Scott County Bridge Report Card
Scott County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Scott County, Illinois
Scott County has 99 bridges in the National Bridge Inventory, with 7 rated poor and 0 rated scour-critical. Its poor-condition share of 7.1% is at or below the 9.5% statewide average. Poor-condition bridges carry about 8,000 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Scott County a Bridge Condition Exposure Score of 81/100 (B). The county has 99 bridges in the National Bridge Inventory, including 7 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 8,000 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 | 7.1% | 14.1 |
| Poor-condition traffic exposure | 25 | 6.7% of measured traffic | 5.0 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 42 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 119,625 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 | 7.1% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 42 years |
| Poor-Condition Traffic Exposure | 8,000 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Scott County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Old US 36 over Walnut Creek | Poor condition + traffic exposure | Poor | 2,750 | 1940 |
| Old US 36 over Fai 72 | Poor condition + traffic exposure | Poor | 2,700 | 1976 |
| Il 100/106 over Illinois River | Poor condition + traffic exposure | Poor | 1,850 | 1929 |
| Ch 9 over Big Sandy Creek | Poor condition + traffic exposure | Poor | 400 | 1987 |
| Ch 5 over Little Sandy Creek | Poor condition + traffic exposure | Poor | 150 | 1968 |
| Old Old US 36 over Lewis Creek | Poor condition + traffic exposure | Poor | 75 | 1923 |
| Tr 160 over Sandy Creek/tr 18 | Poor condition + traffic exposure | Poor | 75 | 1986 |
| Fai 72 over Drainage Ditch | High traffic | Fair | 9,900 | 1986 |
| Fai 72 over Tr 44 | High traffic | Good | 9,900 | 1987 |
| Fai 72 EB over Ill 100 | High traffic | Fair | 4,950 | 1981 |
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.