S 80 over Shonkin Creek
GoodChouteau County, Montana · 1M E Fort Benton · Structure no. P00080004+01141
- Built
- 2003
- 22 years old
- Condition
- Good
- inspected November 2021
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 178 ft
- 2 main spans
- Daily traffic
- 696
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 80 over Shonkin Creek is a prestressed concrete stringer/multi-beam or girder carrying S 80 over Shonkin Creek in Chouteau County, Montana. It was built in 2003, so it is 22 years old, younger than the Montana average of 47 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 696 vehicles a day, roughly 11% of them trucks, projected to reach 731 by 2043. The structure is 178 ft (54.3 m) long and 37 ft wide. If it were closed, the detour would be 123.7 mi (199 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 80 over Shonkin Creek built?
It was built in 2003, making it 22 years old in 2025.
What condition is S 80 over Shonkin Creek 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 November 2021.
How much traffic does S 80 over Shonkin Creek carry?
About 696 vehicles per day (2023 count), of which roughly 11% are trucks.
How long is S 80 over Shonkin Creek?
The structure is 178 ft (54.3 m) long with a longest span of 99 ft (30.3 m) and a deck 37 ft wide.
Who owns S 80 over Shonkin Creek?
It is owned by the State Highway Agency.