S 59 over North Fork Sunday Creek
FairCuster County, Montana · 10M NW Miles City · Structure no. P00018011+00851
- Built
- 1963
- 62 years old
- Condition
- Fair
- inspected April 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 123 ft
- 2 main spans
- Daily traffic
- 727
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 59 over North Fork Sunday Creek is a prestressed concrete stringer/multi-beam or girder carrying S 59 over North Fork Sunday Creek in Custer County, Montana. It was built in 1963, so it is 62 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 727 vehicles a day, roughly 9% of them trucks, projected to reach 854 by 2043. The structure is 123 ft (37.4 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was S 59 over North Fork Sunday Creek built?
It was built in 1963, making it 62 years old in 2025.
What condition is S 59 over North 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 North Fork Sunday Creek carry?
About 727 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is S 59 over North Fork Sunday Creek?
The structure is 123 ft (37.4 m) long with a longest span of 61 ft (18.5 m) and a deck 31 ft wide.
Who owns S 59 over North Fork Sunday Creek?
It is owned by the State Highway Agency.