NB I-155 over Mackinaw River
Poor Condition56 years old6,900 vehicles/day
Location
| State | Illinois |
| County | Tazewell |
| Location | 1mi N Jct I-155 /122 |
| Carries | NB I-155 |
| Crosses | Mackinaw River |
| Coordinates | 40.43907, -89.46655 |
Condition Ratings
| Overall Condition | Poor |
| Deck | 4 (Poor) |
| Superstructure | 3 (Serious) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 549.9 ft (167.6 m) |
| Max Span | 140.1 ft (42.7 m) |
| Deck Width | 42.0 ft (12.8 m) |
| Deck Area | 2145.3 sq m |
| Main Spans | 6 |
| Year Built | 1970 |
Traffic
| Avg Daily Traffic | 6,900 (2023) |
| Truck Traffic | 17% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 324 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 090010000000000 |