Grundy County Bridge Report Card
Grundy County scores 72 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Grundy County, Missouri
Grundy County has 185 bridges in the National Bridge Inventory, with 18 rated poor and 7 rated scour-critical. Its poor-condition share of 9.7% is above the 8.8% statewide average. Poor-condition bridges carry about 928 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Grundy County a Bridge Condition Exposure Score of 72/100 (C). The county has 185 bridges in the National Bridge Inventory, including 18 in poor condition and 7 rated scour-critical. Poor-condition bridges carry about 928 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 | 9.7% | 19.5 |
| Poor-condition traffic exposure | 25 | 1.7% of measured traffic | 1.3 |
| Scour-critical bridge share | 20 | 3.8% | 7.6 |
| Average age vs national baseline | 10 | 32 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 54,562 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 | 9.7% |
| State Poor-Condition Share | 8.8% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 3.8% |
| Average Bridge Age | 32 years |
| Poor-Condition Traffic Exposure | 928 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Grundy County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| RT B E over Muddy CR | Poor condition + traffic exposure | Poor | 260 | 1952 |
| NE 20th AVE over Owl Br Muddy CR | Poor condition + traffic exposure | Poor | 10 | 1993 |
| SE 10th ST over Br Medicine CR | Poor condition + traffic exposure | Poor | 5 | 1950 |
| NE 115th ST over Honey CR | Poor condition + traffic exposure | Poor | 5 | 1994 |
| NE 115th ST over E Honey CR | Poor condition + traffic exposure | Poor | 5 | 2003 |
| RT E E over Medicine CR Drain | Poor condition + traffic exposure | Poor | 272 | 1947 |
| RT C E over Weldon Fk Grand Rv | Poor condition + traffic exposure | Poor | 201 | 1936 |
| SE 20th ST over No CR | Poor condition + traffic exposure | Poor | 30 | 1930 |
| NE 105th ST over Unnamed Stream | Poor condition + traffic exposure | Poor | 20 | 1991 |
| NE 105th ST over Trib W Fk Medicine | Poor condition + traffic exposure | Poor | 20 | 1991 |
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.