Is 57 S over Big Lk Byu
FairMississippi County, Missouri · S 9 T 27 N R 17 E · Structure no. 1776
- Built
- 1974
- 51 years old
- Condition
- Fair
- inspected January 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 673 ft
- 7 main spans
- Daily traffic
- 6,589
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 57 S over Big Lk Byu is a steel continuous stringer/multi-beam or girder carrying Is 57 S over Big Lk Byu in Mississippi County, Missouri. It was built in 1974, so it is 51 years old, older than the Missouri average of 45.1 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 6,589 vehicles a day, roughly 69% of them trucks, projected to reach 11,531 by 2044. The structure is 673 ft (205.1 m) long and 42 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Channel and channel protection | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 57 S over Big Lk Byu built?
It was built in 1974, making it 51 years old in 2025.
What condition is Is 57 S over Big Lk Byu 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 January 2024.
How much traffic does Is 57 S over Big Lk Byu carry?
About 6,589 vehicles per day (2024 count), of which roughly 69% are trucks.
How long is Is 57 S over Big Lk Byu?
The structure is 673 ft (205.1 m) long with a longest span of 111 ft (33.8 m) and a deck 42 ft wide.
Who owns Is 57 S over Big Lk Byu?
It is owned by the State Highway Agency.