Tr 278 over Walnut Creek Trib
Knox County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Tr 278 over Walnut Creek Trib in Knox County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2015, making it 10 years old at the 2025 inventory.
- It carries about 25 vehicles a day (traffic count year 2022).
- Its listed owner is a town or township highway agency.
- It is one of 149 of the 304 inventoried bridges in Knox County rated good (49.0%); 32 (10.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated February 2023, on a 48-month routine inspection cycle.
- A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.
View this bridge on a map → (41.11203, -90.07991)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 69 ft |
| Location | 2 Mi W. of Il. 180 |
| NBI structure number | 048340400000000 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | February 2023 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
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 |
| WB I-74 over E. Main St | 1963 | 9,500 | 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.