West Four Ridge RD over Mo 21
FairJefferson County, Missouri · S 7 T 42 N R 5 E · Structure no. 2528
- Built
- 1988
- 37 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 318 ft
- 2 main spans
- Daily traffic
- 2,621
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
West Four Ridge RD over Mo 21 is a steel continuous stringer/multi-beam or girder carrying West Four Ridge RD over Mo 21 in Jefferson County, Missouri. It was built in 1988, so it is 37 years old, younger 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 2,621 vehicles a day, roughly 4% of them trucks, projected to reach 4,718 by 2044. The structure is 318 ft (96.9 m) long and 35 ft wide. If it were closed, the detour would be 5 mi (8 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 | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was West Four Ridge RD over Mo 21 built?
It was built in 1988, making it 37 years old in 2025.
What condition is West Four Ridge RD over Mo 21 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 November 2024.
How much traffic does West Four Ridge RD over Mo 21 carry?
About 2,621 vehicles per day (2024 count), of which roughly 4% are trucks.
How long is West Four Ridge RD over Mo 21?
The structure is 318 ft (96.9 m) long with a longest span of 126 ft (38.5 m) and a deck 35 ft wide.
Who owns West Four Ridge RD over Mo 21?
It is owned by the State Highway Agency.