Rockwell Rd over Vermilion River
LaSalle County, Illinois · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Rockwell Rd over Vermilion River in LaSalle County, Illinois, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1940 and reconstructed in 2010, making it 85 years old at the 2025 inventory.
- It carries about 250 vehicles a day (traffic count year 2020).
- Its listed owner is a city or municipal highway agency.
- It is one of 75 of the 528 inventoried bridges in LaSalle County rated poor (14.2%); 75 (14.2%) are rated poor.
- Its traffic status in the 2025 inventory is closed to all traffic (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated August 2021, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- 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 → (41.32789, -89.0834)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 4 | 4 | Poor condition |
Bridge details
| Structure | Steel deck truss |
| Length | about 158 ft |
| Location | E of Union St |
| NBI structure number | 050650200000000 |
| Condition class | Poor |
| Traffic status (item 41) | Closed to all traffic |
| Last inspection (item 90) | August 2021 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
| Fracture critical (item 92A) | Yes |
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.