Nemaha County Bridge Report Card
Nemaha County scores 70 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Nemaha County, Kansas
Nemaha County has 355 bridges in the National Bridge Inventory, with 37 rated poor and 12 rated scour-critical. Its poor-condition share of 10.4% is above the 5.2% statewide average. Poor-condition bridges carry about 1,623 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Nemaha County a Bridge Condition Exposure Score of 70/100 (C). The county has 355 bridges in the National Bridge Inventory, including 37 in poor condition and 12 rated scour-critical. Poor-condition bridges carry about 1,623 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 | 10.4% | 20.8 |
| Poor-condition traffic exposure | 25 | 3.0% of measured traffic | 2.2 |
| Scour-critical bridge share | 20 | 3.4% | 6.8 |
| Average age vs national baseline | 10 | 38 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 54,157 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 | 10.4% |
| State Poor-Condition Share | 5.2% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 3.4% |
| Average Bridge Age | 38 years |
| Poor-Condition Traffic Exposure | 1,623 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Nemaha County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Rs 1267 C-9 over Silver Creek | Poor condition + traffic exposure | Poor | 342 | 1983 |
| Minor Col Bc-2 over Deer Creek | Poor condition + traffic exposure | Poor | 80 | 1976 |
| Rs 1757 J-15 over Trib. To Nemaha River | Poor condition + traffic exposure | Poor | 72 | 1935 |
| Rs 1226 Q-9 over Coal Creek | Poor condition + traffic exposure | Poor | 66 | 1946 |
| Rs 1228 I-13 over Trib.black Verillion R. | Poor condition + traffic exposure | Poor | 65 | 1963 |
| Local Rd. H-14 over Gregg Creek | Poor condition + traffic exposure | Poor | 30 | 1976 |
| Local Rd. J-4 over Illinois Creek | Poor condition + traffic exposure | Poor | 10 | 1984 |
| K236 HWY over Harris Creek | Poor condition + traffic exposure | Poor | 167 | 1928 |
| Rs 687 G-8 over Harris Creek | Poor condition + traffic exposure | Poor | 130 | 1936 |
| Rs 1270 C-13 over Trib. To Wolf Pen Creek | Poor condition + traffic exposure | Poor | 106 | 1928 |
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.