S 13 over Cow Creek
FairMcCone County, Montana · 10M S Vida · Structure no. P00025020+02171
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected March 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 124 ft
- 1 main span
- Daily traffic
- 792
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
S 13 over Cow Creek is a prestressed concrete stringer/multi-beam or girder carrying S 13 over Cow Creek in McCone County, Montana. It was built in 1993, so it is 32 years old, younger 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 792 vehicles a day, roughly 20% of them trucks, projected to reach 832 by 2043. The structure is 124 ft (37.9 m) long and 38 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 | 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 13 over Cow Creek built?
It was built in 1993, making it 32 years old in 2025.
What condition is S 13 over Cow 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 March 2023.
How much traffic does S 13 over Cow Creek carry?
About 792 vehicles per day (2023 count), of which roughly 20% are trucks.
How long is S 13 over Cow Creek?
The structure is 124 ft (37.9 m) long with a longest span of 120 ft (36.6 m) and a deck 38 ft wide.
Who owns S 13 over Cow Creek?
It is owned by the State Highway Agency.