12th Street SW over Knife River
GoodDunn County, North Dakota · 3 West 1 North Manning · Structure no. 000000013114390
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected June 2023
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 110 ft
- 3 main spans
- Daily traffic
- 107
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
12th Street SW over Knife River is a prestressed concrete continuous box beam or girders - single or spread carrying 12th Street SW over Knife River in Dunn County, North Dakota. It was built in 1987, so it is 38 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 107 vehicles a day, roughly 10% of them trucks, projected to reach 140 by 2038. The structure is 110 ft (33.5 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 12th Street SW over Knife River built?
It was built in 1987, making it 38 years old in 2025.
What condition is 12th Street SW over Knife River 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 June 2023.
How much traffic does 12th Street SW over Knife River carry?
About 107 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is 12th Street SW over Knife River?
The structure is 110 ft (33.5 m) long with a longest span of 37 ft (11.3 m) and a deck 31 ft wide.
Who owns 12th Street SW over Knife River?
It is owned by the County Highway Agency.