Logan County Bridge Report Card
Logan County scores 82 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Logan County, Kansas
Logan County has 55 bridges in the National Bridge Inventory, with 2 rated poor and 1 rated scour-critical. Its poor-condition share of 3.6% is at or below the 5.2% statewide average. Poor-condition bridges carry about 1,196 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Logan County a Bridge Condition Exposure Score of 82/100 (B). The county has 55 bridges in the National Bridge Inventory, including 2 in poor condition and 1 rated scour-critical. Poor-condition bridges carry about 1,196 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 | 3.6% | 7.3 |
| Poor-condition traffic exposure | 25 | 3.0% of measured traffic | 2.2 |
| Scour-critical bridge share | 20 | 1.8% | 3.6 |
| Average age vs national baseline | 10 | 59 years vs 48 nationally | 4.4 |
| Traffic-data completeness | 5 | 39,943 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 | 3.6% |
| State Poor-Condition Share | 5.2% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.8% |
| Average Bridge Age | 59 years |
| Poor-Condition Traffic Exposure | 1,196 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Logan County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Us40 HWY over N Fk Smoky Hill River | Poor condition + traffic exposure | Poor | 1,056 | 1957 |
| 160 Road (rs 246) over N. Fork Smoky Hill River | Poor condition + traffic exposure | Poor | 140 | 1928 |
| Us83 HWY over Plum Creek | Scour-critical foundation rating | Good | 3,558 | 1982 |
| I70 HWY WB over Up Railroad | High traffic | Good | 5,600 | 1965 |
| I70 HWY EB over Up Railroad | High traffic | Good | 5,600 | 1965 |
| Us-83 HWY over Smoky Hill River | High traffic | Good | 3,558 | 1995 |
| Us-83 HWY over Smoky Hill River Drain | High traffic | Good | 3,558 | 1996 |
| Us-83 Hiway over Hackberry CR N Br | High traffic | Good | 3,520 | 1998 |
| Us83 HWY over Mid Br Hackberry CR | High traffic | Good | 1,917 | 1982 |
| Us-83 Hiway over Hackberry CR S Br | High traffic | Good | 1,917 | 1998 |
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.