Mo 141 S over Mo 21
FairPosted for loadJefferson County, Missouri · S 664 T 43 N R 5 E · Structure no. 2320
- Built
- 1976
- 49 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Steel Continuous
- Length
- 228 ft
- 4 main spans
- Daily traffic
- 35,473
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 141 S over Mo 21 is a steel continuous stringer/multi-beam or girder carrying Mo 141 S over Mo 21 in Jefferson County, Missouri. It was built in 1976, so it is 49 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.
It carries about 35,473 vehicles a day, roughly 6% of them trucks, projected to reach 65,625 by 2044. The structure is 228 ft (69.5 m) long and 99 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 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 7 Good | Some minor problems. |
| Substructure | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, spalling or scour. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 141 S over Mo 21 built?
It was built in 1976, making it 49 years old in 2025.
What condition is Mo 141 S 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 Mo 141 S over Mo 21 carry?
About 35,473 vehicles per day (2024 count), of which roughly 6% are trucks.
How long is Mo 141 S over Mo 21?
The structure is 228 ft (69.5 m) long with a longest span of 72 ft (21.9 m) and a deck 99 ft wide.
Who owns Mo 141 S over Mo 21?
It is owned by the State Highway Agency.