Il 100 over Drainage
Jersey County, Illinois · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Il 100 over Drainage in Jersey County, Illinois, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1935, making it 90 years old at the 2025 inventory.
- It carries about 775 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 43 of the 113 inventoried bridges in Jersey County rated fair (38.1%); 6 (5.3%) 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 → (38.98599, -90.54411)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Continuous concrete culvert |
| Length | about 23 ft |
| Location | 0.2 Mi S of 042-2001 |
| NBI structure number | 042245100000000 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Jersey County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 67 SB over Piasa Creek | 2012 | 12,100 | Good |
| US 67 NB over Piasa Creek | 2012 | 12,100 | Good |
| US 67 over De Arcy Creek | 1921 | 5,300 | Fair |
| Il 100 (NB) over Piasa Creek | 1997 | 5,150 | Fair |
| Ill 100 (SB) over Piasa Creek | 1997 | 5,150 | Good |
| Ill 100 over Elsah Creek | 1961 | 4,150 | Poor |
All bridges nearby: Jersey County, IL bridge conditions · every bridge in Jersey County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.