Bridge conditions in Polk County, Missouri
184 inventoried bridges · 32 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
Polk County has 32 bridges rated poor out of 184 inventoried, a 17.4% share that puts it well above the national rate of about 7%.
- 32 of the 184 bridges in Polk County, Missouri, are rated in poor condition (17.4%) in the 2025 National Bridge Inventory, as of .
- 63 bridges (34.2%) are rated good and 89 (48.4%) fair.
- The median Polk County bridge was built in 1979.
- The busiest poor-rated bridge is Mo 13 N over Dry Sac Rvr (built 1970), carrying about 10,782 vehicles a day.
Good 34.2% · Fair 48.4% · Poor 17.4% of 184 bridges
Bridges rated poor
Every bridge in the county with a poor rating, busiest first. Poor means a major component is rated 4 or lower on FHWA's 0-9 scale; it is a repair flag, not a closure notice.
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 13 S over Slagle CR | 1973 | 25,477 | Fair |
| Mo 13 S over Dry Sac Rvr Br | 1973 | 22,761 | Fair |
| Mo 13 S over Br of Brush CR | 1958 | 14,992 | Fair |
| Mo 13 S over Br Dry Fork CR | 1958 | 14,992 | Fair |
| Mo 13 S over Dry Sac Rvr | 1972 | 11,979 | Fair |
| Mo 83 S over Mo 13 | 2003 | 11,254 | Fair |
| Mo 13 N over Dry Sac Rvr | 1970 | 10,782 | Poor |
| Mo 13 S over Rt T | 2002 | 8,614 | Good |
| Mo 13 N over Rt T | 2002 | 8,355 | Good |
| Mo 13 S over Brush CR | 2004 | 7,642 | Good |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
Every bridge in Polk County → - all 184, busiest first, each with its own condition record.
All of Missouri: Missouri bridge conditions by county · every download on the data page.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.