fair 1925 101 72
HONEY CREEK Iowa Fair 1925 101 30
CREEK Iowa Poor 1925 101 30
GRANGER CREEK Iowa Poor 1925 101 45
CREEK Iowa Poor 1925 101 44
UNNAMED CREEK Iowa Fair 1925 101 314
COULEE CREEK Iowa Fair 1925 101 432
DD #110 Iowa Fair 1925 101 11
DRAINAGE DITCH Iowa Poor 1925 101 5
BOONE RIVER Iowa Poor 1925 101 20
BOONE RIVER Iowa Poor 1925 101 36
DD Iowa Poor 1925 101 41
DD Iowa Fair 1925 101 339
DD Iowa Fair 1925 101 15
BR MIDDLE FORK ENGLISH R Iowa Poor 1925 101 11
BRANCH OLD MANS CREEK Iowa Poor 1925 101 71
BUCK CREEK Iowa Poor 1925 101 41
SMALL STREAM Iowa Fair 1925 101 51
SMALL STREAM Iowa Poor 1925 101 21
SMALL STREAM Iowa Poor 1925 101 35
STREAM Iowa Poor 1925 101 11
SAWYER CREEK Iowa Fair 1925 101 1,100
TRIB.TO WAPSIPINICON R Iowa Fair 1925 101 1,424
HAWK RUN Iowa Poor 1925 101 11
STREAM Iowa Poor 1925 101 16
ROCK CREEK Iowa Fair 1925 101 11
LITTLE SIOUX RIVER Iowa Poor 1925 101 159
ROETZEL CREEK Iowa Fair 1925 101 26
LITTLE WATERMAN CR Iowa Fair 1925 101 15
W BR MILL CREEK Iowa Poor 1925 101 26
ENGELS CREEK Iowa Fair 1925 101 199
CYLINDER CREEK Iowa Fair 1925 101 539
MUD CREEK Iowa Poor 1925 101 20
PIGEON CREEK Iowa Poor 1925 101 5
SMALL STREAM Iowa Poor 1925 101 20
SMALL CREEK Iowa Poor 1925 101 34
BOYER VALLEY Iowa Poor 1925 101 34
NO NAME CREEK Iowa Poor 1925 101 249
EAST BR INDIAN CREEK Iowa Fair 1925 101 26
RICHLAND CREEK Iowa Poor 1925 101 26
TWELVE MILE CREEK Iowa Poor 1925 101 39
CREEK Iowa Poor 1925 101 21
N. FORK LONG CREEK Iowa Poor 1925 101 160
SMALL STREAM Iowa Poor 1925 101 270
DEER CREEK Iowa Poor 1925 101 45
DEER CREEK Iowa Poor 1925 101 81
STREAM Iowa Poor 1925 101 120

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