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
E BRANCH W. NISH. RIVER Iowa Poor 1920 106 26
W NISHNABOTNA RIVER Iowa Fair 1920 106 26
BALLARD CREEK Iowa Poor 1920 106 60
SKUNK RIVER Iowa Poor 1920 106 100
RICHLAND CREEK Iowa Fair 1920 106 33
SUGAR CREEK Iowa Fair 1920 106 44
OTTER CREEK Iowa Poor 1920 106 5
BR SUGAR CREEK Iowa Poor 1920 106 29
BRANCH SUGAR CREEK Iowa Poor 1920 106 29
W BRANCH 102 RIVER Iowa Poor 1920 106 15
TRIB DES MOINES RIVER Iowa Poor 1920 106 45
SPRING CREEK Iowa Poor 1920 106 26
MILL BRANCH Iowa Poor 1920 106 82
STREAM Iowa Poor 1920 106 60
DRAINAGE DITCH 14 Iowa Fair 1920 106 46
DRAINAGE DITCH 9 Iowa Poor 1920 106 11
LOCAL CREEK Iowa Fair 1920 106 120
BEEDS CREEK Iowa Fair 1920 106 2,468
STREAM Iowa Fair 1920 106
STREAM Iowa Fair 1920 106
RED ROCK POOL Iowa Fair 1920 106 10
METZ CREEK Iowa Fair 1921 105 2,390
DRAINAGE DITCH Iowa Fair 1921 105 669
WOLF CREEK Iowa Fair 1921 105 2,850
STREAM Iowa Fair 1921 105 2,360
SHELL ROCK RIVER Iowa Fair 1921 105 2,160
BUCK CREEK Iowa Poor 1921 105 29
BR LITTLE SIOUX RIVER Iowa Poor 1921 105 11
BIG CEDAR CR D D 181 Iowa Fair 1921 105 20
MAPLE RIVER Iowa Poor 1921 105 11
PITCHER CREEK Iowa Poor 1921 105 20
CREEK Iowa Fair 1921 105 51
ELK CREEK Iowa Poor 1921 105 15
GUNDLACH CR Iowa Poor 1921 105 29
STREAM Iowa Fair 1921 105 26
WEST BEAVER CREEK Iowa Poor 1921 105 300
CREEK Iowa Fair 1921 105 147
DRAINAGE DITCH Iowa Fair 1921 105 529
SMALL STREAM Iowa Poor 1921 105 104
SNIPE CREEK Iowa Poor 1921 105 51
SMALL STREAM Iowa Poor 1921 105 26
PRAIRIE CREEK Iowa Poor 1921 105 51
OTTER CR Iowa Poor 1921 105 16
BURNETT CREEK Iowa Poor 1921 105 69
LIZARD CREEK Iowa Poor 1921 105 21
DD 175 Iowa Fair 1921 105 5
N LIZARD CREEK Iowa Poor 1921 105 20
RACCOON RIVER Iowa Poor 1921 105 45
CREEK Iowa Fair 1921 105 150
IOWA RIVER Iowa Fair 1922 104 1,698

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.