Ill 100 over Walnut Creek
Scott County, Illinois · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Ill 100 over Walnut Creek in Scott 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 1984, making it 41 years old at the 2025 inventory.
- It carries about 1,000 vehicles a day (traffic count year 2021).
- Its listed owner is the state highway agency.
- It is one of 54 of the 99 inventoried bridges in Scott County rated good (54.5%); 7 (7.1%) 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 → (39.64887, -90.57509)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 7 | Good condition |
| Substructure | 7 | Good condition |
Bridge details
| Structure | Continuous steel stringer or multi-beam girder |
| Length | about 235 ft |
| Location | 1.5MI N JCTIL100&106 |
| NBI structure number | 086003900000000 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Illinois department of transportation.
Busiest bridges in Scott County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 72 over Tr 44 | 1987 | 9,900 | Good |
| Fai 72 over Drainage Ditch | 1986 | 9,900 | Fair |
| Fai 72 EB over Ill 100 | 1981 | 4,950 | Fair |
| Fai 72 WB over Ill 100 | 1981 | 4,950 | Fair |
| Fai 72 EB over Tr 55 | 1986 | 4,950 | Good |
| Fai 72 WB over Tr 55 | 1986 | 4,950 | Good |
All bridges nearby: Scott County, IL bridge conditions · every bridge in Scott County · Illinois bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.