Bridge conditions in Scott County, Illinois
99 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 99 bridges in Scott County: 54 rated good, 38 fair, and 7 poor.
- 7 of the 99 bridges in Scott County, Illinois, are rated in poor condition (7.1%) in the 2025 National Bridge Inventory, as of .
- 54 bridges (54.5%) are rated good and 38 (38.4%) fair.
- The median Scott County bridge was built in 1984.
- The busiest poor-rated bridge is Old US 36 over Walnut Creek (built 1940), carrying about 2,750 vehicles a day.
Good 54.5% · Fair 38.4% · Poor 7.1% of 99 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Old US 36 over Walnut Creek | 1940 | 2,750 | Poor |
| Old US 36 over Fai 72 | 1976 | 2,700 | Poor |
| Il 100/106 over Illinois River | 1929 | 1,850 | Poor |
| Ch 9 over Big Sandy Creek | 1987 | 400 | Poor |
| Ch 5 over Little Sandy Creek | 1968 | 150 | Poor |
| Old Old US 36 over Lewis Creek | 1923 | 75 | Poor |
| Tr 160 over Sandy Creek/tr 18 | 1986 | 75 | Poor |
Busiest bridges in the 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 |
| Fai 72 EB over Drainage Ditch | 1986 | 4,950 | Good |
| Fai 72 WB over Drainage Ditch | 1986 | 4,950 | Fair |
| I-72/US 36(EB) over Plum Creek | 1981 | 4,825 | Fair |
| I-72/US 36(WB) over Plum Creek | 1981 | 4,825 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
All of Illinois: Illinois bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.