170 ST over Trib of Tarkio Rvr
GoodAtchison County, Missouri · S 34 T 66 N R 39 W · Structure no. 20681
- Built
- 1986
- 39 years old
- Condition
- Good
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 54 ft
- 1 main span
- Daily traffic
- 20
- 2024 count
- Owner
- County
- County Highway Agency
About this bridge
170 ST over Trib of Tarkio Rvr is a steel stringer/multi-beam or girder carrying 170 ST over Trib of Tarkio Rvr in Atchison County, Missouri. It was built in 1986, so it is 39 years old, younger than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 20 vehicles a day, roughly 10% of them trucks, projected to reach 23 by 2044. The structure is 54 ft (16.5 m) long and 24 ft wide. If it were closed, the detour would be 5 mi (8 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 8 Very Good | No problems noted. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| 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 170 ST over Trib of Tarkio Rvr built?
It was built in 1986, making it 39 years old in 2025.
What condition is 170 ST over Trib of Tarkio Rvr in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2024.
How much traffic does 170 ST over Trib of Tarkio Rvr carry?
About 20 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is 170 ST over Trib of Tarkio Rvr?
The structure is 54 ft (16.5 m) long with a longest span of 53 ft (16.3 m) and a deck 24 ft wide.
Who owns 170 ST over Trib of Tarkio Rvr?
It is owned by the County Highway Agency.