US 51 (fap 322) over Louse Run Tributary
Marion County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 51 (fap 322) over Louse Run Tributary in Marion County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1920 and reconstructed in 1958, making it 105 years old at the 2025 inventory.
- It carries about 2,750 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 90 of the 294 inventoried bridges in Marion County rated fair (30.6%); 22 (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 → (38.71612, -89.09566)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 6 | Satisfactory condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete slab |
| Length | about 25 ft |
| Location | 7.5 Mi S Fayette C L |
| NBI structure number | 061000300000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Marion County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai-57 over Raccoon Creek | 1966 | 21,000 | Good |
| Fai-57 over Br E Fork Kaskaskia | 1970 | 18,100 | Good |
| Fai-57 over S Trib E Br Kask Rvr | 1969 | 18,100 | Good |
| Fai-57 over N Trib E Br Kask Rvr | 1969 | 18,100 | Good |
| US 50 over Vermillion Creek | 1994 | 10,300 | Good |
| Fai-57 NB over Crooked Creek | 1968 | 9,650 | Poor |
All bridges nearby: Marion County, IL bridge conditions · every bridge in Marion County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.