Bridge conditions in Clinton County, Illinois
190 inventoried bridges · 13 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
13 of the 190 bridges the federal inventory lists in Clinton County are rated poor; the rest split 106 good and 71 fair.
- 13 of the 190 bridges in Clinton County, Illinois, are rated in poor condition (6.8%) in the 2025 National Bridge Inventory, as of .
- 106 bridges (55.8%) are rated good and 71 (37.4%) fair.
- The median Clinton County bridge was built in 1980.
- The busiest poor-rated bridge is Albers Rd/fas 785 over Grassy Branch (built 1973), carrying about 2,700 vehicles a day.
Good 55.8% · Fair 37.4% · Poor 6.8% of 190 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 |
|---|---|---|---|
| Albers Rd/fas 785 over Grassy Branch | 1973 | 2,700 | Poor |
| Ill 177 over Queens Lake | 1922 | 2,000 | Poor |
| Fas 1781 over Bond Branch | 1963 | 950 | Poor |
| Emerald Rd over Trib to Beaver Crk | 1996 | 350 | Poor |
| Tr 175 over Prairie Branch | 1940 | 300 | Poor |
| Court ROAD/TR177 over Lake Branch | 1992 | 225 | Poor |
| Shattuc Rd/tr 206 over Brewster Creek | 1966 | 200 | Poor |
| Tr 133/ Sandoval R over Lost Creek Branch | 1948 | 175 | Poor |
| Tr 109/OLD State R over Beaver Creek | 1930 | 75 | Poor |
| Tr 184A/CREEK Road over Prairie Branch | 1974 | 75 | Poor |
| Tr 137A over Lost Ck | 1916 | 50 | Poor |
| Tr 56/LAKE Branch over Lake Branch | 1966 | 25 | Poor |
| Tr 198/LADUE Road over Coles Creek | 1901 | 25 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 64 over Trib to Queens Lake | 1973 | 31,000 | Good |
| Fai 64 EB over Sugar Ck Overflow | 1971 | 15,500 | Fair |
| Fai 64 WB over Sugar Ck Overflow | 1971 | 15,500 | Good |
| Fai 64 EB over Sugar Creek | 1970 | 15,500 | Fair |
| Fai 64 WB over Sugar Creek | 1970 | 15,500 | Good |
| Fai 64 EB over Sycamore Drainage Dt | 1970 | 15,500 | Good |
| Fai 64 WB over Sycamore Drain Ditch | 1970 | 15,500 | Good |
| Fai 64 EB over Kaskaskia R Overflow | 1970 | 15,500 | Good |
| Fai 64 WB over Kaskaskia Overflow | 1970 | 15,500 | Good |
| US 50 over Sugar Creek | 1973 | 7,700 | 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.