Is 70 W over Rt Z
GoodSt. Charles County, Missouri · S 25 T 47 N R 1 E · Structure no. 3537
- Built
- 1985
- 40 years old
- Condition
- Good
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 141 ft
- 3 main spans
- Daily traffic
- 38,059
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 70 W over Rt Z is a prestressed concrete continuous stringer/multi-beam or girder carrying Is 70 W over Rt Z in St. Charles County, Missouri. It was built in 1985, so it is 40 years old, younger than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
It carries about 38,059 vehicles a day, roughly 18% of them trucks, projected to reach 64,700 by 2044. The structure is 141 ft (43 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
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 8 Very Good | No problems noted. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Is 70 W over Rt Z built?
It was built in 1985, making it 40 years old in 2025.
What condition is Is 70 W over Rt Z in?
The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.
How much traffic does Is 70 W over Rt Z carry?
About 38,059 vehicles per day (2024 count), of which roughly 18% are trucks.
How long is Is 70 W over Rt Z?
The structure is 141 ft (43 m) long with a longest span of 59 ft (18 m) and a deck 42 ft wide.
Who owns Is 70 W over Rt Z?
It is owned by the State Highway Agency.