Dearborn ST over Main Br Chicago Riv
Fair Condition63 years old5,600 vehicles/day
Location
| State | Illinois |
| County | Cook |
| Location | 100 W & 307 N |
| Carries | Dearborn ST |
| Crosses | Main Br Chicago Riv |
| Coordinates | 41.88740, -87.62951 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 5 (Fair) |
| Substructure | 6 (Satisfactory) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel |
| Design | Movable - Bascule |
| Total Length | 340.9 ft (103.9 m) |
| Max Span | 234.9 ft (71.6 m) |
| Deck Width | 86.0 ft (26.2 m) |
| Deck Area | 2722.2 sq m |
| Main Spans | 1 |
| Year Built | 1963 |
Traffic
| Avg Daily Traffic | 5,600 (2022) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 924 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 016601400000000 |