Is 170 E over Mo 115
FairSt. Louis County, Missouri · S 48 T 46 N R 6 E · Structure no. 2578
- Built
- 1979
- 46 years old
- Condition
- Fair
- inspected September 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 231 ft
- 4 main spans
- Daily traffic
- 52,174
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 170 E over Mo 115 is a steel continuous stringer/multi-beam or girder carrying Is 170 E over Mo 115 in St. Louis County, Missouri. It was built in 1979, so it is 46 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 52,174 vehicles a day, roughly 4% of them trucks, projected to reach 65,218 by 2044. The structure is 231 ft (70.4 m) long and 70 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 | 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. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 170 E over Mo 115 built?
It was built in 1979, making it 46 years old in 2025.
What condition is Is 170 E over Mo 115 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 E over Mo 115 carry?
About 52,174 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is Is 170 E over Mo 115?
The structure is 231 ft (70.4 m) long with a longest span of 77 ft (23.5 m) and a deck 70 ft wide.
Who owns Is 170 E over Mo 115?
It is owned by the State Highway Agency.