Bridge conditions in Lee County, Illinois
373 inventoried bridges · 42 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Lee County has 42 bridges rated poor out of 373 inventoried, a 11.3% share that puts it well above the national rate of about 7%.
- 42 of the 373 bridges in Lee County, Illinois, are rated in poor condition (11.3%) in the 2025 National Bridge Inventory, as of .
- 147 bridges (39.4%) are rated good and 184 (49.3%) fair.
- The median Lee County bridge was built in 1982.
- The busiest poor-rated bridge is Ch 1 Lost Nation R over Franklin Creek (built 1957), carrying about 1,900 vehicles a day.
Good 39.4% · Fair 49.3% · Poor 11.3% of 373 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.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 52 & Il 2 & Il over Rock River | 2002 | 22,100 | Fair |
| I 39&US 51 over Steward Creek Branch | 1984 | 19,500 | Fair |
| I 39&US 51 over Dry Run Creek | 1982 | 19,100 | Fair |
| I 39&US 51 over Stream | 1984 | 19,100 | Fair |
| I 39&US 51 over Harmon Creek South | 1982 | 19,100 | Fair |
| I 39&US 51 over Willow Creek | 1983 | 18,700 | Fair |
| I 39&US 51 over Willow Creek | 1983 | 18,700 | Fair |
| I 39&US 51 over Willow Creek | 1983 | 18,700 | Fair |
| I-88 over Cleary Lateral Creek | 1972 | 16,100 | Good |
| I-88 over Beach Creek | 1972 | 16,100 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Lee County → - all 373, busiest first, each with its own condition record.
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.