Rock Island County Bridge Report Card
Rock Island County scores 87 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Rock Island County, Illinois
Rock Island County has 272 bridges in the National Bridge Inventory, with 13 rated poor and 0 rated scour-critical. Its poor-condition share of 4.8% is at or below the 9.5% statewide average. Poor-condition bridges carry about 79,325 daily vehicle crossings.
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Copyable Facts for Reporters
BridgeLookup.com gives Rock Island County a Bridge Condition Exposure Score of 87/100 (B). The county has 272 bridges in the National Bridge Inventory, including 13 in poor condition and 0 rated scour-critical. Poor-condition bridges carry about 79,325 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 | 4.8% | 9.6 |
| Poor-condition traffic exposure | 25 | 4.2% of measured traffic | 3.1 |
| Scour-critical bridge share | 20 | 0.0% | 0.0 |
| Average age vs national baseline | 10 | 43 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 1,905,580 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 | 4.8% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 0.0% |
| Average Bridge Age | 43 years |
| Poor-Condition Traffic Exposure | 79,325 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Rock Island County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Il 5 WB (j Deere R over Fai 74 | Poor condition + traffic exposure | Poor | 38,900 | 1970 |
| 27th ST - Moline over Rock River Side RD | Poor condition + traffic exposure | Poor | 11,400 | 1938 |
| 27th St.-moline over Stream | Poor condition + traffic exposure | Poor | 10,050 | 1937 |
| East 10th Ave. over Mill Creek | Poor condition + traffic exposure | Poor | 7,750 | 1985 |
| Ch 16 over Case Creek | Poor condition + traffic exposure | Poor | 4,450 | 1983 |
| 39th AVE over Drainage Ditch | Poor condition + traffic exposure | Poor | 1,600 | 1972 |
| 46th AVE DR over Drainage Ditch | Poor condition + traffic exposure | Poor | 1,600 | 1973 |
| Road District 1 over Cooling Canal | Poor condition + traffic exposure | Poor | 1,250 | 1973 |
| 47 TH AVE DR over Drainage Ditch | Poor condition + traffic exposure | Poor | 875 | 1973 |
| 127th AVE (ch 55) over Mill Creek | Poor condition + traffic exposure | Poor | 600 | 1993 |
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.