Shelby County Bridge Report Card
Shelby County scores 82 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Shelby County, Illinois
Shelby County has 335 bridges in the National Bridge Inventory, with 26 rated poor and 0 rated scour-critical. Its poor-condition share of 7.8% is at or below the 9.5% statewide average. Poor-condition bridges carry about 4,295 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Shelby County a Bridge Condition Exposure Score of 82/100 (B). The county has 335 bridges in the National Bridge Inventory, including 26 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 4,295 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 | 7.8% | 15.5 |
| Poor-condition traffic exposure | 25 | 2.9% of measured traffic | 2.2 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 47 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 148,700 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 | 7.8% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 47 years |
| Poor-Condition Traffic Exposure | 4,295 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Shelby County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Tr 62(n. Main St) over Long Grove Creek | Poor condition + traffic exposure | Poor | 1,250 | 1953 |
| Fas 1632(ch 38) over W Br Little Wabash R | Poor condition + traffic exposure | Poor | 475 | 1916 |
| Fas 648(ch 16) over Stream | Poor condition + traffic exposure | Poor | 425 | 1939 |
| Fas 648(ch 16) over Flat Branch | Poor condition + traffic exposure | Poor | 350 | 1939 |
| Ch 16(fas 648) over Flat Branch | Poor condition + traffic exposure | Poor | 350 | 1942 |
| Tr 385 over Little Wabash | Poor condition + traffic exposure | Poor | 200 | 1924 |
| Ch 18 over Mud Creek | Poor condition + traffic exposure | Poor | 200 | 1961 |
| Ch 40 over Richland Creek | Poor condition + traffic exposure | Poor | 150 | 1923 |
| Tr 6 over Oppossum Creek | Poor condition + traffic exposure | Poor | 100 | 1909 |
| Tr 320 over Richland Creek | Poor condition + traffic exposure | Poor | 75 | 1909 |
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.