Mo 340 E over Is 270
FairSt. Louis County, Missouri · S 3 T 45 N R 5 E · Structure no. 29102
- Built
- 2002
- 23 years old
- Condition
- Fair
- inspected October 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 144 ft
- 2 main spans
- Daily traffic
- 30,696
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 340 E over Is 270 is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 340 E over Is 270 in St. Louis County, Missouri. It was built in 2002, so it is 23 years old, younger 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 30,696 vehicles a day, roughly 7% of them trucks, projected to reach 42,974 by 2044. The structure is 144 ft (43.9 m) long and 218 ft wide. If it were closed, the detour would be 8.1 mi (13 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 340 E over Is 270 built?
It was built in 2002, making it 23 years old in 2025.
What condition is Mo 340 E over Is 270 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 October 2024.
How much traffic does Mo 340 E over Is 270 carry?
About 30,696 vehicles per day (2024 count), of which roughly 7% are trucks.
How long is Mo 340 E over Is 270?
The structure is 144 ft (43.9 m) long with a longest span of 71 ft (21.6 m) and a deck 218 ft wide.
Who owns Mo 340 E over Is 270?
It is owned by the State Highway Agency.