S 80 over Arrow Creek
FairPosted for loadFergus County, Montana · 17M S Geraldine · Structure no. P00080046+01121
- Built
- 1949
- 76 years old, rebuilt 1960
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Wood or Timber
- Length
- 250 ft
- 10 main spans
- Daily traffic
- 171
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 80 over Arrow Creek is a wood or timber stringer/multi-beam or girder carrying S 80 over Arrow Creek in Fergus County, Montana. It was built in 1949 and reconstructed in 1960, so it is 76 years old, older than the Montana average of 47 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 171 vehicles a day, roughly 16% of them trucks, projected to reach 180 by 2043. The structure is 250 ft (76.2 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 |
|---|---|---|
| Deck | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 S 80 over Arrow Creek built?
It was built in 1949, making it 76 years old in 2025. It was reconstructed in 1960.
What condition is S 80 over Arrow Creek 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 September 2024.
How much traffic does S 80 over Arrow Creek carry?
About 171 vehicles per day (2023 count), of which roughly 16% are trucks.
How long is S 80 over Arrow Creek?
The structure is 250 ft (76.2 m) long with a longest span of 25 ft (7.6 m) and a deck 26 ft wide.
Who owns S 80 over Arrow Creek?
It is owned by the State Highway Agency.