N 31st RD (ms1998) over I-39/US 51
Fair Condition49 years old150 vehicles/day
Location
| State | Illinois |
| County | LaSalle |
| Location | 1 Mile North Of I-80 |
| Carries | N 31st RD (ms1998) |
| Crosses | I-39/US 51 |
| Coordinates | 41.38277, -89.05766 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 7 (Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Scour Critical | Not applicable |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 257.5 ft (78.5 m) |
| Max Span | 104.3 ft (31.8 m) |
| Deck Width | 29.9 ft (9.1 m) |
| Deck Area | 714.4 sq m |
| Main Spans | 2 |
| Year Built | 1977 |
Traffic
| Avg Daily Traffic | 150 (2020) |
| Truck Traffic | 12% |
| Lanes On Bridge | 2 |
| Lanes Under Bridge | 4 |
Inspection & Ownership
| Last Inspection | 323 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 050017600000000 |