30th ST SW over Branch of Knife River
GoodStark County, North Dakota · 4 East 6 North Richardton · Structure no. 000000045148020
- Built
- 1977
- 48 years old
- Condition
- Good
- inspected August 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 48 ft
- 1 main span
- Daily traffic
- 80
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
30th ST SW over Branch of Knife River is a prestressed concrete tee beam carrying 30th ST SW over Branch of Knife River in Stark County, North Dakota. It was built in 1977, so it is 48 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 80 vehicles a day, projected to reach 60 by 2038. The structure is 48 ft (14.6 m) long and 31 ft wide. If it were closed, the detour would be 6.2 mi (10 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 30th ST SW over Branch of Knife River built?
It was built in 1977, making it 48 years old in 2025.
What condition is 30th ST SW over Branch of 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 August 2024.
How much traffic does 30th ST SW over Branch of Knife River carry?
About 80 vehicles per day (2018 count).
How long is 30th ST SW over Branch of Knife River?
The structure is 48 ft (14.6 m) long with a longest span of 44 ft (13.4 m) and a deck 31 ft wide.
Who owns 30th ST SW over Branch of Knife River?
It is owned by the County Highway Agency.