I-255 over Nsrr
St. Clair County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-255 over Nsrr in St. Clair County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- It was built in 1980, making it 45 years old at the 2025 inventory.
- It carries about 41,500 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (38.57879, -90.11269)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 2 | Critical condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 157 ft |
| Location | 0.5 mi S of IL 15 |
| NBI structure number | 082022900000000 |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
All bridges nearby: St. Clair County, IL bridge conditions · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.