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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
BRUSH CREEK Iowa Poor 1920 106 21
STREAM Iowa Fair 1920 106 26
LINDSEY CREEK Iowa Poor 1920 106 20
LITTLE FLINT CREEK Iowa Fair 1920 106 113
LITTLE SIOUX Iowa Poor 1920 106 31
CREEK Iowa Poor 1920 106 310
UNAMED CREEK Iowa Poor 1920 106 11
HAUGH CREEK Iowa Poor 1920 106 33
SMALL DRY RUN Iowa Poor 1920 106 380
MILL CREEK Iowa Poor 1920 106 15
DRAINAGE #10 Iowa Poor 1920 106 5
STREAM Iowa Fair 1920 106 15
BEAVER CREEK Iowa Poor 1920 106 11
MASON CREEK Iowa Poor 1920 106 11
TRIB. TO TROUBLESOME Iowa Poor 1920 106 60
TRIB. TO TROUBLESOME Iowa Poor 1920 106 20
STREAM Iowa Poor 1920 106 15
SMALL CREEK Iowa Poor 1920 106 26
DRAINAGE DITCH Iowa Poor 1920 106 34
STREAM Iowa Poor 1920 106 —
MOSQUITO CREEK Iowa Poor 1920 106 120
PIGEON CREEK Iowa Poor 1920 106 40
CRANE CREEK Iowa Poor 1920 106 63
CONVEY CREEK Iowa Poor 1920 106 100
SMALL STREAM Iowa Poor 1920 106 30
SMALL CREEK Iowa Poor 1920 106 20
BIG SLOUGH CR Iowa Fair 1920 106 35
BR DIRTY FACE CR Iowa Fair 1920 106 61
BR OLD MANS CR Iowa Poor 1920 106 92
N BR CREEK Iowa Fair 1920 106 26
SMALL STREAM Iowa Poor 1920 106 11
OTTER CREEK Iowa Poor 1920 106 30
STREAM Iowa Poor 1920 106 21
NORTH RIVER Iowa Fair 1920 106 60
NORTH RIVER Iowa Fair 1920 106 40
BRANCH SNIPE CREEK Iowa Poor 1920 106 11
SNIPE CREEK Iowa Poor 1920 106 20
BRANCH N TIMBER CREEK Iowa Poor 1920 106 30
CREEK Iowa Fair 1920 106 21
LOCAL CREEK Iowa Fair 1920 106 29
BURR OAK CREEK Iowa Fair 1920 106 15
CREEK Iowa Fair 1920 106 26
ROCK CREEK Iowa Fair 1920 106 44
DRAINAGE DITCH(SDB) Iowa Poor 1920 106 10
DRAINAGE DITCH #29 Iowa Poor 1920 106 26
MUD CREEK Iowa Poor 1920 106 50
STREAM Iowa Poor 1920 106 11
SMALL STREAM Iowa Fair 1920 106 34
RACOON RIVER Iowa Poor 1920 106 120
DD #71 Iowa Poor 1920 106 20

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