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.
| Bridge | State | Condition | Year Built | Age (Years) | ADT |
|---|---|---|---|---|---|
| WEST BR INDIAN CREEK | Iowa | Fair | 1919 | 107 | 45 |
| BALLARD CREEK | Iowa | Fair | 1919 | 107 | 100 |
| EAST BR INDIAN CREEKH | Iowa | Poor | 1919 | 107 | 15 |
| SKILLET CREEK | Iowa | Poor | 1919 | 107 | 46 |
| WEST BRANCH IOWA RIVER | Iowa | Poor | 1919 | 107 | 11 |
| DES MOINES RIVER | Iowa | Fair | 1920 | 106 | 16,294 |
| WILLOW CREEK | Iowa | Fair | 1920 | 106 | 5,897 |
| DRAINAGE | Iowa | Poor | 1920 | 106 | 242 |
| DRAINAGE | Iowa | Poor | 1920 | 106 | 40 |
| DRAINAGE | Iowa | Poor | 1920 | 106 | 144 |
| SMALL STREAM | Iowa | Poor | 1920 | 106 | 349 |
| DREYS DITCH | Iowa | Poor | 1920 | 106 | 787 |
| BREWER CREEK | Iowa | Fair | 1920 | 106 | 377 |
| EAST CEDAR CREEK | Iowa | Fair | 1920 | 106 | 769 |
| CEDAR RIVER | Iowa | Fair | 1920 | 106 | 13,000 |
| E BR WAPSINONOC CREEK | Iowa | Poor | 1920 | 106 | 1,770 |
| MIDDLE RIVER | Iowa | Fair | 1920 | 106 | 30 |
| MIDDLE NODAWAY RIVER | Iowa | Poor | 1920 | 106 | 30 |
| STREAM | Iowa | Fair | 1920 | 106 | 11 |
| CREEK | Iowa | Poor | 1920 | 106 | 60 |
| TRIB TO WAPSIPINICON RVR | Iowa | Fair | 1920 | 106 | 49 |
| BEAVER CREEK | Iowa | Fair | 1920 | 106 | 139 |
| BIG CREEK | Iowa | Fair | 1920 | 106 | 71 |
| BEAVER CREEK | Iowa | Poor | 1920 | 106 | 26 |
| BEAVER CREEK | Iowa | Poor | 1920 | 106 | 20 |
| BEAVER CREEK | Iowa | Poor | 1920 | 106 | 20 |
| IOWAY CREEK | Iowa | Poor | 1920 | 106 | 20 |
| BLUFF CREEK | Iowa | Poor | 1920 | 106 | 30 |
| BR RACCOON RIVER | Iowa | Poor | 1920 | 106 | 20 |
| WEST FORK CEDAR RIVER | Iowa | Poor | 1920 | 106 | 79 |
| INDIAN CREEK | Iowa | Poor | 1920 | 106 | 26 |
| ROCK RUN CR | Iowa | Poor | 1920 | 106 | 50 |
| BR ROCK CR | Iowa | Poor | 1920 | 106 | 15 |
| N PIERSON CREEK | Iowa | Poor | 1920 | 106 | 20 |
| GREY CREEK | Iowa | Poor | 1920 | 106 | 45 |
| PANTHER CREEK | Iowa | Poor | 1920 | 106 | 10 |
| ELK CREEK | Iowa | Poor | 1920 | 106 | 25 |
| STREAM | Iowa | Poor | 1920 | 106 | 21 |
| STREAM | Iowa | Poor | 1920 | 106 | 11 |
| COON CREEK | Iowa | Fair | 1920 | 106 | 82 |
| COX CREEK | Iowa | Poor | 1920 | 106 | 30 |
| HEWETT CREEK | Iowa | Poor | 1920 | 106 | 51 |
| STREAM | Iowa | Fair | 1920 | 106 | 619 |
| SM STREAM | Iowa | Poor | 1920 | 106 | 11 |
| BLOODY RUN | Iowa | Fair | 1920 | 106 | 108 |
| CREEK | Iowa | Fair | 1920 | 106 | 21 |
| BRANCH BEAVER CREEK | Iowa | Fair | 1920 | 106 | 46 |
| FROG CREEK | Iowa | Fair | 1920 | 106 | 428 |
| SOAP CREEK | Iowa | Poor | 1920 | 106 | 110 |
| JONATHAN CREEK | Iowa | Poor | 1920 | 106 | 29 |
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.