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 |
|---|---|---|---|---|---|
| UNION PACIFIC RR | Illinois | Good | 1940 | 86 | 1,400 |
| UP RR | Illinois | Good | 1940 | 86 | 400 |
| S BR KISHWAUKEE RIV. | Illinois | Fair | 1940 | 86 | 7,650 |
| STREAM | Illinois | Fair | 1940 | 86 | 375 |
| STREAM | Illinois | Fair | 1940 | 86 | 75 |
| STREAM | Illinois | Fair | 1940 | 86 | 50 |
| STREAM | Illinois | Fair | 1940 | 86 | 50 |
| STREAM | Illinois | Fair | 1940 | 86 | 75 |
| STREAM | Illinois | Fair | 1940 | 86 | 50 |
| LITTLE WABASH RIVER | Illinois | Fair | 1940 | 86 | 600 |
| SUGAR CREEK | Illinois | Fair | 1940 | 86 | 700 |
| SUGAR CREEK | Illinois | Fair | 1940 | 86 | 1,050 |
| RACCOON CREEK | Illinois | Poor | 1940 | 86 | 25 |
| BEAR CREEK | Illinois | Fair | 1940 | 86 | 20 |
| NORTH FORK CREEK | Illinois | Poor | 1940 | 86 | 50 |
| TRIB LITTLE HICKORY | Illinois | Fair | 1940 | 86 | 75 |
| EAST FORK | Illinois | Fair | 1940 | 86 | 75 |
| TOWN BRANCH CREEK | Illinois | Poor | 1940 | 86 | 875 |
| CYPRESS DITCH | Illinois | Poor | 1940 | 86 | 10 |
| Shaffer Hollow Creek | Illinois | Good | 1940 | 86 | 400 |
| Bushnell Hollow | Illinois | Fair | 1940 | 86 | 625 |
| Robley Hollow | Illinois | Good | 1940 | 86 | 400 |
| HURRICANE CREEK | Illinois | Good | 1940 | 86 | 400 |
| STREAM | Illinois | Fair | 1940 | 86 | 400 |
| JOHNNY RUN | Illinois | Poor | 1940 | 86 | 225 |
| TRIB TO HICKS BRANCH | Illinois | Good | 1940 | 86 | 100 |
| MUD CREEK | Illinois | Fair | 1940 | 86 | 75 |
| WALKER CREEK | Illinois | Poor | 1940 | 86 | 50 |
| TRIB VERMILION RIVER | Illinois | Fair | 1940 | 86 | 350 |
| TRIB OF SPRING CR | Illinois | Good | 1940 | 86 | 200 |
| SCRUB CREEK | Illinois | Poor | 1940 | 86 | 225 |
| E FK OF GALENA RIVER | Illinois | Poor | 1940 | 86 | 275 |
| WOLF CREEK | Illinois | Poor | 1940 | 86 | 225 |
| FOX RIVER | Illinois | Fair | 1940 | 86 | 4,300 |
| ILL MICH CANAL | Illinois | Poor | 1940 | 86 | 5,550 |
| HOG RUN CREEK | Illinois | Fair | 1940 | 86 | 300 |
| BR WOLF CREEK | Illinois | Fair | 1940 | 86 | 1,150 |
| VERMILION RIVER | Illinois | Poor | 1940 | 86 | 250 |
| GOOSE CR | Illinois | Poor | 1940 | 86 | 650 |
| BAILEY CR | Illinois | Good | 1940 | 86 | 325 |
| TRIB W FORK MAZON R | Illinois | Fair | 1940 | 86 | 75 |
| W FORK MAZON R | Illinois | Fair | 1940 | 86 | 75 |
| TRIB W F MAZON R | Illinois | Fair | 1940 | 86 | 25 |
| CREEK | Illinois | Fair | 1940 | 86 | 25 |
| DRAINAGE DITCH | Illinois | Poor | 1940 | 86 | 50 |
| DRAINAGE DITCH | Illinois | Poor | 1940 | 86 | 50 |
| DRAINAGE DITCH | Illinois | Fair | 1940 | 86 | 50 |
| DRAINAGE DITCH | Illinois | Fair | 1940 | 86 | 25 |
| LAKE FORK CREEK | Illinois | Fair | 1940 | 86 | 1,400 |
| LAKE FORK CK | Illinois | Fair | 1940 | 86 | 550 |
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.