Platte County Bridge Report Card
Platte County scores 79 out of 100 on BridgeLookup's Bridge Condition Exposure Score, based on FHWA National Bridge Inventory records.
Platte County, Missouri
Platte County has 287 bridges in the National Bridge Inventory, with 19 rated poor and 5 rated scour-critical. Its poor-condition share of 6.6% is at or below the 8.8% statewide average. Poor-condition bridges carry about 155,015 daily vehicle crossings.
Quote-Ready Local Facts
Copyable Facts for Reporters
BridgeLookup.com gives Platte County a Bridge Condition Exposure Score of 79/100 (C). The county has 287 bridges in the National Bridge Inventory, including 19 in poor condition and 5 rated scour-critical. Poor-condition bridges carry about 155,015 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 | 6.6% | 13.2 |
| Poor-condition traffic exposure | 25 | 5.5% of measured traffic | 4.1 |
| Scour-critical bridge share | 20 | 1.7% | 3.5 |
| Average age vs national baseline | 10 | 39 years vs 48 nationally | 0.0 |
| Traffic-data completeness | 5 | 2,836,411 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 | 6.6% |
| State Poor-Condition Share | 8.8% |
| National Poor-Condition Share | 6.7% |
| County Scour-Critical Share | 1.7% |
| Average Bridge Age | 39 years |
| Poor-Condition Traffic Exposure | 155,015 vehicles/day |
Bridges to Watch
Top Bridges to Watch in Platte County
| Bridge | Reason | Condition | Daily Traffic | Year Built |
|---|---|---|---|---|
| Is 29 N over Platte Rvr | Poor condition + traffic exposure | Poor | 26,656 | 1959 |
| Is 29 S over Platte Rvr Ovrfl | Poor condition + traffic exposure | Poor | 18,026 | 1950 |
| RT Z E over Platte Rvr | Poor condition + traffic exposure | Poor | 958 | 1966 |
| Is 29 S over Owl CR | Poor condition + traffic exposure | Poor | 38,357 | 1958 |
| Is 435 S over First CR | Poor condition + traffic exposure | Poor | 24,918 | 1977 |
| Mo 9 S over Burlington CR | Poor condition + traffic exposure | Poor | 13,459 | 1968 |
| Mo 92 E over Missouri Rvr Rr Up Rr | Poor condition + traffic exposure | Poor | 10,684 | 1955 |
| Mo 92 E over Platte Rvr | Poor condition + traffic exposure | Poor | 6,862 | 1995 |
| Mo 9 N over US 69 | Poor condition + traffic exposure | Poor | 6,545 | 1969 |
| Cookingham DR over Second CR | Poor condition + traffic exposure | Poor | 1,940 | 1950 |
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.