121st Avenue SW over Heart River
FairStark County, North Dakota · North of South Heart · Structure no. 000000045112100
- Built
- 1986
- 39 years old
- Condition
- Fair
- inspected August 2024
- Type
- Box Beam or Girders - Single or Spread
- Prestressed Concrete Continuous
- Length
- 102 ft
- 3 main spans
- Daily traffic
- 710
- 2018 count
- Owner
- County
- County Highway Agency
About this bridge
121st Avenue SW over Heart River is a prestressed concrete continuous box beam or girders - single or spread carrying 121st Avenue SW over Heart River in Stark County, North Dakota. It was built in 1986, so it is 39 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 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 710 vehicles a day, roughly 10% of them trucks, projected to reach 1,000 by 2038. The structure is 102 ft (31.1 m) long and 35 ft wide. If it were closed, the detour would be 1.9 mi (3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 8 Very Good | No problems noted. |
| Channel and channel protection | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 121st Avenue SW over Heart River built?
It was built in 1986, making it 39 years old in 2025.
What condition is 121st Avenue SW over Heart 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 August 2024.
How much traffic does 121st Avenue SW over Heart River carry?
About 710 vehicles per day (2018 count), of which roughly 10% are trucks.
How long is 121st Avenue SW over Heart River?
The structure is 102 ft (31.1 m) long with a longest span of 38 ft (11.6 m) and a deck 35 ft wide.
Who owns 121st Avenue SW over Heart River?
It is owned by the County Highway Agency.