Grade LN over Unnamed Str
FairPosted for loadAdair County, Missouri · S 8 T 61 N R 13 W · Structure no. 21700
- Built
- 1930
- 95 years old, rebuilt 1994
- Condition
- Fair
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 30 ft
- 1 main span
- Daily traffic
- 35
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
Grade LN over Unnamed Str is a steel stringer/multi-beam or girder carrying Grade LN over Unnamed Str in Adair County, Missouri. It was built in 1930 and reconstructed in 1994, 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 39 by 2044. The structure is 30 ft (9.1 m) long and 19 ft wide. If it were closed, the detour would be 8.1 mi (13 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Grade LN over Unnamed Str built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1994.
What condition is Grade LN over Unnamed Str in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in February 2024.
How much traffic does Grade LN over Unnamed Str carry?
About 35 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is Grade LN over Unnamed Str?
The structure is 30 ft (9.1 m) long with a longest span of 27 ft (8.3 m) and a deck 19 ft wide.
Who owns Grade LN over Unnamed Str?
It is owned by the County Highway Agency.