Mo 366 E over River Des Peres
FairSt. Louis city, Missouri · S 2 T 44 N R 6 E · Structure no. 2733
- Built
- 1977
- 48 years old
- Condition
- Fair
- inspected August 2023
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 233 ft
- 4 main spans
- Daily traffic
- 40,949
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 366 E over River Des Peres is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 366 E over River Des Peres in St. Louis city, Missouri. It was built in 1977, so it is 48 years old, older 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 40,949 vehicles a day, roughly 13% of them trucks, projected to reach 57,329 by 2044. The structure is 233 ft (71 m) long and 79 ft wide. If it were closed, the detour would be 8.7 mi (14 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 | 8 Very Good | No problems noted. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 366 E over River Des Peres built?
It was built in 1977, making it 48 years old in 2025.
What condition is Mo 366 E over River Des Peres 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 August 2023.
How much traffic does Mo 366 E over River Des Peres carry?
About 40,949 vehicles per day (2024 count), of which roughly 13% are trucks.
How long is Mo 366 E over River Des Peres?
The structure is 233 ft (71 m) long with a longest span of 72 ft (21.9 m) and a deck 79 ft wide.
Who owns Mo 366 E over River Des Peres?
It is owned by the State Highway Agency.