81st Ave. SW over Knife River
GoodDunn County, North Dakota · 4 South of Dodge · Structure no. 000000013143390
- Built
- 1990
- 35 years old
- Condition
- Good
- inspected November 2021
- Type
- Culvert
- Concrete
- Length
- 22 ft
- 2 main spans
- Daily traffic
- 65
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
81st Ave. SW over Knife River is a concrete culvert carrying 81st Ave. SW over Knife River in Dunn County, North Dakota. It was built in 1990, so it is 35 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 65 vehicles a day, roughly 10% of them trucks, projected to reach 120 by 2038. The structure is 22 ft (6.7 m) long. 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 |
|---|---|---|
| Channel and channel protection | 8 Very Good | No problems noted. |
| Culvert | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 81st Ave. SW over Knife River built?
It was built in 1990, making it 35 years old in 2025.
What condition is 81st Ave. 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 November 2021.
How much traffic does 81st Ave. SW over Knife River carry?
About 65 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is 81st Ave. SW over Knife River?
The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3 m).
Who owns 81st Ave. SW over Knife River?
It is owned by the County Highway Agency.