Il 71 over Vermilion River
LaSalle County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Il 71 over Vermilion River in LaSalle County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 2006, making it 19 years old at the 2025 inventory.
- It carries about 2,200 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 255 of the 528 inventoried bridges in LaSalle County rated fair (48.3%); 75 (14.2%) are rated poor.
- 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 → (41.31302, -89.06752)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 5 | Fair condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 354 ft |
| Location | 3.2 Mi W of Il 178 |
| NBI structure number | 050024200000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in LaSalle County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-80 EB & WB over Clark Run Creek | 2004 | 29,300 | Good |
| Ill 71 and Ill 23 over Il Rv & Acc Rd | 1981 | 22,900 | Fair |
| I-39 US 51 over Il Rv/il 351/ Bo RR | 1984 | 19,400 | Fair |
| I-39/US 51 over Conveyor Belt/pvt Rd | 1985 | 19,400 | Fair |
| I-39 over SE Half Conveyor B | 1961 | 19,400 | Fair |
| I-39 US 51 over Stream | 1989 | 19,400 | Good |
All bridges nearby: LaSalle County, IL bridge conditions · every bridge in LaSalle County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.