451 Ave (fas 6149) over I090
FairMcCook County, South Dakota · Montrose Interchange · Structure no. 000000044210126
- Built
- 1964
- 61 years old
- Condition
- Fair
- inspected December 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 254 ft
- 4 main spans
- Daily traffic
- 592
- 2023 count
- Owner
- State
- State Highway Agency
About this bridge
451 Ave (fas 6149) over I090 is a steel continuous stringer/multi-beam or girder carrying 451 Ave (fas 6149) over I090 in McCook County, South Dakota. It was built in 1964, so it is 61 years old, older than the South Dakota average of 48.9 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.
It carries about 592 vehicles a day, roughly 3% of them trucks, projected to reach 592 by 2043. The structure is 254 ft (77.4 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was 451 Ave (fas 6149) over I090 built?
It was built in 1964, making it 61 years old in 2025.
What condition is 451 Ave (fas 6149) over I090 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 December 2024.
How much traffic does 451 Ave (fas 6149) over I090 carry?
About 592 vehicles per day (2023 count), of which roughly 3% are trucks.
How long is 451 Ave (fas 6149) over I090?
The structure is 254 ft (77.4 m) long with a longest span of 70 ft (21.3 m) and a deck 32 ft wide.
Who owns 451 Ave (fas 6149) over I090?
It is owned by the State Highway Agency.