WB I-74 over E. Main St
Knox County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- WB I-74 over E. Main St in Knox County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1963, making it 62 years old at the 2025 inventory.
- It carries about 9,500 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 123 of the 304 inventoried bridges in Knox County rated fair (40.5%); 32 (10.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: substructure 5 to 6.
- Its most recent inspection on record is dated December 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (40.94686, -90.33384)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 6 | Satisfactory condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 187 ft |
| Location | Galesburg Interch |
| NBI structure number | 048001000000000 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | December 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Knox County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 74 over Spoon Riv Tributary | 1968 | 15,400 | Fair |
| I-74 over Stream | 1967 | 15,000 | Fair |
| US 34 EB over US 150 | 1965 | 12,900 | Fair |
| US 150 (main St) over Cedar Creek BNSF RR | 2012 | 10,300 | Fair |
| EB I-74 over Main (fau 6800) | 1963 | 9,500 | Fair |
| US 34 WB over US 150 | 1965 | 9,100 | Fair |
All bridges nearby: Knox County, IL bridge conditions · every bridge in Knox County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.