Piatt County Bridge Report Card
Piatt County scores 81 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Piatt County, Illinois
Piatt County has 246 bridges in the National Bridge Inventory, with 14 rated poor and 4 rated scour-critical. Its poor-condition share of 5.7% is at or below the 9.5% statewide average. Poor-condition bridges carry about 14,225 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Piatt County a Bridge Condition Exposure Score of 81/100 (B). The county has 246 bridges in the National Bridge Inventory, including 14 in poor condition and 4 rated scour-critical. Poor-condition bridges carry about 14,225 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 | 5.7% | 11.4 |
| Poor-condition traffic exposure | 25 | 5.3% of measured traffic | 4.0 |
| Scour-critical bridge share | 20 | 1.6% | 3.3 |
| Average age vs national baseline | 10 | 46 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 267,115 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 | 5.7% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.6% |
| Average Bridge Age | 46 years |
| Poor-Condition Traffic Exposure | 14,225 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Piatt County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| I-72 (eb) over Norfolk Southern Railway | Poor condition + traffic exposure | Poor | 5,450 | 1975 |
| I-72 (wb) over Norfolk Southern Railway | Poor condition + traffic exposure | Poor | 5,450 | 1975 |
| Ill 10(fap 721) over W Br Goose Creek | Poor condition + traffic exposure | Poor | 1,600 | 1977 |
| Sbi 10 (fas 1532) over I-72 | Poor condition + traffic exposure | Poor | 925 | 1962 |
| Ch 12 over Stream | Poor condition + traffic exposure | Poor | 250 | 1939 |
| Tr 27 over Madden Creek | Poor condition + traffic exposure | Poor | 150 | 1962 |
| Tr 171 over Lake Fork | Poor condition + traffic exposure | Poor | 75 | 1964 |
| Tr 59 over Goose Creek | Poor condition + traffic exposure | Poor | 75 | 1965 |
| Tr 135 over Drainage Ditch | Poor condition + traffic exposure | Poor | 50 | 1955 |
| Tr 156(fas 1530) over Drainage Ditch | Poor condition + traffic exposure | Poor | 50 | 1962 |
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.