US 34 over Rob Roy Creek
Kendall County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 34 over Rob Roy Creek in Kendall County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 8 (very good condition) on the 0-9 scale.
- It was built in 2019, making it 6 years old at the 2025 inventory.
- It carries about 18,700 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 67 of the 131 inventoried bridges in Kendall County rated good (51.1%); 15 (11.5%) 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 → (41.66143, -88.48162)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 8 | Very good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 28 ft |
| Location | 2.05 M W of IL 47 |
| NBI structure number | 047205100000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Kendall County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ill 47 over Fox River | 1984 | 24,800 | Fair |
| US 34/FAP 311 over Waubansee Creek | 2002 | 24,700 | Fair |
| US 34 over Blackberry Creek | 2019 | 22,400 | Good |
| US 34 over Waubansee Creek | 2001 | 22,300 | Fair |
| Orchard Rd over Gates Cr/trib to Fox | 2000 | 18,700 | Fair |
| Orchard Rd over Fox River & Omnitrax | 2000 | 18,700 | Fair |
All bridges nearby: Kendall County, IL bridge conditions · every bridge in Kendall County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.