US 34 over Trib to Cedar CR
Warren County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 34 over Trib to Cedar CR in Warren County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1979, making it 46 years old at the 2025 inventory.
- It carries about 8,050 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 49 of the 199 inventoried bridges in Warren County rated fair (24.6%); 15 (7.5%) 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 → (40.92526, -90.56416)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 5 | Fair condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 26 ft |
| Location | 4 Mi E of Monmouth |
| NBI structure number | 094200200000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Warren County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 34 Il 164 Il 1 over Cedar CR Trib | 1964 | 9,450 | Poor |
| US 34 over Cedar Creek Trib | 1985 | 8,950 | Poor |
| US 34 over Tr 206 (150TH St) | 1985 | 8,950 | Fair |
| US 34 over Trib to Cedar CR | 1986 | 8,950 | Fair |
| US 34 over Trib to Cedar CR | 1986 | 8,950 | Fair |
| US 34 over Cedar Creek | 2023 | 8,950 | Good |
All bridges nearby: Warren County, IL bridge conditions · every bridge in Warren County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.