Bridge conditions in Union County, Illinois
188 inventoried bridges · 7 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Union County tracks close to typical: 7 of its 188 inventoried bridges (3.7%) are rated poor, against a national rate of about 7%.
- 7 of the 188 bridges in Union County, Illinois, are rated in poor condition (3.7%) in the 2025 National Bridge Inventory, as of .
- 101 bridges (53.7%) are rated good and 80 (42.6%) fair.
- The median Union County bridge was built in 1985.
- The busiest poor-rated bridge is Fai 57 SB & US 51 over Fas 926-big Creek (built 1959), carrying about 6,700 vehicles a day.
Good 53.7% · Fair 42.6% · Poor 3.7% of 188 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 |
|---|---|---|---|
| Fai 57 SB & US 51 over Fas 926-big Creek | 1959 | 6,700 | Poor |
| I 57 NB & US 51 NB over Fas 926-big Creek | 1959 | 6,700 | Poor |
| Ill 146 over Cypress Creek | 1931 | 4,650 | Poor |
| Ill 146 over Clear Creek | 1976 | 4,050 | Poor |
| Fas 924 over Bradshaw CR | 1981 | 2,150 | Poor |
| Ch 3 over Little Creek | 1935 | 600 | Poor |
| Tr 295 over Crooked Creek | 1900 | 100 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 57 over Lick Creek | 1960 | 15,900 | Fair |
| I 57 over N.fork Lick Creek | 1960 | 15,900 | Fair |
| I 57 NB over Tr 276 N Lick CR Rd | 1959 | 7,950 | Fair |
| I 57 SB over Tr 276 N Lick CR Rd | 1959 | 7,950 | Fair |
| Fai 57 SB & US 51 over Fas 926-big Creek | 1959 | 6,700 | Poor |
| I 57 NB & US 51 NB over Fas 926-big Creek | 1959 | 6,700 | Poor |
| I-57 over Shake Rag Road | 2020 | 6,300 | Good |
| I-57 SB over Shake Rag Road | 2019 | 6,300 | Good |
| I 57 NB over Cypress Creek | 1959 | 5,950 | Good |
| I 57 SB over Cypress Creek | 1959 | 5,950 | Good |
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.