Bridge conditions in Adair County, Missouri
301 inventoried bridges · 17 rated poor · 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
The federal inventory lists 301 bridges in Adair County: 185 rated good, 99 fair, and 17 poor.
- 17 of the 301 bridges in Adair County, Missouri, are rated in poor condition (5.6%) in the 2025 National Bridge Inventory, as of .
- 185 bridges (61.5%) are rated good and 99 (32.9%) fair.
- The median Adair County bridge was built in 1998.
- The busiest poor-rated bridge is Mo 6 E over Hoge Br (built 1926), carrying about 2,660 vehicles a day.
Good 61.5% · Fair 32.9% · Poor 5.6% of 301 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.
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 6 E over Hoge Br | 1926 | 2,660 | Poor |
| Mo 11 S over Mussel Fk | 1933 | 323 | Poor |
| Rt V S over N Timber CR | 1932 | 267 | Poor |
| Rt E E over Bear CR | 1947 | 266 | Poor |
| Lincoln St over Floyd CR | 1998 | 248 | Poor |
| Missouri St over Branch | 1935 | 40 | Poor |
| Grapevine Rd over Blackbird CR | 1960 | 30 | Poor |
| Dupree Trail over Billy CR | 1996 | 30 | Poor |
| Stukey Cemetery Tr over E Fk Chariton Rvr | 1970 | 25 | Poor |
| Frontier Ln over Branch of Bear CR | 1998 | 25 | Poor |
| Ember Lane over Br of Bear CR | 1999 | 20 | Poor |
| Cranberry Ln over BNSF RR | 1950 | 15 | Poor |
| Prairie View Trail over Long Br | 1975 | 15 | Poor |
| Prairie View Trail over Trib of Long Br | 2005 | 15 | Poor |
| Keel CR Rd over Br to Shut Eye CR | 1975 | 10 | Poor |
| Muir Trail over Br of Mussel Fk | 1982 | 10 | Poor |
| Titan Ln over BNSF RR | 1950 | 5 | Poor |
Busiest bridges in the county
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mo 6 E over Steer CR | 1995 | 15,108 | Fair |
| Mo 6 E over Steer CR | 1995 | 13,826 | Fair |
| US 63 S over Long Branch CR | 1925 | 8,532 | Fair |
| US 63 S over Unnamed Stream | 2009 | 7,393 | Fair |
| US 63 S over Floyd CR | 1987 | 7,393 | Fair |
| Mo 11 S over Bear CR Br | 1925 | 5,924 | Fair |
| Mo 11 S over Bear CR | 1956 | 5,924 | Fair |
| US 63 S over Steer CR | 2009 | 5,786 | Good |
| US 63 S over Bu 63 | 2009 | 5,525 | Good |
| Mo 6 E over Abandoned RR | 1974 | 5,089 | Fair |
Source: FHWA National Bridge Inventory, 2025. Counts cover inventoried highway bridges over 20 feet; ratings are reported by the state DOT.
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.