86th Ave SW over Thirty Mile Creek
FairHettinger County, North Dakota · 6 North 5 East of Mott · Structure no. 000000021134120
- Built
- 1940
- 85 years old
- Condition
- Fair
- inspected September 2024
- Type
- Tee Beam
- Prestressed Concrete
- Length
- 91 ft
- 3 main spans
- Daily traffic
- 50
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
86th Ave SW over Thirty Mile Creek is a prestressed concrete tee beam carrying 86th Ave SW over Thirty Mile Creek in Hettinger County, North Dakota. It was built in 1940, so it is 85 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 fair condition with a lowest component rating of 6 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 50 vehicles a day, projected to reach 26 by 2038. The structure is 91 ft (27.7 m) long and 30 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 86th Ave SW over Thirty Mile Creek built?
It was built in 1940, making it 85 years old in 2025.
What condition is 86th Ave SW over Thirty Mile Creek 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 September 2024.
How much traffic does 86th Ave SW over Thirty Mile Creek carry?
About 50 vehicles per day (2018 count).
How long is 86th Ave SW over Thirty Mile Creek?
The structure is 91 ft (27.7 m) long with a longest span of 40 ft (12.2 m) and a deck 30 ft wide.
Who owns 86th Ave SW over Thirty Mile Creek?
It is owned by the County Highway Agency.