County Highway 27 over Knife River
FairMercer County, North Dakota · 1 South of Hazen · Structure no. 000000029128190
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected July 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 161 ft
- 3 main spans
- Daily traffic
- 270
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
County Highway 27 over Knife River is a prestressed concrete continuous box beam or girders - single or spread carrying County Highway 27 over Knife River in Mercer County, North Dakota. It was built in 1979, so it is 46 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 fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
It carries about 270 vehicles a day, roughly 10% of them trucks, projected to reach 650 by 2038. The structure is 161 ft (49.1 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 8 Very Good | No problems noted. |
| 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 County Highway 27 over Knife River built?
It was built in 1979, making it 46 years old in 2025.
What condition is County Highway 27 over Knife River in?
The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.
How much traffic does County Highway 27 over Knife River carry?
About 270 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is County Highway 27 over Knife River?
The structure is 161 ft (49.1 m) long with a longest span of 78 ft (23.8 m) and a deck 31 ft wide.
Who owns County Highway 27 over Knife River?
It is owned by the County Highway Agency.