Jersey County Bridge Report Card
Jersey County scores 85 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Jersey County, Illinois
Jersey County has 113 bridges in the National Bridge Inventory, with 6 rated poor and 0 rated scour-critical. Its poor-condition share of 5.3% is at or below the 9.5% statewide average. Poor-condition bridges carry about 5,900 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Jersey County a Bridge Condition Exposure Score of 85/100 (B). The county has 113 bridges in the National Bridge Inventory, including 6 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 5,900 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 | 5.3% | 10.6 |
| Poor-condition traffic exposure | 25 | 5.5% of measured traffic | 4.1 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 45 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 107,285 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 | 5.3% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 45 years |
| Poor-Condition Traffic Exposure | 5,900 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Jersey County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Ill 100 over Elsah Creek | Poor condition + traffic exposure | Poor | 4,150 | 1961 |
| Ill 100 over Drains To Eagle Lake | Poor condition + traffic exposure | Poor | 775 | 1938 |
| Tr 187 over Little Piasa Ck | Poor condition + traffic exposure | Poor | 500 | 1972 |
| Fas 774 over Otter Creek | Poor condition + traffic exposure | Poor | 225 | 1978 |
| Tr 150c over Branch Little Piasa | Poor condition + traffic exposure | Poor | 150 | 1975 |
| Tr 195 over Mill Creek | Poor condition + traffic exposure | Poor | 100 | 1977 |
| US 67 SB over Piasa Creek | High traffic | Good | 12,100 | 2012 |
| US 67 NB over Piasa Creek | High traffic | Good | 12,100 | 2012 |
| US 67 over De Arcy Creek | High traffic | Fair | 5,300 | 1921 |
| Il 100 (nb) over Piasa Creek | High traffic | Fair | 5,150 | 1997 |
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.