IRR - S 13 over Negro Coulee
GoodDaniels County, Montana · 5M S Scobey · Structure no. P00032045+00721
- Built
- 1988
- 37 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 89 ft
- 2 main spans
- Daily traffic
- 285
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
IRR - S 13 over Negro Coulee is a prestressed concrete stringer/multi-beam or girder carrying IRR - S 13 over Negro Coulee in Daniels County, Montana. It was built in 1988, so it is 37 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 285 vehicles a day, roughly 9% of them trucks, projected to reach 299 by 2043. The structure is 89 ft (27.1 m) long and 36 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was IRR - S 13 over Negro Coulee built?
It was built in 1988, making it 37 years old in 2025.
What condition is IRR - S 13 over Negro Coulee 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 August 2024.
How much traffic does IRR - S 13 over Negro Coulee carry?
About 285 vehicles per day (2023 count), of which roughly 9% are trucks.
How long is IRR - S 13 over Negro Coulee?
The structure is 89 ft (27.1 m) long with a longest span of 44 ft (13.4 m) and a deck 36 ft wide.
Who owns IRR - S 13 over Negro Coulee?
It is owned by the State Highway Agency.