Warren County Bridge Report Card
Warren County scores 70 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Warren County, Illinois
Warren County has 199 bridges in the National Bridge Inventory, with 15 rated poor and 0 rated scour-critical. Its poor-condition share of 7.5% is at or below the 9.5% statewide average. Poor-condition bridges carry about 38,520 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Warren County a Bridge Condition Exposure Score of 70/100 (C). The county has 199 bridges in the National Bridge Inventory, including 15 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 38,520 daily vehicle crossings. Poor condition does not mean unsafe; bridges judged unsafe are closed or restricted by transportation agencies.
How the Score Breaks Down
| Factor | Weight | County Value | Penalty |
|---|---|---|---|
| Poor-condition bridge share | 40 | 7.5% | 15.1 |
| Poor-condition traffic exposure | 25 | 19.3% of measured traffic | 14.4 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 41 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 200,100 measured daily crossings | 0.0 |
Score = 100 minus weighted penalties. The score is a comparative research signal, not an official safety rating. Read the full methodology.
County Comparisons
| County Poor-Condition Share | 7.5% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 41 years |
| Poor-Condition Traffic Exposure | 38,520 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Warren County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| US 34 Il 164 Il 1 over Cedar CR Trib | Poor condition + traffic exposure | Poor | 9,450 | 1964 |
| US 34 over Cedar Creek Trib | Poor condition + traffic exposure | Poor | 8,950 | 1985 |
| US 34 & 67 (nb) over Bnsf Rr (079039a) | Poor condition + traffic exposure | Poor | 8,100 | 1975 |
| US 34 over Sbi 8 (old US 34) | Poor condition + traffic exposure | Poor | 8,050 | 1985 |
| US 67 over Middle Hendn CR | Poor condition + traffic exposure | Poor | 2,250 | 1954 |
| Ill 135 over Davids CR | Poor condition + traffic exposure | Poor | 1,150 | 1930 |
| Ch-7 over Cedar Creek | Poor condition + traffic exposure | Poor | 150 | 1900 |
| Tr 175 over Slug Run | Poor condition + traffic exposure | Poor | 75 | 1900 |
| Tr 232 (165th St) over US 34 & Cedar Creek | Poor condition + traffic exposure | Poor | 75 | 1979 |
| Tr 188 over Br Cedar Fk CR | Poor condition + traffic exposure | Poor | 50 | 1961 |
Important safety note
Poor condition does not mean a bridge is unsafe. It means at least one major component has significant deterioration and the bridge is a priority for maintenance, repair, or replacement. Bridges judged unsafe are closed or restricted by transportation agencies.