Bridge conditions in Alexander County, Illinois
93 inventoried bridges · 8 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Alexander County tracks close to typical: 8 of its 93 inventoried bridges (8.6%) are rated poor, against a national rate of about 7%.
- 8 of the 93 bridges in Alexander County, Illinois, are rated in poor condition (8.6%) in the 2025 National Bridge Inventory, as of .
- 26 bridges (28.0%) are rated good and 59 (63.4%) fair.
- The median Alexander County bridge was built in 1983.
- The busiest poor-rated bridge is US 60 & 62 over Mississippi R (built 1929), carrying about 3,450 vehicles a day.
Good 28.0% · Fair 63.4% · Poor 8.6% of 93 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 |
|---|---|---|---|
| US 60 & 62 over Mississippi R | 1929 | 3,450 | Poor |
| Ill 3 over Drainage Ditch | 1948 | 2,500 | Poor |
| Fas 945 over Clear Creek Ditch | 1959 | 1,100 | Poor |
| Fas 943 over Sandy Creek W Fork | 1983 | 1,100 | Poor |
| Fas 941 over Mill Creek | 1980 | 800 | Poor |
| Fas 943 over Ambeer Creek | 1982 | 650 | Poor |
| Tr 150 over Hartline Creek | 1980 | 125 | Poor |
| Twp Rd 106 over East Fork Sandy Ck | 1974 | 25 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Fai 57 over Mississippi River | 1978 | 15,000 | Fair |
| Fap 312-il 146 over Mississippi River | 2003 | 9,350 | Fair |
| Ill 146 over Drainage Ditch | 2011 | 8,550 | Good |
| I 57 NB over ILL3/US 51-cs 6010a-cnic | 1978 | 7,500 | Fair |
| I 57 SB over ILL3/US 51-cs 6010a-cnic | 1978 | 7,500 | Fair |
| Fai-57 NB over Tr-163b | 1968 | 6,100 | Fair |
| I 57 SB over Tr 163B Golden Lilly | 1968 | 6,100 | Fair |
| I 57 NB over Cache River | 1967 | 6,100 | Fair |
| I 57 SB over Cache River | 1967 | 6,100 | Fair |
| US 51 over Ohio River | 1937 | 5,700 | 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.