Historic Bridges in Illinois
3,065 bridges built before 1951 in Illinois still in service today.
Bridges Built Before 1951
The United States has 3,065 bridges in Illinois 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 |
|---|---|---|---|---|---|
| N FORK VERMILION RIV | Illinois | Fair | 1940 | 86 | 4,550 |
| CRAWFISH LATERAL | Illinois | Fair | 1940 | 86 | 525 |
| DRAINAGE DITCH | Illinois | Fair | 1940 | 86 | 1,500 |
| ELKHORN CREEK | Illinois | Fair | 1940 | 86 | 1,200 |
| BR LITTLE WABASH | Illinois | Fair | 1940 | 86 | 10 |
| DRAINAGE DITCH | Illinois | Fair | 1940 | 86 | 500 |
| ELKHORN CREEK | Illinois | Fair | 1940 | 86 | 5,300 |
| ELKHORN CREEK | Illinois | Fair | 1940 | 86 | 5,300 |
| ROCK RIVER | Illinois | Fair | 1940 | 86 | 4,900 |
| CREEK | Illinois | Fair | 1940 | 86 | 5,100 |
| STREAM | Illinois | Good | 1940 | 86 | 5,300 |
| DU PAGE RIVER | Illinois | Fair | 1940 | 86 | 17,100 |
| I & M CANAL | Illinois | Poor | 1940 | 86 | 17,100 |
| SPRING BROOK CREEK | Illinois | Good | 1940 | 86 | 7,100 |
| KEITH CREEK | Illinois | Fair | 1940 | 86 | 14,700 |
| KENT CREEK | Illinois | Good | 1940 | 86 | 4,150 |
| PANTHER CR | Illinois | Good | 1940 | 86 | 25 |
| TRIB OF WALNUT CR | Illinois | Fair | 1940 | 86 | 275 |
| HARKNESS CREEK | Illinois | Fair | 1941 | 85 | 4,150 |
| INFIDEL HOLLOW CREEK | Illinois | Good | 1941 | 85 | 550 |
| STREAM | Illinois | Fair | 1941 | 85 | 225 |
| COTTON CREEK | Illinois | Fair | 1941 | 85 | 200 |
| DOYLES CREEK | Illinois | Good | 1941 | 85 | 1,100 |
| LITTLE MUDDY CREEK | Illinois | Poor | 1941 | 85 | 425 |
| BRANCH OF SUGAR CK | Illinois | Good | 1941 | 85 | 575 |
| W BR HURRICANE CREEK | Illinois | Fair | 1941 | 85 | 225 |
| W BR HURRICANE CREEK | Illinois | Fair | 1941 | 85 | 350 |
| W F N BR CHICAGO RIV | Illinois | Poor | 1941 | 85 | 31,700 |
| CALUMET RIVER | Illinois | Fair | 1941 | 85 | 10,600 |
| RR - UP | Illinois | Fair | 1941 | 85 | 4,950 |
| TINLEY CREEK | Illinois | Fair | 1941 | 85 | 4,600 |
| BELMONT AV | Illinois | Poor | 1941 | 85 | 101,600 |
| BENNET CREEK | Illinois | Fair | 1941 | 85 | 775 |
| RANGE CREEK | Illinois | Fair | 1941 | 85 | 475 |
| COON CREEK | Illinois | Fair | 1941 | 85 | 7,300 |
| DRAINAGE DITCH | Illinois | Good | 1941 | 85 | 75 |
| W.BRANCH DU PAGE RV. | Illinois | Poor | 1941 | 85 | 17,600 |
| Stream | Illinois | Poor | 1941 | 85 | 300 |
| SMALL UNNAMED BRANCH | Illinois | Fair | 1941 | 85 | 425 |
| LITTLE CREEK | Illinois | Good | 1941 | 85 | 900 |
| CREEK | Illinois | Good | 1941 | 85 | 375 |
| BRANCH JORDAN CREEK | Illinois | Good | 1941 | 85 | 20 |
| BIG CREEK | Illinois | Fair | 1941 | 85 | 10 |
| DRAINAGE DITCH | Illinois | Good | 1941 | 85 | 325 |
| MACOUPIN CREEK | Illinois | Fair | 1941 | 85 | 2,150 |
| INDIAN CREEK | Illinois | Fair | 1941 | 85 | 17,900 |
| MD FK N BR CHICAGO R | Illinois | Fair | 1941 | 85 | 23,200 |
| BRUMBACH CREEK | Illinois | Fair | 1941 | 85 | 5,250 |
| TURTLE CREEK | Illinois | Good | 1941 | 85 | 12,300 |
| PRAIRIE CREEK | Illinois | Good | 1941 | 85 | 25 |
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.