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 BR CHICAGO RIVER | Illinois | Fair | 1919 | 107 | 9,700 |
| N BR CHICAGO RIV | Illinois | Fair | 1919 | 107 | 13,700 |
| E FORK OF BIG CREEK | Illinois | Poor | 1919 | 107 | 75 |
| LILLY CREEK | Illinois | Poor | 1919 | 107 | 10 |
| SECOND CREEK | Illinois | Fair | 1919 | 107 | 4,450 |
| BRANCH OF TILTON CR. | Illinois | Poor | 1919 | 107 | 50 |
| TRIB OF SPRING CR | Illinois | Poor | 1919 | 107 | 50 |
| MIDDLE FORK PLUM RIV | Illinois | Fair | 1919 | 107 | 75 |
| SHORT POINT CREEK | Illinois | Fair | 1919 | 107 | 1,000 |
| APPLE CREEK | Illinois | Fair | 1919 | 107 | 425 |
| GIRDER BR | Illinois | Poor | 1919 | 107 | 2,650 |
| IL RIVER TRIB | Illinois | Poor | 1919 | 107 | 200 |
| FANCY CREEK | Illinois | Poor | 1919 | 107 | 2,450 |
| SPOON RIVER | Illinois | Good | 1919 | 107 | 25 |
| YELLOW CREEK | Illinois | Poor | 1919 | 107 | 950 |
| BR BEAVER POND CREEK | Illinois | Fair | 1919 | 107 | 475 |
| PLUM CR | Illinois | Fair | 1919 | 107 | 3,500 |
| KEITH CREEK | Illinois | Poor | 1919 | 107 | 375 |
| TRIB OF SHOAL CK | Illinois | Poor | 1920 | 106 | 50 |
| MISSOURI CREEK | Illinois | Poor | 1920 | 106 | 75 |
| W. BUREAU CR. | Illinois | Fair | 1920 | 106 | 125 |
| BRANCH OF POND CREEK | Illinois | Fair | 1920 | 106 | 100 |
| OTTER CREEK | Illinois | Fair | 1920 | 106 | 50 |
| BRANCH OF ELKHORN CR | Illinois | Fair | 1920 | 106 | 150 |
| BNSF RR | Illinois | Poor | 1920 | 106 | 50 |
| LOCUST CREEK | Illinois | Fair | 1920 | 106 | 500 |
| CLEAR CREEK | Illinois | Poor | 1920 | 106 | 150 |
| BRUSH CREEK | Illinois | Fair | 1920 | 106 | 100 |
| COTTONWOOD BRANCH | Illinois | Fair | 1920 | 106 | 50 |
| ACHENBACH BRANCH | Illinois | Poor | 1920 | 106 | 50 |
| THORN CREEK | Illinois | Fair | 1920 | 106 | 6,150 |
| ADDISON CREEK | Illinois | Fair | 1920 | 106 | 4,100 |
| MAIN BR CHICAGO RIV | Illinois | Poor | 1920 | 106 | 16,550 |
| MAIN BR CHICAGO RIV | Illinois | Poor | 1920 | 106 | 24,300 |
| N BR CHICAGO RIVER | Illinois | Fair | 1920 | 106 | 19,100 |
| VARIOUS CITY STS | Illinois | Fair | 1920 | 106 | 24,300 |
| UNION STATION TRACKS | Illinois | Fair | 1920 | 106 | 6,200 |
| TRIB TO POPLAR CR | Illinois | Fair | 1920 | 106 | 11,800 |
| DRAINAGE DITCH | Illinois | Fair | 1920 | 106 | 50 |
| E FORK OF BIG CREEK | Illinois | Poor | 1920 | 106 | 50 |
| FLAT CREEK | Illinois | Fair | 1920 | 106 | 50 |
| LITTLE CREEK | Illinois | Fair | 1920 | 106 | 125 |
| STREAM | Illinois | Poor | 1920 | 106 | 25 |
| DRAINAGE DITCH | Illinois | Poor | 1920 | 106 | 125 |
| TURNER CREEK | Illinois | Poor | 1920 | 106 | 125 |
| MUD CREEK | Illinois | Poor | 1920 | 106 | 75 |
| SHAVETAIL CR | Illinois | Fair | 1920 | 106 | 50 |
| TRIB LITTLE MUD CK | Illinois | Poor | 1920 | 106 | 50 |
| CRABORCHARD CREEK | Illinois | Poor | 1920 | 106 | 3,500 |
| DAVIS CREEK | Illinois | Poor | 1920 | 106 | 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.