S 59 over South Fork Sunday Creek
FairCuster County, Montana · 3M NW Miles City · Structure no. P00018003+09001
- Built
- 1930
- 95 years old, rebuilt 1963
- Condition
- Fair
- inspected April 2023
- Type
- Tee Beam
- Concrete
- Length
- 164 ft
- 4 main spans
- Daily traffic
- 1,474
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 59 over South Fork Sunday Creek is a concrete tee beam carrying S 59 over South Fork Sunday Creek in Custer County, Montana. It was built in 1930 and reconstructed in 1963, so it is 95 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 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 1,474 vehicles a day, roughly 4% of them trucks, projected to reach 1,732 by 2043. The structure is 164 ft (50 m) long and 31 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| 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 59 over South Fork Sunday Creek built?
It was built in 1930, making it 95 years old in 2025. It was reconstructed in 1963.
What condition is S 59 over South Fork Sunday 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 April 2023.
How much traffic does S 59 over South Fork Sunday Creek carry?
About 1,474 vehicles per day (2023 count), of which roughly 4% are trucks.
How long is S 59 over South Fork Sunday Creek?
The structure is 164 ft (50 m) long with a longest span of 46 ft (14.1 m) and a deck 31 ft wide.
Who owns S 59 over South Fork Sunday Creek?
It is owned by the State Highway Agency.