US 24/ Il 78 over Big Sister CR
Fulton County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US 24/ Il 78 over Big Sister CR in Fulton County, Illinois, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2014, making it 11 years old at the 2025 inventory.
- It carries about 3,750 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 45 of the 209 inventoried bridges in Fulton County rated good (21.5%); 44 (21.1%) 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 → (40.39831, -90.06373)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 93 ft |
| Location | 1.7 Mi SW Il 78 Wye |
| NBI structure number | 029007400000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Fulton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 24 / Il 9 over Copperas CR | 2022 | 7,750 | Fair |
| US 136 over Lacy Ditch | 1936 | 5,250 | Fair |
| US 136 over Illinois River | 1936 | 5,250 | Poor |
| Ill 9 over Big Creek | 1997 | 4,100 | Fair |
| Ill 78 over W.br Copperas C | 1929 | 3,800 | Poor |
| Ill 78 over Mid Br Copperas CR | 1964 | 3,800 | Fair |
All bridges nearby: Fulton County, IL bridge conditions · every bridge in Fulton County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.