Rt Nn E over Dyer Rock CR
FairLafayette County, Missouri · S 10 T 49 N R 24 W · Structure no. 7697
- Built
- 1954
- 71 years old
- Condition
- Fair
- inspected January 2023
- Type
- Culvert
- Concrete Continuous
- Length
- 21 ft
- 2 main spans
- Daily traffic
- 86
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Rt Nn E over Dyer Rock CR is a concrete continuous culvert carrying Rt Nn E over Dyer Rock CR in Lafayette County, Missouri. It was built in 1954, so it is 71 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 86 vehicles a day, roughly 10% of them trucks, projected to reach 125 by 2044. The structure is 21 ft (6.3 m) long and 26 ft wide. If it were closed, the detour would be 123.7 mi (199 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 |
|---|---|---|
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Culvert | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Rt Nn E over Dyer Rock CR built?
It was built in 1954, making it 71 years old in 2025.
What condition is Rt Nn E over Dyer Rock CR 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 January 2023.
How much traffic does Rt Nn E over Dyer Rock CR carry?
About 86 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is Rt Nn E over Dyer Rock CR?
The structure is 21 ft (6.3 m) long with a longest span of 10 ft (3 m) and a deck 26 ft wide.
Who owns Rt Nn E over Dyer Rock CR?
It is owned by the State Highway Agency.