CR 7 (77th Ave Sw) over Knife River
GoodMercer County, North Dakota · 11 S 2 W of Golden Valley · Structure no. 000000029105300
- Built
- 1987
- 38 years old
- Condition
- Good
- inspected July 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 134 ft
- 3 main spans
- Daily traffic
- 25
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
CR 7 (77th Ave Sw) over Knife River is a prestressed concrete continuous box beam or girders - single or spread carrying CR 7 (77th Ave Sw) over Knife River in Mercer 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 25 vehicles a day, projected to reach 25 by 2038. The structure is 134 ft (40.8 m) long and 31 ft wide. If it were closed, the detour would be 5 mi (8 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. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was CR 7 (77th Ave Sw) over Knife River built?
It was built in 1987, making it 38 years old in 2025.
What condition is CR 7 (77th 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 July 2024.
How much traffic does CR 7 (77th Ave Sw) over Knife River carry?
About 25 vehicles per day (2018 count).
How long is CR 7 (77th Ave Sw) over Knife River?
The structure is 134 ft (40.8 m) long with a longest span of 59 ft (18 m) and a deck 31 ft wide.
Who owns CR 7 (77th Ave Sw) over Knife River?
It is owned by the County Highway Agency.