Is 170 W over Cst Nyflot Ave
FairSt. Louis County, Missouri · S 2979 T 47 N R 6 E · Structure no. 2500
- Built
- 1978
- 47 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 247 ft
- 4 main spans
- Daily traffic
- 27,257
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 170 W over Cst Nyflot Ave is a steel continuous stringer/multi-beam or girder carrying Is 170 W over Cst Nyflot Ave in St. Louis County, Missouri. It was built in 1978, so it is 47 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 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 27,257 vehicles a day, roughly 18% of them trucks, projected to reach 34,071 by 2044. The structure is 247 ft (75.3 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 170 W over Cst Nyflot Ave built?
It was built in 1978, making it 47 years old in 2025.
What condition is Is 170 W over Cst Nyflot Ave 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 Is 170 W over Cst Nyflot Ave carry?
About 27,257 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is Is 170 W over Cst Nyflot Ave?
The structure is 247 ft (75.3 m) long with a longest span of 71 ft (21.6 m) and a deck 42 ft wide.
Who owns Is 170 W over Cst Nyflot Ave?
It is owned by the State Highway Agency.