US Highway 12 over Bnrr Separation
GoodSlope County, North Dakota · 1 West of Marmarth · Structure no. 0012005597
- Built
- 1984
- 41 years old
- Condition
- Good
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 221 ft
- 3 main spans
- Daily traffic
- 561
- 2022 count
- Owner
- State
- State Highway Agency
About this bridge
US Highway 12 over Bnrr Separation is a steel stringer/multi-beam or girder carrying US Highway 12 over Bnrr Separation in Slope County, North Dakota. It was built in 1984, so it is 41 years old, younger than the North Dakota average of 48.2 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 561 vehicles a day, roughly 23% of them trucks, projected to reach 717 by 2039. The structure is 221 ft (67.4 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
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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was US Highway 12 over Bnrr Separation built?
It was built in 1984, making it 41 years old in 2025.
What condition is US Highway 12 over Bnrr Separation 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 July 2024.
How much traffic does US Highway 12 over Bnrr Separation carry?
About 561 vehicles per day (2022 count), of which roughly 23% are trucks.
How long is US Highway 12 over Bnrr Separation?
The structure is 221 ft (67.4 m) long with a longest span of 104 ft (31.7 m) and a deck 38 ft wide.
Who owns US Highway 12 over Bnrr Separation?
It is owned by the State Highway Agency.