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 |
|---|---|---|---|---|---|
| DES MOINES RIVER | Iowa | Fair | 1948 | 78 | 730 |
| BRANCH MIDDLE RIVER | Iowa | Poor | 1948 | 78 | 15 |
| FOX CREEK | Iowa | Poor | 1948 | 78 | 51 |
| STREAM | Iowa | Poor | 1948 | 78 | 35 |
| COOPER CREEK | Iowa | Poor | 1948 | 78 | 120 |
| STREAM | Iowa | Poor | 1948 | 78 | 30 |
| SMALL STREAM | Iowa | Fair | 1948 | 78 | 70 |
| CREEK | Iowa | Poor | 1948 | 78 | 20 |
| STEIN CK | Iowa | Poor | 1948 | 78 | 15 |
| SPRING CREEK | Iowa | Fair | 1948 | 78 | 39 |
| TRIB TO MILLER CREEK | Iowa | Good | 1948 | 78 | 39 |
| MUD CREEK | Iowa | Poor | 1948 | 78 | 11 |
| MILLER CREEK | Iowa | Fair | 1948 | 78 | 5 |
| TRIB TO BLACK HAWK CREEK | Iowa | Fair | 1948 | 78 | 29 |
| CRANE CREEK | Iowa | Poor | 1948 | 78 | 49 |
| CRANE CREEK | Iowa | Fair | 1948 | 78 | 59 |
| CRANE CREEK | Iowa | Fair | 1948 | 78 | 29 |
| TRIB TO CEDAR RIVER | Iowa | Fair | 1948 | 78 | 29 |
| BEAVER CREEK | Iowa | Fair | 1948 | 78 | 279 |
| TRIB. OF BEAVER CREEK | Iowa | Poor | 1948 | 78 | 279 |
| QUARTER SECTION RUN | Iowa | Poor | 1948 | 78 | 1,188 |
| CREEK | Iowa | Fair | 1948 | 78 | 177 |
| DD 20 | Iowa | Poor | 1948 | 78 | 26 |
| STALE BRANCH | Iowa | Fair | 1948 | 78 | 5 |
| COLD WATER CREEK | Iowa | Fair | 1948 | 78 | 15 |
| PERRY CREEK | Iowa | Poor | 1948 | 78 | 11 |
| PLUM CREEK | Iowa | Poor | 1948 | 78 | 16 |
| WILLOW CREEK | Iowa | Fair | 1948 | 78 | 15 |
| STREAM | Iowa | Fair | 1948 | 78 | 47 |
| BRANCH PANTHER CREEK | Iowa | Fair | 1948 | 78 | 62 |
| VESSER CREEK | Iowa | Fair | 1948 | 78 | 150 |
| HARDIN CREEK | Iowa | Fair | 1948 | 78 | 35 |
| SOUTH FORK BEAVER CREEK | Iowa | Poor | 1948 | 78 | 44 |
| BEAVER CREEK | Iowa | Poor | 1948 | 78 | 11 |
| MIDDLE FORK BEAVER CREEK | Iowa | Poor | 1948 | 78 | 39 |
| TROUBLESOME CREEK | Iowa | Poor | 1948 | 78 | 40 |
| BOONE RIVER | Iowa | Fair | 1948 | 78 | 330 |
| SMALL STREAM | Iowa | Fair | 1948 | 78 | 40 |
| DRAINAGE DITCH | Iowa | Poor | 1948 | 78 | 15 |
| DD | Iowa | Fair | 1948 | 78 | 34 |
| ROCK CREEK | Iowa | Poor | 1948 | 78 | 35 |
| PRAIRIE CREEK | Iowa | Poor | 1948 | 78 | 73 |
| S. SKUNK RIVER | Iowa | Poor | 1948 | 78 | 60 |
| SMALL STREAM | Iowa | Poor | 1948 | 78 | 11 |
| CREEK | Iowa | Fair | 1948 | 78 | 25 |
| STREAM | Iowa | Fair | 1948 | 78 | 30 |
| STREAM | Iowa | Fair | 1948 | 78 | 20 |
| STREAM | Iowa | Poor | 1948 | 78 | 100 |
| COAL CREEK | Iowa | Poor | 1948 | 78 | 15 |
| GRAPE CREEK | Iowa | Fair | 1948 | 78 | 80 |
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.