55 ST SW over Thirty Mile Creek
FairPosted for loadHettinger County, North Dakota · 10 E. 5 N. of New England · Structure no. 000000021113010
- Built
- 1971
- 54 years old
- Condition
- Fair
- inspected October 2024
- Type
- Slab
- Wood or Timber
- Length
- 24 ft
- 1 main span
- Daily traffic
- 26
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
55 ST SW over Thirty Mile Creek is a wood or timber slab carrying 55 ST SW over Thirty Mile Creek in Hettinger County, North Dakota. It was built in 1971, so it is 54 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 26 vehicles a day, projected to reach 26 by 2038. The structure is 24 ft (7.3 m) long and 23 ft wide. If it were closed, the detour would be 5 mi (8 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| 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 55 ST SW over Thirty Mile Creek built?
It was built in 1971, making it 54 years old in 2025.
What condition is 55 ST 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 October 2024.
How much traffic does 55 ST SW over Thirty Mile Creek carry?
About 26 vehicles per day (2018 count).
How long is 55 ST SW over Thirty Mile Creek?
The structure is 24 ft (7.3 m) long with a longest span of 22 ft (6.7 m) and a deck 23 ft wide.
Who owns 55 ST SW over Thirty Mile Creek?
It is owned by the County Highway Agency.