Mo 21 S over Mid Fk Black Rvr
FairReynolds County, Missouri · S 2 T 32 N R 1 E · Structure no. 3861
- Built
- 1989
- 36 years old
- Condition
- Fair
- inspected November 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete Continuous
- Length
- 554 ft
- 7 main spans
- Daily traffic
- 1,325
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Mo 21 S over Mid Fk Black Rvr is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 21 S over Mid Fk Black Rvr in Reynolds County, Missouri. It was built in 1989, so it is 36 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 5 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 1,325 vehicles a day, roughly 20% of them trucks, projected to reach 1,988 by 2044. The structure is 554 ft (168.9 m) long and 37 ft wide. If it were closed, the detour would be 44.1 mi (71 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 | 5 Fair | All primary structural elements are sound but may have minor section loss, cracking, 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 | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Mo 21 S over Mid Fk Black Rvr built?
It was built in 1989, making it 36 years old in 2025.
What condition is Mo 21 S over Mid Fk Black Rvr 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 21 S over Mid Fk Black Rvr carry?
About 1,325 vehicles per day (2024 count), of which roughly 20% are trucks.
How long is Mo 21 S over Mid Fk Black Rvr?
The structure is 554 ft (168.9 m) long with a longest span of 80 ft (24.3 m) and a deck 37 ft wide.
Who owns Mo 21 S over Mid Fk Black Rvr?
It is owned by the State Highway Agency.