Is 64 W over Is 70
PoorSt. Charles County, Missouri · S 30 T 47 N R 2 E · Structure no. 6271
- Built
- 1971
- 54 years old, rebuilt 2005
- Condition
- Poor
- inspected September 2023
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 307 ft
- 3 main spans
- Daily traffic
- 35,428
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Is 64 W over Is 70 is a steel continuous stringer/multi-beam or girder carrying Is 64 W over Is 70 in St. Charles County, Missouri. It was built in 1971 and reconstructed in 2005, so it is 54 years old, older than the Missouri average of 45.1 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
It carries about 35,428 vehicles a day, roughly 7% of them trucks, projected to reach 60,228 by 2044. The structure is 307 ft (93.6 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Superstructure | 4 Poor | Advanced section loss, deterioration, 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 64 W over Is 70 built?
It was built in 1971, making it 54 years old in 2025. It was reconstructed in 2005.
What condition is Is 64 W over Is 70 in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.
How much traffic does Is 64 W over Is 70 carry?
About 35,428 vehicles per day (2024 count), of which roughly 7% are trucks.
How long is Is 64 W over Is 70?
The structure is 307 ft (93.6 m) long with a longest span of 99 ft (30.2 m) and a deck 41 ft wide.
Who owns Is 64 W over Is 70?
It is owned by the State Highway Agency.