I-39 US 51 over Stream
LaSalle County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- I-39 US 51 over Stream in LaSalle County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 1989, making it 36 years old at the 2025 inventory.
- It carries about 19,400 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 198 of the 528 inventoried bridges in LaSalle County rated good (37.5%); 75 (14.2%) are rated poor.
- 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 → (41.19897, -89.07667)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 7 | Good condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 30 ft |
| Location | 1.52 Mi S of Ch 54 |
| NBI structure number | 050202200000000 |
| Condition class | Good |
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 |
| US 51 I-39 over Stream | 1988 | 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.