Whiteside County Bridge Report Card
Whiteside County scores 74 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Whiteside County, Illinois
Whiteside County has 278 bridges in the National Bridge Inventory, with 23 rated poor and 12 rated scour-critical. Its poor-condition share of 8.3% is at or below the 9.5% statewide average. Poor-condition bridges carry about 8,245 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Whiteside County a Bridge Condition Exposure Score of 74/100 (C). The county has 278 bridges in the National Bridge Inventory, including 23 in poor condition and 12 rated scour-critical. Poor-condition bridges carry about 8,245 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 | 8.3% | 16.5 |
| Poor-condition traffic exposure | 25 | 1.4% of measured traffic | 1.0 |
| Scour-critical bridge share | 20 | 4.3% | 8.6 |
| Average age vs national baseline | 10 | 48 years vs 48 nationally | 0.2 |
| Traffic-data completeness | 5 | 593,185 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 | 8.3% |
| State Poor-Condition Share | 9.5% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 4.3% |
| Average Bridge Age | 48 years |
| Poor-Condition Traffic Exposure | 8,245 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Whiteside County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Science Ridge Road over Spring Creek | Poor condition + traffic exposure | Poor | 500 | 1983 |
| Second Street over Hennepin Canal Feedr | Poor condition + traffic exposure | Poor | 1,450 | 1976 |
| East Eleventh Stre over Il Mis Feeder Canal | Poor condition + traffic exposure | Poor | 1,200 | 1963 |
| Chase Road over Cattail Creek | Poor condition + traffic exposure | Poor | 1,200 | 1979 |
| Genesee Court over Rock Creek | Poor condition + traffic exposure | Poor | 1,100 | 1981 |
| Prairie Center Roa over Br Of Rock Creek | Poor condition + traffic exposure | Poor | 1,000 | 1981 |
| Smaltz Road over Otter Creek | Poor condition + traffic exposure | Poor | 375 | 1982 |
| Yorktown Road over County Ditch No. 1 | Poor condition + traffic exposure | Poor | 325 | 1979 |
| Lister Road over Br. Of Rock Creek | Poor condition + traffic exposure | Poor | 225 | 1991 |
| Lyndon RD over Elsworth Creek | Poor condition + traffic exposure | Poor | 125 | 1972 |
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.