Linn County Bridge Report Card
Linn County scores 50 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Linn County, Missouri
Linn County has 313 bridges in the National Bridge Inventory, with 56 rated poor and 10 rated scour-critical. Its poor-condition share of 17.9% is above the 8.8% statewide average. Poor-condition bridges carry about 27,853 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Linn County a Bridge Condition Exposure Score of 50/100 (F). The county has 313 bridges in the National Bridge Inventory, including 56 in poor condition and 10 rated scour-critical. Poor-condition bridges carry about 27,853 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 | 17.9% | 35.8 |
| Poor-condition traffic exposure | 25 | 10.9% of measured traffic | 8.2 |
| Scour-critical bridge share | 20 | 3.2% | 6.4 |
| Average age vs national baseline | 10 | 46 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 255,785 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 | 17.9% |
| State Poor-Condition Share | 8.8% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 3.2% |
| Average Bridge Age | 46 years |
| Poor-Condition Traffic Exposure | 27,853 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Linn County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Kite RD over Winnegan CR | Poor condition + traffic exposure | Poor | 30 | 1930 |
| June DR over Branch Of Yellow C | Poor condition + traffic exposure | Poor | 25 | 1988 |
| London RD over Yellow CR | Poor condition + traffic exposure | Poor | 20 | 1904 |
| Jaffa RD over Bear CR | Poor condition + traffic exposure | Poor | 20 | 1994 |
| Mill DR over Sights Br | Poor condition + traffic exposure | Poor | 15 | 1935 |
| Ladue RD over E Yellow CR | Poor condition + traffic exposure | Poor | 15 | 1993 |
| Hyde RD over Long Br | Poor condition + traffic exposure | Poor | 15 | 1996 |
| US 36 E over Sights Br | Poor condition + traffic exposure | Poor | 8,773 | 1924 |
| US 36 W over Muddy CR | Poor condition + traffic exposure | Poor | 6,227 | 1964 |
| US 36 W over Big Turkey CR | Poor condition + traffic exposure | Poor | 5,215 | 1961 |
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.