Old Rt N over Dardenne CR
GoodSt. Charles County, Missouri · S 304 T 46 N R 3 E · Structure no. 36178
- Built
- 1991
- 34 years old
- Condition
- Good
- inspected February 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 218 ft
- 3 main spans
- Daily traffic
- 10,203
- 2024 count
- Owner
- City
- City or Municipal Highway Agency
About this bridge
Old Rt N over Dardenne CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Old Rt N over Dardenne CR in St. Charles County, Missouri. It was built in 1991, so it is 34 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 10,203 vehicles a day, roughly 10% of them trucks, projected to reach 15,815 by 2044. The structure is 218 ft (66.4 m) long and 42 ft wide. If it were closed, the detour would be 11.8 mi (19 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 | 7 Good | Some minor problems. |
| Channel and channel protection | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Old Rt N over Dardenne CR built?
It was built in 1991, making it 34 years old in 2025.
What condition is Old Rt N over Dardenne CR 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 February 2024.
How much traffic does Old Rt N over Dardenne CR carry?
About 10,203 vehicles per day (2024 count), of which roughly 10% are trucks.
How long is Old Rt N over Dardenne CR?
The structure is 218 ft (66.4 m) long with a longest span of 72 ft (21.9 m) and a deck 42 ft wide.
Who owns Old Rt N over Dardenne CR?
It is owned by the City or Municipal Highway Agency.