NW400 over White Oak CR
PoorPosted for loadHenry County, Missouri · S 15 T 42 N R 28 W · Structure no. 20614
- Built
- 1930
- 95 years old, rebuilt 1985
- Condition
- Poor
- inspected March 2023
- Type
- Girder and Floorbeam System
- Steel Continuous
- Length
- 75 ft
- 2 main spans
- Daily traffic
- 50
- 2023 count
- Owner
- County
- County Highway Agency
About this bridge
NW400 over White Oak CR is a steel continuous girder and floorbeam system carrying NW400 over White Oak CR in Henry County, Missouri. It was built in 1930 and reconstructed in 1985, so it is 95 years old, older than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.
It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 70 by 2043. The structure is 75 ft (22.9 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 3 Serious | Loss of section, deterioration, spalling or scour have seriously affected primary structural components. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was NW400 over White Oak CR built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1985.
What condition is NW400 over White Oak CR in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.
How much traffic does NW400 over White Oak CR carry?
About 50 vehicles per day (2023 count), of which roughly 10% are trucks.
How long is NW400 over White Oak CR?
The structure is 75 ft (22.9 m) long with a longest span of 37 ft (11.3 m) and a deck 18 ft wide.
Who owns NW400 over White Oak CR?
It is owned by the County Highway Agency.