Mo 366 E over Gravois CR
PoorPosted for loadSt. Louis County, Missouri · S 8 T 44 N R 6 E · Structure no. 5309
- Built
- 1931
- 94 years old, rebuilt 1972
- Condition
- Poor
- inspected July 2024
- Type
- Stringer/Multi-beam or Girder
- Concrete
- Length
- 52 ft
- 1 main span
- Daily traffic
- 17,101
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 366 E over Gravois CR is a concrete stringer/multi-beam or girder carrying Mo 366 E over Gravois CR in St. Louis County, Missouri. It was built in 1931 and reconstructed in 1972, so it is 94 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. Its operating status is: posted for load restriction.
It carries about 17,101 vehicles a day, roughly 13% of them trucks, projected to reach 23,941 by 2044. The structure is 52 ft (15.8 m) long and 88 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 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
| Channel and channel protection | 4 Poor | Advanced section loss, deterioration, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 366 E over Gravois CR built?
It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1972.
What condition is Mo 366 E over Gravois CR 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 July 2024.
How much traffic does Mo 366 E over Gravois CR carry?
About 17,101 vehicles per day (2024 count), of which roughly 13% are trucks.
How long is Mo 366 E over Gravois CR?
The structure is 52 ft (15.8 m) long with a longest span of 52 ft (15.8 m) and a deck 88 ft wide.
Who owns Mo 366 E over Gravois CR?
It is owned by the State Highway Agency.