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 |
|---|---|---|---|---|---|
| TROLLEY CAR TUNNEL | Illinois | Poor | 1911 | 115 | 4,750 |
| TROLLEY CAR TUNNEL | Illinois | Fair | 1911 | 115 | 18,600 |
| N FORK SALT CREEK | Illinois | Poor | 1911 | 115 | 25 |
| SPRING CREEK | Illinois | Poor | 1911 | 115 | 50 |
| SPRING CREEK | Illinois | Poor | 1911 | 115 | 575 |
| SPRING CREEK | Illinois | Poor | 1911 | 115 | 400 |
| E Trib to Shoal Crk | Illinois | Fair | 1912 | 114 | 600 |
| STREAM | Illinois | Good | 1912 | 114 | 500 |
| IROQUOIS RIVER | Illinois | Fair | 1912 | 114 | 200 |
| RAVINE | Illinois | Poor | 1912 | 114 | 525 |
| MILL RACE | Illinois | Fair | 1912 | 114 | 3,450 |
| SPRING CREEK | Illinois | Poor | 1912 | 114 | 3,100 |
| N BR CHICAGO RIVER | Illinois | Poor | 1913 | 113 | 17,100 |
| S BR CHICAGO RIV | Illinois | Poor | 1913 | 113 | 9,600 |
| N BR CHICAGO RIVER | Illinois | Fair | 1913 | 113 | 1,050 |
| N BR CHICAGO RIV | Illinois | Poor | 1913 | 113 | 3,250 |
| UNION STATION TRACKS | Illinois | Poor | 1913 | 113 | 9,600 |
| RAVINE | Illinois | Poor | 1913 | 113 | 475 |
| WAUKEGAN RIVER | Illinois | Poor | 1913 | 113 | 1,700 |
| MILLER BRANCH | Illinois | Poor | 1914 | 112 | 50 |
| ELM CREEK | Illinois | Fair | 1914 | 112 | 900 |
| LIMESTONE CREEK | Illinois | Fair | 1914 | 112 | 75 |
| EMBARRAS RIVER | Illinois | Poor | 1914 | 112 | 50 |
| N BR CHICAGO RIVER | Illinois | Poor | 1914 | 112 | 19,900 |
| CALUMET RIVER | Illinois | Poor | 1914 | 112 | 11,200 |
| N BR CHICAGO RIVER | Illinois | Fair | 1914 | 112 | 12,900 |
| CREEK | Illinois | Fair | 1914 | 112 | 50 |
| BRANCH OF TILTON CR. | Illinois | Poor | 1914 | 112 | 25 |
| SPRING CR. TRIB. | Illinois | Poor | 1914 | 112 | 200 |
| MUD CR | Illinois | Poor | 1914 | 112 | 25 |
| STREAM | Illinois | Poor | 1914 | 112 | 50 |
| KANKAKEE RIVER | Illinois | Fair | 1914 | 112 | 2,900 |
| MORGAN CREEK | Illinois | Fair | 1914 | 112 | 4,800 |
| RAVINE | Illinois | Fair | 1914 | 112 | 175 |
| RAVINE | Illinois | Poor | 1914 | 112 | 175 |
| HICKORY CREEK | Illinois | Fair | 1914 | 112 | 75 |
| INDIAN CRK. | Illinois | Fair | 1914 | 112 | 75 |
| DITCH | Illinois | Fair | 1914 | 112 | 1,150 |
| MIDDLE FORK SALINE R | Illinois | Fair | 1914 | 112 | 2,900 |
| BRUSH CREEK | Illinois | Poor | 1914 | 112 | 200 |
| HOLMAN CRK. | Illinois | Fair | 1915 | 111 | 100 |
| AVERY BRANCH | Illinois | Fair | 1915 | 111 | 10 |
| MCCURDY BRANCH | Illinois | Poor | 1915 | 111 | 50 |
| W. BUREAU CREEK | Illinois | Poor | 1915 | 111 | 25 |
| LIME CREEK | Illinois | Fair | 1915 | 111 | 75 |
| Masters Fork | Illinois | Poor | 1915 | 111 | 25 |
| BRUSHY BRANCH | Illinois | Poor | 1915 | 111 | 1,300 |
| DURBIN BRANCH | Illinois | Fair | 1915 | 111 | 100 |
| LOWIS BRANCH | Illinois | Fair | 1915 | 111 | 20 |
| GEORGE BRANCH | Illinois | Poor | 1915 | 111 | 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.