County Highway 90 over Little Knife River
GoodMorton County, North Dakota · 1 East 1 North of Hebron · Structure no. 000000030104041
- Built
- 1960
- 65 years old
- Condition
- Good
- inspected September 2024
- Type
- Box Beam or Girders - Multiple
- Prestressed Concrete
- Length
- 40 ft
- 1 main span
- Daily traffic
- 105
- 2022 count
- Owner
- County
- County Highway Agency
About this bridge
County Highway 90 over Little Knife River is a prestressed concrete box beam or girders - multiple carrying County Highway 90 over Little Knife River in Morton County, North Dakota. It was built in 1960, so it is 65 years old, older 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 105 vehicles a day, roughly 10% of them trucks, projected to reach 142 by 2042. The structure is 40 ft (12.2 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 8 Very Good | No problems noted. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was County Highway 90 over Little Knife River built?
It was built in 1960, making it 65 years old in 2025.
What condition is County Highway 90 over Little 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 September 2024.
How much traffic does County Highway 90 over Little Knife River carry?
About 105 vehicles per day (2022 count), of which roughly 10% are trucks.
How long is County Highway 90 over Little Knife River?
The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 31 ft wide.
Who owns County Highway 90 over Little Knife River?
It is owned by the County Highway Agency.