Is 70 W over Mo 370
FairSt. Charles County, Missouri · S 29 T 47 N R 4 E · Structure no. 4103
- Built
- 1993
- 32 years old
- Condition
- Fair
- inspected October 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 370 ft
- 3 main spans
- Daily traffic
- 53,648
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 70 W over Mo 370 is a steel continuous stringer/multi-beam or girder carrying Is 70 W over Mo 370 in St. Charles County, Missouri. It was built in 1993, so it is 32 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 53,648 vehicles a day, roughly 12% of them trucks, projected to reach 91,202 by 2044. The structure is 370 ft (112.8 m) long and 54 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 70 W over Mo 370 built?
It was built in 1993, making it 32 years old in 2025.
What condition is Is 70 W over Mo 370 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 2023.
How much traffic does Is 70 W over Mo 370 carry?
About 53,648 vehicles per day (2024 count), of which roughly 12% are trucks.
How long is Is 70 W over Mo 370?
The structure is 370 ft (112.8 m) long with a longest span of 183 ft (55.8 m) and a deck 54 ft wide.
Who owns Is 70 W over Mo 370?
It is owned by the State Highway Agency.