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 |
|---|---|---|---|---|---|
| SO BR LT MISSOURI | Illinois | Poor | 1900 | 126 | 75 |
| BR OF CROW CR | Illinois | Good | 1900 | 126 | 75 |
| SPOON RIVER | Illinois | Poor | 1900 | 126 | 35 |
| STREAM | Illinois | Fair | 1900 | 126 | 75 |
| SALT FORK TRIB | Illinois | Good | 1900 | 126 | 400 |
| Trib. to Big Ditch | Illinois | Good | 1900 | 126 | 275 |
| STREAM | Illinois | Poor | 1900 | 126 | 100 |
| STREAM | Illinois | Fair | 1900 | 126 | 50 |
| SALINE BRANCH | Illinois | Fair | 1900 | 126 | 350 |
| STREAM | Illinois | Fair | 1900 | 126 | 225 |
| BONEYARD CREEK | Illinois | Poor | 1900 | 126 | 225 |
| BONEYARD CREEK | Illinois | Fair | 1900 | 126 | 5,500 |
| BONEYARD CREEK | Illinois | Fair | 1900 | 126 | 300 |
| BONEYARD CREEK | Illinois | Fair | 1900 | 126 | 3,000 |
| STREAM | Illinois | Poor | 1900 | 126 | 50 |
| PHINNEY BRANCH | Illinois | Good | 1900 | 126 | 900 |
| CLEAR CREEK | Illinois | Fair | 1900 | 126 | 50 |
| CREEK | Illinois | Poor | 1900 | 126 | 50 |
| BUCKHART CREEK | Illinois | Poor | 1900 | 126 | 20 |
| DELMAN BRANCH | Illinois | Fair | 1900 | 126 | 100 |
| RIO BUENA VISTA | Illinois | Good | 1900 | 126 | 350 |
| OAK BRANCH | Illinois | Poor | 1900 | 126 | 20 |
| BUCKHART CREEK | Illinois | Poor | 1900 | 126 | 20 |
| CLEAR CREEK | Illinois | Poor | 1900 | 126 | 35 |
| COTTON CREEK | Illinois | Fair | 1900 | 126 | 150 |
| CLEAR CREEK | Illinois | Poor | 1900 | 126 | 20 |
| LOCUST CREEK | Illinois | Poor | 1900 | 126 | 20 |
| BIG GEORGE BRANCH | Illinois | Poor | 1900 | 126 | 10 |
| BIG GEORGE BRANCH | Illinois | Fair | 1900 | 126 | 225 |
| LAKE FORK | Illinois | Fair | 1900 | 126 | 20 |
| WILLOW CREEK | Illinois | Poor | 1900 | 126 | 35 |
| WILLOW BRANCH | Illinois | Poor | 1900 | 126 | 50 |
| SPRINGSIDE BRANCH | Illinois | Poor | 1900 | 126 | 1,100 |
| LAKE PANA | Illinois | Fair | 1900 | 126 | 1,100 |
| S. FORK SANGAMON R. | Illinois | Poor | 1900 | 126 | 25 |
| S. FORK SANGAMON R. | Illinois | Poor | 1900 | 126 | 25 |
| SPRING BRANCH | Illinois | Fair | 1900 | 126 | 50 |
| SKAGGS CREEK | Illinois | Fair | 1900 | 126 | 35 |
| CLEAR CREEK | Illinois | Poor | 1900 | 126 | 20 |
| DES PLAINES RIVER | Illinois | Fair | 1900 | 126 | 10,550 |
| SALT CREEK | Illinois | Fair | 1900 | 126 | 26,600 |
| WHEELING DRN DTCH | Illinois | Fair | 1900 | 126 | 24,900 |
| SALT CREEK | Illinois | Good | 1900 | 126 | 25,200 |
| BUTTERFIELD CREEK | Illinois | Good | 1900 | 126 | 5,550 |
| SALT CREEK | Illinois | Good | 1900 | 126 | 15,400 |
| 26TH ST CONNECTION | Illinois | Poor | 1900 | 126 | 100 |
| MIDLOTHIAN CREEK | Illinois | Fair | 1900 | 126 | 5,250 |
| MARLEY CR | Illinois | Fair | 1900 | 126 | 7,500 |
| N FORK SALT CREEK | Illinois | Fair | 1900 | 126 | 50 |
| COON CREEK | Illinois | Poor | 1900 | 126 | 50 |
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.