Randolph County Bridge Report Card
Randolph County scores 77 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Randolph County, Illinois
Randolph County has 149 bridges in the National Bridge Inventory, with 10 rated poor and 1 rated scour-critical. Its poor-condition share of 6.7% is at or below the 9.5% statewide average. Poor-condition bridges carry about 16,350 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Randolph County a Bridge Condition Exposure Score of 77/100 (C). The county has 149 bridges in the National Bridge Inventory, including 10 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 16,350 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 | 6.7% | 13.4 |
| Poor-condition traffic exposure | 25 | 11.2% of measured traffic | 8.4 |
| Scour-critical bridge share | 20 | 0.7% | 1.3 |
| Average age vs national baseline | 10 | 44 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 145,720 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 | 6.7% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.7% |
| Average Bridge Age | 44 years |
| Poor-Condition Traffic Exposure | 16,350 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Randolph County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Ill 150 over Miss Riv/fau 9416 | Poor condition + traffic exposure | Poor | 6,250 | 1942 |
| Ill 3 over Horse Creek Overflow | Poor condition + traffic exposure | Poor | 4,650 | 1952 |
| Ill 154 over Plum Creek | Poor condition + traffic exposure | Poor | 2,900 | 1972 |
| Ill 153 over Marys River | Poor condition + traffic exposure | Poor | 1,600 | 1934 |
| Tr 232 over Cox Creek | Poor condition + traffic exposure | Poor | 275 | 1981 |
| Tr 119 over Trib Of Marys Rv | Poor condition + traffic exposure | Poor | 225 | 1964 |
| Tr 119 over Marys River | Poor condition + traffic exposure | Poor | 225 | 1965 |
| Ill 155 over Prairie Du Rocher CR | Poor condition + traffic exposure | Poor | 100 | 1990 |
| Richelaman RD over Cox Creek | Poor condition + traffic exposure | Poor | 75 | 1995 |
| Tr 100 over Little Plum Creek | Poor condition + traffic exposure | Poor | 50 | 1964 |
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.