Bridge conditions in Randolph County, Illinois
149 inventoried bridges · 10 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
10 of the 149 bridges the federal inventory lists in Randolph County are rated poor; the rest split 87 good and 52 fair.
- 10 of the 149 bridges in Randolph County, Illinois, are rated in poor condition (6.7%) in the 2025 National Bridge Inventory, as of .
- 87 bridges (58.4%) are rated good and 52 (34.9%) fair.
- The median Randolph County bridge was built in 1987.
- The busiest poor-rated bridge is Ill 150 over Miss Riv/fau 9416 (built 1942), carrying about 6,250 vehicles a day.
Good 58.4% · Fair 34.9% · Poor 6.7% of 149 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 |
|---|---|---|---|
| Ill 150 over Miss Riv/fau 9416 | 1942 | 6,250 | Poor |
| Ill 3 over Horse Creek Overflow | 1952 | 4,650 | Poor |
| Ill 154 over Plum Creek | 1972 | 2,900 | Poor |
| Ill 153 over Marys River | 1934 | 1,600 | Poor |
| Tr 232 over Cox Creek | 1981 | 275 | Poor |
| Tr 119 over Marys River | 1965 | 225 | Poor |
| Tr 119 over Trib of Marys Rv | 1964 | 225 | Poor |
| Ill 155 over Prairie Du Rocher CR | 1990 | 100 | Poor |
| Richelaman Rd over Cox Creek | 1995 | 75 | Poor |
| Tr 100 over Little Plum Creek | 1964 | 50 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Il 3 over Black Creek | 1995 | 8,400 | Good |
| Ill 150 over Miss Riv/fau 9416 | 1942 | 6,250 | Poor |
| Il 3 over UPRR | 1971 | 5,650 | Good |
| Il 3 over Nine Mile Creek | 2024 | 5,650 | Good |
| Ill 4-150 over Marys River | 1928 | 5,500 | Fair |
| Il 150 over Little Marys River | 1999 | 5,450 | Good |
| Ill 4 & 150 over Cox Creek | 1977 | 4,900 | Fair |
| Ill 3 over Horse Creek Overflow | 1952 | 4,650 | Poor |
| Il 3 over Horse Creek | 2006 | 4,650 | Good |
| Il Rte 3 over Trib to Horse Creek | 1994 | 4,650 | 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.