Fas 863 over Rockcastle Creek
Randolph County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Fas 863 over Rockcastle Creek in Randolph 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 1948, making it 77 years old at the 2025 inventory.
- It carries about 1,450 vehicles a day (traffic count year 2024).
- Its listed owner is the county highway agency.
- It is one of 52 of the 149 inventoried bridges in Randolph County rated fair (34.9%); 10 (6.7%) 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 → (37.9647, -89.66078)
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 33 ft |
| Location | 863 over Rockcastle |
| NBI structure number | 079319300000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Randolph County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 3 over Black Creek | 1995 | 8,400 | Good |
| Ill 150 over Miss Riv/fau 9416 | 1942 | 6,250 | Poor |
| Il 3 over UPRR | 1971 | 5,650 | Good |
| Il 3 over Nine Mile Creek | 2024 | 5,650 | Good |
| Ill 4-150 over Marys River | 1928 | 5,500 | Fair |
| Il 150 over Little Marys River | 1999 | 5,450 | Good |
All bridges nearby: Randolph County, IL bridge conditions · every bridge in Randolph County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.